Nov. 5, 1946.' R s COLLÈY ET AL 2,410,632 INPLATABLE SUIT , Filed Aug. 3,4943 ' ` 4 sheets-sheet 1` /JJ .Russe/7 5 'Engg/' . faena/Í .F'Kìunw ’ N¢v.5,1946. " >~ R. s. COLLEY mL ¿410,632 INFLATAÉLE SUIT Filed Aug._ 3,»19743 4 Sheets-Sheet 2 N0v.5,1946. ' -RSCOLLEY ETAL, INFLATABIKJE SUIT 90 5.5/ Filed Aug. 3, 1943 . 6@ 2,410,632 4 Shèets-Sheet 3 Nov. 5, 1946.. ` ì R. s. coLLEY Erm. 2,410,532 INFLATABLE SUIT Filed Aug. 3, 1943 l, u . 4 Sheets-Sheet 4 vll/771111111» ¿9% ' A-Pt'lt~e1itedNov. 15, 1.946 2,410,632 UNITED- _ STATES ~ PATENT 'OF/FICE? INFLATABLE sUrr Russell S. Colley, Kent, Carroll P. Krupp, Akron, , and Donald H. Shook, Cuyahoga Falls, Ohio, ‘ assignorsto The B. F. Goodrich Company, New York, Ni Y., a-corporation of New York Application August 3, 1943. serial No.r 497.182 13 Claims. (CL2-2.1) 2 -, This invention relates to inflatable suits and especially to suits for use at high altitudes where the air density and pressure are low. Flight at high altitudes has many advantages for civil and - . and full-circle turning or rotating movement of adjacent portions of the suit.- _ These. and other objects and advantages of the invention will be apparent -from the following military aviation, but such flight has been limited 45 description >and the accompanying drawings heretofore in part by physiological problems, for example aero-embolism, for the crews and pas sengers.. A suitable inflatable suit offers a solu which form a part of this specification and in ’ which like numerals are employed to designate `like -parts> throughout the same. tion of these ‘problems and the requirements‘of Fig. 1 4is a side view in elevation of an inflatable such a. suit are primarily concerned with the 10 suit including flexible joints constructed in »ac physiological'factors involved and Ways fòr pro cordance _with and embodying the invention. tecting the wearer against the harmful effectsof such factors. ` 4 Fig. 2 is a side view of an embodiment of the flexible joint for a limb covering. _ In the construction of inflatable suits for this Fig. 3 is a front view in the direction of forward purpose considerable dimculty has been encoun 15 and rearward swinging movement of the flexible-_ tered in providing effective joints giving'the de .joint shown in Fig. 2. sired degree offreedom and flexibility of move Fig. 4 is a sectional view in an enlarged scale~ » ment by the wearer, which dlfllculty has arisen taken along line 4_4 of Fig. 2. . through the inherent rigidity of the hollow por r Fig. 5fis‘a plan view` of a fabric strip in a ñat tions comprising the suit, which rigidity is caused 20 tened condition which may be arranged for pro by surface tension stresses established as a result viding bulges in opposite portions of the flexible of the inflation pressure therein. joint shown in Fig. 2. ' . An object of this invention is to provide a ' Fig. 6 is a sectional view in perspective of the compact, light~-weightinflatable suit of flexible _ regionat 6 in Fig. 2 and showing longitudinal and Wall material having movable joints of a con 25' circumferentially extending restraining elements, struction whereby extensive freedom of movement parts being broken away. - Fig. ’I is a side elevation of another embodiment may be had by the wearer notwithstanding the of ~the flexible joint. v stiif'ening of the walls by their distension from Fig. 8 is a sectional view in an enlarged scale an internal pressure which exceeds that of the outer atmosphere. Another object of the inven 30 taken along line 8_8 of Fig. 7. Fig. 9 -is a sectional. view in an enlarged scale tion is to pro"ide joint constructions suitable taken along line 9_9 of Fig. 8. . _ for an inflatable s_uit whereby a maximum degree . Fig. 10 is an enlarged ,side view of the region of -free movement of adjacent portions of the suit at il! in Fig. 7, parts being broken away. l may be obtained with a minimum of effort. >A further object is to provide a flexible joint for a » 35 _ Fig. 11 is a front View in elevation of the in flatable suit showing a, hip covering arrangement, v limb covering which provides for extensive ilexi parts being broken away. . ble movement of the limb by virtue of flexure of Fig. l2 is a sideview of Fig. 11. the joint over a >substantial extent of the limb Fig. 13 is a sectional view taken along line covering as distinguished from localized ilexure. . A still further object is to »provide for great free 40 lâ-l3 of Fig. l. Fig. 14 is a sectional view taken along the line . dom of movement at the region vof the hip of the ifi-ld oi’ Fis’. 1. ' wearer while preventing undue bulging of the Fig. 15 is a sectional view taken along the line " wall Vof the inflatable suit at the region of the iS-Iâ of Fig. l.. . " hip to facilitate sitting, standing, walking and 415 An inflatable suit should possess desirably cer bending actions. _. _ ` tain characteristics and be capable of performing More specific objects are to provide for detach certain functions as described more fully herein ably engaging the flexible joint with an adjacent after for meeting thev requirements of extended> part of the suit while' providingfor relative ro and safe service at high altitudes. Such service tating movement between ythe joint and the ad jacent part, to provide a joint fordetachably 50 may be exemplified vby an operator’s manipula tion of the controls and accessories of a military connecting adjacent parts of the suit which joint is-capable of withstanding internal pressure with wholly none or only negligible air leakage, and to provide a joint for' substantially unrestricted airplane„for example, wherein-extensive freedom and flexibility of movement is desirable _and wherein .undue bulkinessof the suit is objection 55 a-ble since the space within the operating com 1 , - miam and substantially free flexible movement >by the -v pari-.ment is generally of limited extent, and also ` by such actions as sitting, standing, bending, and reaching. j y wearer when the inflatable >suit is under an ap preciable internal pressure. All seams and joints of the ñexible wall material andyall other joints ' . The. phenomenon that an inflatable tubular ele and connector structures connecting the several - ment possesses great inherent rigidity due to sur -face tension stresses and strongly resists bending i _ parts of` the suit are sealed to prevent air leakage 'and to withstand the internal vpressureí and fiexure thereof, has made dit‘ilcult- the suc cessful solution of the problem of providing suit able joints for the inñated suit for obtaining ' - t Aviation type boots 33 and 34 may be worny overv I. the foot covering extensions of` the leg portions >to'protect the yvearer’s feet againstÀ the extreme ' maximum freedom ofmovement with minimum coldof high altitudes. .human energy expenditure. » A head piece. or helmet 35 of suitable shape, having provision for vision,l Our invention provides means for obtaining the ' ` desired extensive freedom and flexibility of move is attached in a detachable manner to the torso portion 2i at the'regionof the neck of the wearer to complete the enclosure of the wearer's body. ment of adjacent portions of the inflatable suits, whether such movement be turning or bending, or both in combination 'and provides'also for a Air, oxygen and electrical conductors are ad- , mitted into the suit from the flexible hose 35 substantially fluid-tight separable connector through a suitable >detachable connection 31, the hose 36 being in communication with suitable detachably inter-connecting an elbow or a knee joint to an upper part of the 'limb covering. The 20 sources of supply in the aircraft. Thus air forpressurizing the interior of 'the suit, oxygen for. invention provides a suitable rotataible connector breathing by means. of a face mask 38, and elec including sealing means for interconnecting a ,trical services for'an intercommunication means limb portion with a torso portion of the inflatable including a-radio arrangement having earphones suit for .providing relative full-circle rotating movement between the torso and the limb cover 25 39 and a throat microphone'iiil, and for electri structure which may‘include rotatable means for cally heated underclothing a?epprovided. The ing. Further, the invention provides for an ef-4 fective construction of the inilatable suit at the ` internal _air including exhaled air may be ex-` hausted to the atmosphere in any suitable man region’of the hips of the wearer. whereby free ner such, for example, as through a valve member ' flexible movement between the respective leg cov erings and the torso covering may be obtained 30 (not shown) which may be disposed at any suit ` able location on the suit and preferably at the without undue bulging and fiexure of the torso region of the knee. The flexible joint shown in Figs. 2 tot, inclu sive, may be used, for example, as an elbow joint '_ _ covering especially at the front wall thereof. `In many actions of the wearer, as when he stoops to pick up an-object, most if not all these movements of the suit are required simultaneously land in combination. 21, 28 or as a knee joint 29, 3D, the number of » I It is desirable that pressure within the suit be bulges, and therefore the lengthofthe joint, how ever, being altered to suit the particular appli maintained at a value` such. thatthe pressure upon cation. As noted above, if the limb covering for - the enclosed body -of the wearer will correspond to an atmospheric pressure existing at some more desirable lower altitude. so that the objectionable physiological effects on the wearer, as noted here>inabove,k are avoided. In view of this the suit including the joints should function satisfactorily under an appreciable range of differential pres the arm or leg were provided simply as a tube 40 of flexible material the 'stiñness of such tube . resulting >from inñation would render bending, as at the knee or elbow, exceedingly diiìcult even , sures existing .between the inside thereof and the several -constructional features cooperating in though the flexibility of the material permits some beneficial give or distortion under twisting ` 45 stresses.` Accordingly, the invention provides producing the result of maximum ease of flexure outside atmosphere. In the .illustrative embodiment of the inventionY as shown inV Figs. 1 to 6 and 11 to 15, provision is made for 'attaining ‘these and other ends.. Fig. 1 ` shows an inflatable-:suit 20 including joints per -mitting extensive' freedom of movement by the wearer notwithstanding the stiffenlng of wall por tions of the suit due to an internal pressure ex ceeding the outer pressure. The suit 20 includes a torso covering or portion 2i having an aperture at the neck and desirablyan elongated opening throughout a wide'range. The stiffness and re sistance to bending existing in the iniiated ilexi ble covering may be overcome in part by changing the shape of the covering at the joint, such, for , ` example, as by providing a series of outwardly bulged portions in the direction of forward and rearward swinging movement so that the con 55 tinuity of covering stiffness is interrupted throughout a substantial extent thereof. In the arrangement shown in Figs. 1 to 6, inclusive, the so for admitting'the body of the wearer, arm cover ings or portions 22 and 23 and leg coverings or portions 24 and 25 which may have'air-tight foot covering extensions. The walls of these portions Y are made desirably from a suitable `substantially ñexible joint provides this result whereby adia cent portions or parts of the arm coverings 22 and 23 and the leg coverings 213 and 25, them selves possessing considerable stiffness against bending by virtue of their inñated condition. are permitted to tilt with relation to the bulged por square-woven fabric having a resilient rubber 65 tions of the flexible joint somewhat in the man ner, for example, in which a valve stem on an impregnation or coating and which permits some inñated innertube is capable of tilting about the give or distortion under twisting stresses which region of- the innertube where the stem joins it give is beneficial especially in the limb coverings. despite the inflated condition of the tube. The suit also includesìa rotatable connector 26 The flexible joints 2l, 2%', 2€! and Sii each com-l at each shoulder, flexible joints 2l and 28 at the region of the elbows of the wearer.' flexible joints 70 prise a series of outwardly bulged portions for facilitating extensive and free flexible movement 29, 30 at the region of the knees of the wearer ci’ thelimb coverings at the region of the elbow and hip covering arrangements Si and 32 at the and the knee. The fiexible joint may have, for the wearer all of which ' region of the hips of _ _ example, four bulged portions for the elbow joint provide for movably attaching the several por and ñve bulged portions for the knee joint as tions or parts of the suit and permitting extensive Íimpervious flexible wall material preferably of 2,410,082 a shown in Fig. 1, or may have eight bulged portions l 4 as shown in Figs. 2 and 3,~or`may have ten bulged portions as shown in Fig. 7, the number ofA such 1 . portions comprising the series being such as to provide the desired extent of 'ilexibility and move-l ment. > , y o -` , ’ ` With reference to the -embodiment of Figs. 2 and 3, the flexible Jointincludes atubular mem ber 65 comprising flexible material, preferably tricot~knit fabric impregnated or _coated with `rubber-¿lire material, the fabric being arranged ¿such that the substantially circumferentially ex tending threads are in a substantially stretched _condition while the substantially longitudinally extending threads have a lesser extent of stretch i --for providing longitudinal give to the wall of the _joint and restraining circumferential give of said wan 'portion as ofthe joint is or similar con struction. , - , ,. While the tubular member may be a sleeve of suitable ilexible material, the member ls made . desirably from a series of shaped pièces 53, as ' shown especially in Fig. 5, assembled to form a. series of bulged portions including restrained and interconnected sidewalls, which arrangement, we have found, facilitates the bending action of the>> _joint throughout a wide range with greater ease of free ilexible movement as compared to the sleeve construction. .Each of the shaped pieces may be joined to one another- by means of a suitable adhesive such, for example, as rubber cement, the adjacent margins being in overlapped relationship. - ' s The circumferentially extending band elements wall under ilexure ofthe joint. The flexible ma 50 may include one or more cords 54„of cotton terial has substantial fullness at spaced-apart material, for example, and a fabric strip 55 hav positions along the tubular member in opposite 20 ving a suitable impregnation or coating of rubber front» and back portions in the direction of for’ like material, the cords andy fabric strips being ward and rearward swinging'movement whereby adhered to the tubular-member by a suitable ad a series of outward'bulges contiguous with one " hesive. The strip elements 5i and 52 maycom another, as shown‘Jor example, in Figs. 1,2 and prise one or more tension elements 56 of cotton ~3, in such oppdsitei'gportions is provided Each oi’ cord,‘for example, and a fabric covering strip 5l the outwardly buigedportions ¿46 and 47 are inter of suitable flexible material, the tension elements ` ‘.:c‘onnected by sidewall portions 43 and 49 which and fabric covering strip being adhered to the I >sidewall portions, as shown in the drawings, .ex sidewall portions as shown especially in Fig. 6, ’ f `tend ‘longitudinally y l along side regions oi’ the by a suitable adhesive.. With this arrangement member 45 substantially coextensive with and 30 the strip elements El and 52 prevent longitudinal . / between y the front and back bulged portions 4t I separating movement of the adjacent parts of the ‘~ and 51 and are of lesser >fullness as compared to the bulged portions _for `promoting swinging movement of the adjacent parts of the limb cov ering in the forward and rearward' direction by >flexure of the series oi’ bulged portions ’46 and el over a substantial extent of the limb cover ing. The sidewalls t8 and 49, being restrained against outward bulging by virtue of their lesser limb covering while alsov additionally restraining outward bulging of the sidewall portions. Each end 58, 59 of the tubular member may be attached to the upper and lower partsof the limb covering in any suitable manner such, for' example, as~ by a suitable adhesive but preferably in the man ner described hereinafter. For the arm coverings 22 and 28 an upper part fullness as compared to the bulged portions 46 40 l6l) of each such coverings may be secured at the' and t? may in> addition thereto function to re upper margin thereof at the region of the shoul strain longitudinal separating movement of the der to the respective annular rotatableconnectors adjacent parts of‘the limb covering. -I'his ar 26, 2e in the'manner shown especially in Fig. rangement relieves in a large measure the ilex 13 and described more fully hereinafter with ible material of the tubular member of stresses respect to said Fig. 13, which arrangement makes in its surface in the longitudinal direction of the possible full-circle relative rotating movement covering, thus appreciably increasing its ilexi between the arm coverings and the torso cover bility which facilitates the bending action of the ing through the turning movement of the rotat -series of bulged portions throughout a much ~ able connectors 26„ 26; while the lower margin wider range andwith greater ease than 'is ob tainable with a non-restrained sidewall construc '50 of the upper part Se may be attached,_ for ex ample by a suitable adhesive and clamping band tion. @2, to a detachable connector structure Si pref While a flexible joint constructed as described' erably including rotatable means as shown espe hereinabove provides desirable flexibility of cially in Fig. 15, which latter attachment is de ~ lmovement, we have found that1 maximum ñexi 55 scribed more fully hereinafterl with respect to , bility of the iolnt and ease of movement through Fig. 15. The end 59, for example, of the tubular out an extremely wide range is. made possible by member «l5 of the flexible joint comprising the j disposing circumferentially extending band ele elbow joint 2l, 23 _may be attached to the con ments Si? of flexible material between adjacent bulged portions ¿it and el for restricting outward 60 nector structure di by a suitable adhesive and a clamping band 63. The other end et' of the bulging of the tubular member to the bulged por-' member e5 ofthe flexible joint 2l, 2t may be vtionsand. for promoting swinging movement of the limb covering inthe forward and rearward direction by limiting flexure of the tubular -meme ber to the series of bulged portions, and by dis» posing'strip elements 5i and et?. of flexible ma terial along the tubular member at the sidewall portions, preferably at- the central region of such joined to the lower part of the limb covering, vfor , example, a glove ed, 65, as byv a suitable adhesive. This arrangement for the arm covering 22,~.23_ provides for. a maximum of free forward and >rearward bending of the arm covering 'and for detachably interconnecting the elbow joint to the upper part et while providing unlimited relative sidewall portions, for restraining longitudinal separating movement of the adjacent parts of 70 rotating movement between the elbow joint and the upper part. This arrangementalso provides the limb covering and for -additionally restrain full-circle relativev rotating _movement between ing outward bulging oi such sidewall portions. the arm covering and the torso covering at the ' The details of construction at the strip element ' region of the shoulder, all >of which contribute 5i are more fully shown in Fig. 6. The construc tion at the strip element ‘52 at theiopbosite side» 75 to and facilitate moving and nearing the arm cov» ering despite the internal pressure, even to placa 0,410,089 ing the hand at the back of the torso covering or, and 32h and for facilitating and promoting swing for example, at the back of the neck, as well as ` in various forward positions as may be. required - dru‘rìtng manipulation of the controls of the air c ing movement oi the leg ,portion in the forward and rearward direction by limiting ilexure of the hip coverings to these outwardly bulged portions. 6 During such swinging movement the bulging of the portions 3io and Sib and 32a and 32h is of . vWith respect to the leg covering 24, 25,- the lesser extent in some parts thereof than in other knee joint 29, 3B, which flexible joint may includethe tubular member ' flexible joint for the parts. ‘ _ ' In >order to restrain llongitudinal separating Il having ends 58 and B9 may be attached to a l0 movement of the lower portion of the'legcover lower part or foot covering extensions. as by a ing with respect to the torso covering at the ‘ suitable adhesive and may be interconnected with inner region of the hip coverings 3i, 32, a strap an upper part including a hip covering Il, 32 by element 12 of suitable flexible material such, for a detachable connector structure including ro example, as a woven fabric tape, extends con-tatable means as shown in Fig. 15, but inasmuch lo tinuously along the hip coverings inside the suit ' - as a lesser extent of relative rotation between the at such inner region and extends continuously respective parts of the leg covering is required between and is attached only at the respectivel than that required of the arm covering. the de lower‘ margins 3io and 32e of the hip coverings, aired relative rotation may be provided by the as shown especially in Figs. l1 and l2. There give of the flexible wall material by virtue of ' 20 spective ends of the strap 12 may be attached to which the flexible joint 29, 30 may be intercon the detachable connector structures 66, '8B for nected with the hip covering Il, 22 by a detach-v - the respective leg coverings 24,'V 25 b'y a looped able connector structure 58 shown especially in arrangement thereof extending through one of Fig. 14. The attachment of the tubular member diametrically opposite slotted apertures Hlv in a l! of the knee joint 29, I0 to the connector struc 25 sleeve structure `i I8 of each of such connector ture Il or, if more extensive relative rotative movement is desired, to the connector structure Ii is described more fully hereinafter with respect to Figs. 14 and 15. ' structures 66,> 66 and the overlapping >looped portions of said ends of the strap adjacent the sleeve structure lit may be sewed together along their vmargins at |42 in the manner shown in 4 For providing flexible swinging movement in ,30 Fig. 14. The strap element 12 is in the forward and rearward direction between the leg covering 2Q, 2i andthe torso covering 2l, hip coverings 3|, 32, arranged as shown in Fig. 1, flexibly interconnect the lower part of the leg sliding en gagement with the wall of the suit at the central junction` region '61 of the hip coverings 8|, 32 and the torso covering 2i, and when the hip cov erings are flexed or bent with respect to the torso covering including the flexible joint 29. 3,0 with :i5 covering and with respect to each other, for the torso covering. As shown especially in Figs. example. when the hip covering 32 is flexed to 11 and 12, each hip covering 3i, 32 ofpsuitable the position 68 and the -hip covering 3i is flexed ` ñexible material includes a series of outwardly to the position 89, such sliding engagement coin bulged substantially yannular portions 3io, 32a, pensates for the extension and contraction of tapering from the outer region 61u of the hip of 40 the respective hip coverings duringvsuch flexure. inner region 61 at the central However, since the strap element 12 is dis ' the wearer to the junction of the-leg coverings 2l, 25 and the torso posed at-the inner region of the hip coverings, covering 2l and may include a series of substan it is desirable to provide a compensating ten tially uniform longitudinal and circumferential >sion member 13, 1 4 inside the suit at the outer Sib. 32h, also outwardly bulged region at 61a of each of the hip coverings and ring portions in bending extending from the lower .portion of the torso which provide additional flexibility action of the hip covering through cooperation covering 2i to the lower margins 3io and 32o portions. Each hip of the hip coverings for additionally restraining with the tapered annular covering is arranged to assume under inflation '_ separating movement of the leg coverings with conditions a position intermediate a position 6B 50 respect to the torso covering.> For the con at right angles to the torso covering and a posi struction shown especially in Figs. 11 and 12, tion 6I along the longitudinal axis of the torso each tension member 1I, 14 includes strip ele covering, whereby the leg coverings 24, 25 includ ments 15, 18 and 11 of flexible material such as ing the hip coverings pivot substantially at the woven fabric tape arranged in a forked arrange pivotal axis of the hips of the wearer for swing 55 ment, the junction of~ which is preferably pom , ing movement in the forward and rearward di rection relative to the torso covering while pre venting undue bulging and bending of the' torso 'ti'oned‘ at substantially the pivotal axis of the hip of the wearer and the respective remote `ends oi the strip elements suitably secured to the torso . covering 2l especially at the front wall portion' covering 2l and secured at the respective lower thereof intermediate the leg coverings. If de 60 margins Sic and 32e to the detachable connector sired, the hip covering may be provided with structures «86 as by the slotted aperture and restrained sidewall portions as shown in Fig. 1, looped arrangement described hereinabove for andfor such a construction the hip covering is the ends of the strap 12, whereby these strip provided with strip elements 5 lo and 52a adhered elements cooperate in withstanding the tension by the rubber so as to be attached thereto along 65 load under inflation conditions when the hip the sidewalls for further restraining the sidewalls covering is~ bentv forwardly and rearwardly rela and for preventing longitudinal separating move tive tothe torso covering. These strip elements ment of the knee joint and the torso covering, at the junction thereof may be attached as by end each strip element Bia'being also attached to the loops Vin sliding engagement with a swivel ring torso by a fastening patch Sib of suitable fabric 70 18 of stiff material such, for example, as steel. and a suitable adhesive. Band elements 10 and 1I to facilitate the cooperation of the respective of suitable flexible material are disposed circum ferentially between adjacent outwardly bulged strip elements 15, 16 and 11 during such bend ing movement. ' Sib, 32a and 32h for restricting Each strip element 15 may be attached at its the outward bulging of the hip covering to such 75 remote end to a connector structure BB as de -----1--- «a fino mrtimis 3io and 3lb and 32a 9 . aciacsa scribed hereinabove and shown especially in Fig.- - 14. Each strip element 'i7 may be secured at its remote end as by a suitable adhesive to the front wall of the torso covering and the strlpelement 1S, which- may extend continuously between the swivel rings 'I8 of the respective compensating tension members la, 'M and along the back wall of the torso covering as shown especially in Figs. 11 and 12, may Ibe, attached-to an intermediate the annular ring element B0. A snubbing ac tion upon the torso covering adjacent the neck results from the reverse bend of the flexible ma terial which action restricts spreading movement of the respective rotatable connectors while pre venting upward movement of the headpiece 3E.' An annular element 90, generally trapezoidal in section, may be attached as by a suitable ad ' lhesive to the margin of the neck aperture in the 10 torso covering, which annular element is disposed A portion of the strip elements ‘i6 and 1l, in an annular l grooveY in a suitable neck ring portion of such back wall as by a suitable adhe sive. adjacent the swivel ring 18 are not secured to the torso covering but are free for relative move structure 9|. The torso covering 2| including the annular element 00 vmay be secured detach ably to the neck ring, 9| by means of a suitable element 15, whereby desirable cooperation is se-l 15 clamping band 92 which band 92 may be sheathed cured «between such elements. When the hip in a suitable fabric'cover 93 adhered'to the torso covering 32 is in the position B8, the strip ele covering. The head piece 35 may be detachably ments 15 and ‘i6 cooperate in withstanding the engaged with the neck ring 0| in any suitable man» tension stresses; when the covering 32 is in the ner, such, for example, as shown in the copending intermediate position, as shown especially in Fig. 20 application oi’- Carrol1 P. Krupp, Serial No. 453, ment with respect to each other and to 'the strip . 12, the _elements le, l1 mutually cooperate with 175, illed August l, 1942. For separating thethe strip element 15; and when the covering 32 space in the head piece from the space in the in is in the position 69 the strip elements 'l5 and '|7 ñatable suit to aid in preventing fogging of the cooperate in withstanding the tension load. headpiece, a suitable diaphragm 90 of resilient Such an arrangement of the hip coverings as 25 rubber-like material having an aperture for the described hereinabove facilitates flexing of the head may be provided and may be attached to leg coverings at the region of the hips while pre- ' the neck ring 9| by a suitable adhesive .and a venting objectionable bulging of the torsocover metal ring 95, which metal ring may be held in ing which bulging deñnitely restricts freedom of place by a plurality of spaced-apart screws 96. ' .movement by the wearer, especially when in a For providing relative rotating movement be sitting position. A30 tween the upper part 60 of the arm covering 22, We have found that such an arrangement of 23 and the ilexible joint 2l, 28, and for intercon `hip coverings and flexible joints at the knees, necting the same a detachable connectorv struc vdescribed hereinabove, cooperate eiïectively in ture 6| shown especially in Fig. 15 may be used. providing maximum free iiexible swinging move A structure identical with structure 0| may be ment of the legs relative to the torso covering used for interconnecting the knee joint 29, 30 without undue expenditure of human energy and the hip covering 3i, 32 `to provide extensive despite the internal pressure-therein. The rub relative rotating movement between such knee ber and fabric parts of the suit are united inte joint and hip covering. The connector 6| in grally by vulcanization. 40 cludes a sleeve structure |00 to which may be se In the shoulder joint 26, illustrated in Fig. 13, cured` the end 59, for example, of the tubular the torso covering 2| may be adhered and sealed member et of the ilexible joint 27, 20 by means to the exterior surface of an annular ring element 30 by means of rubber cement, for example, and of a suitable adhesive and a clamping band 68, which structure includes a bearing race |0| at the securedy ñrmly in place thereto by a suitable 45 outer face thereof intermediate the ends of the clamping band or strap 8|, the annular ring ele structure |00 providing an extension |02, The ment having an inwardly extending ñange to pro sleeve structure |00 also includes a ring element vide for a Ibearing race element 82. In like man w3 mounted at the outer yface thereof and over ner'the upper part S0 of the arm covering 22, 23. ‘ lapping 'the' bearing~ race lill, which element in may be secured by means of a strap 8d and by 50 cludes a bearing race ltd adjacent and in register cementing to an annular element 83 having an with the bearing race lei. A plurality of rotat outwardly extending flange to provide for a bear able elements |05 is disposed between the bear ing race element 85 in overlapping relation with ing races for providing relative full-circlev rota the other bearing element 82. The annular ele tion therebetween and for securing the element ` ments 86 and ed are maintained in assembled re 55 |03 to the structure |08. lationship .fby means of a metal snap ring or re The lower margin of upper part 60 of the arm tainerelement 86 seating in an annular recess covering may be secured to a second sleeve struc Bl in the interior surface of the element 80 ad ture |08 by a suitable adhesive and the clamping jacent the bearing element Bâ and by means of a rubber sealing ring'eë including a metal insert 60 band 62, the structure |06 being in telescopic en gagementat the extension |02 of the sleeve struc 39 which, as shown in Fig. 13, limits .movement ture |00 and in overlapping relation with the lat of the element 83 including the bearing race ele ment 85 toward the sealing ring 88, the sealing I ter structure. Where the detachable connector structure di is to be used at the knee joint 29, ring having a face contiguous with the retainer ' element 86 and having an, inwardly extending 65 30, the attachment of the strap 'it and the ele ment 'i5 of the compensating tensionl member flange portion contiguous with the flange portion 7?», 'It to the sleeve |06 maybe made in the man of the annular element 03 to provide an air seal. ner shown in Fig. 14 at the sleeve H8. The sec For'the arrangement of the torso covering 2| ond structure |06 is also provided with a de and the rotatable connector 26, as shown in Fig. 13, the spacing of the respective shoulder joints 70 pression l0‘l adjacent the face of the ring ele mentl |03 opposite the bearing race |04 and 4in of the suit may be ci' lesser extent whereby the register with a depression |08 in the _element overall Width o'f the suit at the region of the shoul |03. An expansible-.contractible annular mem ders is less than would otherwise be the ease ber |03 is .disposed in these depressions |01 and were the torso covering 2| to be attached. to the rotatable connector 26 from the opposite end- of 75 |08 between the element |03 and the structure |06» for detachably engaging the. sleeve struc 2,410,682 _ lil _ ` tures |00 and |05. A suitable sealing ring H0, preferably of resilient rubber or other rubber like material, is disposed between the structures i region through flexure of the series of outwardly bulged portions as described hereinabove while the hi'p covering facilitates ‘free movement at the region of the hips through the pivoting action thereof at substantially ¿the pivotal axis of the |00 and ’|06 in an anular depression ||| in thestructure |06 and may be heldin place by pres sure ofthe material against the walls thereof and by a metal snap ring ||2. The sealing ring, ||0 hip of the wearer. The outwardly bulged annular portions 32a and 32h 'ofèthe hip covering 3'2 flex ' substantially throughout their length circumfer is provided with a sealing lip ||3 which engages . entially and longitudinally, while the strap ele ~ment 12 being in sliding engagement with-the preventing air leakage through the’connector 10 wall of the‘suit at the central junction 61 of the extension |02 of the structure |00, thereby structure 8| . ‘ . the torso 2| and the leg coverings 2l, 25 com- - . Since extensive relative rotating movement be pensates for variation in hip covering length at tween the flexible joint 23 and 30 and the 'hip the inner region thereof and cooperates with the covering 3| and 32 is not required for providing compensating tension member 14 in preventing 16 the desired freedom of movement, the detachable longitudinal separating'l movement of the torso connector structure 68, as shown especially in covering and the- lower portions of the leg cover Fig. 14, may be used for interconnecting'these ings. With the leg covering 25 in the position parts of the suit; although the connector struc shown in Fig. 1 the tension load stresses are taken ' ture 6| (Fig. 15) may be used, if desired, for by the strip elements 15 and 15. of the tension providing such >extensive relative rotating move-_ 20 member 14 disposed in the hip covering 32, which ment. The end 59 (Fig. 14) for example, of the arrangement also prevents longitudinal separat tubular member I5 of the ñexible joint for the ing movement of the leg portion 25 and the knee may be secured to a sleeve structure I_I5 as torso portion 2| at the outer region of the hip` by a suitable adhesive and‘ the clamping band e covering 32. 83, which structure includes a depressed portion 25 Another embodiment of the iiexible joint for IIB at the outer face and intermediate the vends the limb covering is shown in Figs. '1 to 10, in of the structure providing, an extension H1. The clusive, which- joint may be used at the region lower margin 3Ic, 32e of the hip covering 3|, of the elbow or the knee and which joint may be 32 may be secured to a second sleeve structure of greater longitudinal extent along the limb ||8 as by a suitable adhesive and the clamping 30 covering than the flexible joints 21 to 30 shown band 52, which structure is in telescopic engage in Fig. l. Under some conditions it may be de ment with the structure ||5 at the 'extension ||1 sirable to provide a flexible joint |25 intermediate . and in overlapping relation with the structure | I5. the upper and lower parts of the limb coverings The second sleeve structure |18 includes a de .which extends substantially the full length ofV the pressed portion ||9 at the inner face and in reg limb coverings and which is arranged to tend to ister with the depressed portion | i0. An expansi assume a bent condition conforming to the nat vble-contractible annular member |20 is disposed - ural curve of the arm or leg of the wearer when, in the depressed portions ||6 and ||3 for detach ably engaging the structures ||5 and H8. A . sealing ring |2| of suitable rubber-like material 40 is disposed between the structures ||5 and ||3_ at the extension ||1 and is disposed in an annular depression |22, which may be dove-tailed in sec tion, in the structure H8. The sealing ring |2| may be held in the depression |22 by pressure of 45 the material against the walls thereof and by a metal snap ring |23. The ring |2| is provided ` with a sealing lip |24 engaging the extension ||1 ` for preventing air leakage through the- detachable connector structure 68. ' for example, the wearer is seated and manipulat ing the controls of the aircraft. The flexible joint |25 shown ‘ in Fig. 7 is espe- i cially adapted for such use and is shown as ap plied to the arm covering which covering> in cludes an upper part |26, a lower part or glove |21 and the flexible joint |25. This flexible joint comprises a tubular member comprising flexible material such, for example, as square-woven fabric impregnated or coated with resilient rub ber or other rubber-like _material and lhaving 50 substantial fullness at spaced-apart positions Normal use of the inflatable suit shown in Fig. 1 requires frequently the raising .and lowering along the tubular member in opposite portions in the direction of forward and rearward swinging movement for providing a series of outward bulges of the arm in combination with bending of the |28, |29 in the opposite portions. Sidewall por elbow of the wearer. In operation `under >such a tions |30, |3|, each of similar construction at op 55 condition each arm covering 22, 23 may be freely posite sides of the joint |25, interconnect such raised or lowered by means of relative full-circle bulged portions and are restrained from outward between-‘the arm covering and the torso .rotation bulging as compared to the bulged portions |23, covering 2| through the turning movement of the rotatable connector 25. Extensive andfree ilexi ble bending at the elbow is permitted by the fiexl‘ ble joint 21, 23, which bending in the forward and rearward direction is attained through ñexure of the'series of outwardly bulged portions along a - substantial extent of the arm covering. Further |23 to promote swinging movement of the upper |26 and lower |21 parts of the arm covering in the forward and rearward direction by flexure of the series of bulged portions over a substan tial extent of the arm covering. For restricting outward bulging of the tubular member to the bulged portions and for additionally restraining freedom of movement is provided by the detach 65, outward bulging of the sidewall portions, band able connector structure 8| which permits rela elements |32 of suitable flexible material are dis tive rotating movement between the flexible joint posed circumferentially between adjacent bulged andthe upper part 60 of the arm covering. portions of the tubular member. These band ele The hip coverings 3| and 32 cooperatel with ments |32 each, desirably, include one or more 70 the 'flexible joints 23 and 30- at .the knees of the , cords of cotton material, for example, and a suit , wearer in providing extensive and free flexible able fabric covering strip, the cords and covering swinging movement of the leg coverings 24, .25. strip being adhered to the ~wall of the tubular for example, is ,bent When the leg covering 25, member as by a suitable adhesive. 1 the flexible joint' ' in the _manner- shown in Fig. 75 _For further restraining outward bulging of the 30 at the knee provides extensive bending at` this 14 _ sidewall portions and for restraining longitu dinal separating movement oi' the upper and lower parts of the arm covering, tension elements |33, ißt of flexible material such, for example, as twine extend along the tubular member at the side-_wall portions. For maintaining the bent po sition of the flexible joint under inilation condi tions the tension elements extend along the tubu lar member at a determinate distance from the is maintained under ini'lation of the `suit and joint and means restraining -longitudinal sepa-'1 rating movement of said adjacent parts ofthe limb covering and restraining outward bulging of said sidewall portions, longitudinal axis thereof and are spaced from the - ' flexible _wall material, an arm covering of flex sidewall portions. The details of construction at the tension element |33 are shown ¿especially in Figs. 7 to 10 and the construction at the ten ible wall material including a ilexible joint to provide for forward and rearward bending oi' said arm covering, and an annular rotatable con-` sion element ist at the opposite sidewall portion of the joint is of similar construction. These tension elements are supported> in the desired po sition by means of ilexible hinge structures i35 including ring elements |38 which structures are attached to the sidewall portions at substantially the respective central regions \ longitudinally thereof as shown especially in Fig. 7.. Each flex ible- hinge structure |35 includes an attaching. patch i3l of suitable woven fabric which is adhered to the sidewall by a suitable adhesive and a hinged portion E38 also of suitable woven fabric .which is adhered in a similar manner to the at . 2. An inilatable suit including a torso portion and an arm portion for-increasing aL body pro jvidingl -free flexible movement of the arm, isaid- portions comprising a torso covering, of nector interconnecting said torso and said arm coverings `and vproviding full-circle relative ro tating movement'between said coverings, said ilexible joint'compìîising a tubular structure com prising -~flexible `material,having substantial full.. ‘ .-ness at spaced-apart`v positions along said struc 20 -ture in OpDOSlte'i’r'ont and backportions to pro vide a >series of outward bulges in the direction of forward-'and rearward swinging movement, >said .l 'bulges being contiguous with one another in each ’ of said opposite portions, and having sidewall por~ 25 taching patch itl, which hinge portion i3@ in cludes the ring element ist. The tension ele tions extending longitudinally along-side regions of said tubular structure» coextensive with the front and back bulged portions and between and interconnecting such bulged portions and being of lesser fullness and substantially restrained ments §35 of the flexible hinged structures, as shown especially in Figs. 9.and 10, and being 30 from outward bulging as compared to said bulged fments §38 and i3d extend through the ring ele spaced from the sidewall portionsby the hinged portions i3d, ilexure of the hinged structures is thereby facilitated during the swinging move ment of the ilexible joint. During such swing' ing movement the hinge portion H38 may assume _several positions in coaction with the tension ele ment such, for example, as positions E39 and itil, as shown by the broken lines in Figs. 9 and 10. The arrangement of the flexible joint i25 provides 40 for free ilexible movement of the adjacent parts of the limb covering in the direction of forward and rearward swinging movement, the respective components thereof cooperating -with one another in obtaining this result. Variations may be made without departing from the scope of’ the inven on as it is defined in the following claims. We claim: ' _' ~ ' portions to promote swinging movement of ad dacent parts of said arm covering in said kdirec tionv .by ?lexure of said series of bulged portions over a substantial extent of vsaid arm covering while lateral compactness‘of the joint is main tained under in_ilation of the suit andjoint, and means restraining longitudinal separating move ment of adjacent parts of the arm covering and restraining outward bulging of s‘aid sidewall por tions. ‘ 3. An inilatable suit including a torso portion and a limb portion for incasing. a body providing free ilexible movement of the limb, said portions comprising a torso covering 'of flexible wall ma terial and a limb covering of flexiblewïall ma teria'l- including an upper part. a lower part, a lflexible joint intermediate said parts, and ade tachable connector structure' interconnecting said upper part and said ilexible joint, said joint com- . l. An inflatable suit including a torso portion 50 prising a tubular member comprising flexible ma~= . and a limb portion for incasing a body and pro teria] having substantial fullness at spaced-apart viding free flexible movement of the limb, said positions portions comprising a torso covering of flexible and back wall material and a limb covering of flexible wall bulges in material including a flexible joint intermediate 55 swinging along said member in opposite front _ portions to provide a series of outward the direction of forward and rearward movement, said bulges being contigu the length of'said limb covering and intercon ous with oneanother in each of said opposite por necting adjacent parts of vthe latter covering to tions, and said tubular member having sidewall provide for forward and _rearward bending there? portions extending longitudinally along side re of, said'ilexi-ble joint comprising a tubular struc gions of'said tubular member coextensive with ture comprising flexible >material having *substan 60 the front and back bulgedportions and between tial fullnessat spaced-apart positions along said and interconnecting such ¿bulged portions and be structure in opposite front and back portions in ing of lesser fullness and substantially restrained the direction of forward and rearward swinging from outward bulging as compared to said bulged movement to provide a series of outward bulges portions to promote swinging movement of said in said opposite front and back portions and hav~ 65 upper and lower parts ofthe limb covering in said direction by ilexure of said series of bulged por along side regions of said tubular structure coex tions over a. substantial extent of said limb cov tensive with the front and .back bulged portions ering while lateral compactness _of the joint is and between and interconnecting such bulged por maintained under inflation of the suit and joint, tions and being of lesser fullness as compared to 70 _means disposed oircumi’erentially of said tubular said bulged portions to promote swinging move' member between adjacent bulged portions for` re ing sidewall portions extending longitudinally ment of said adjacent parts of said limb covering in said direction by flexure of said series of bulged portions over a substantial extent of said limb stricting bulging to the latter said portions, and means comprising strip elements of flexible ma terial extending along said tubular member at covering while lateral compactness of’ the joint 75 said sidewall portions for restraining longitudi 2,410,632 - 15 nal separating movement of said upper and lower parts and for additionally restraining outward bulging of said sidewall portions. w 4. An inflatable suit as defined in claim 3 in> which said detachable connector structure in cludes rotatable means providing substantially full-circle relative rotating movement between said flexible joint and said upper part of the limb covering; t i i a 5. An inflatable suit including a torso portion and a legrv portion for incasing a body providing substantially free flexible movement of` the leg, said portions comprising a torso covering of flex ible wall material and a leg covering including a. inflation conditions when the leg covering is bent forwardly and rearwardly relativeV to the torso i covering. '1. An in Yñatiabie ' suit comprising a torso cover- ' ing of. flexible wall material Vand a pair of' leg coverings including hip coverings of flexible wall material arranged to assume under inflation con’ ’ ditions a position intermediate a position at right angles to said torsocovering and a position along l0 the longitudinal axis of said >torso covering and said leg coverings being arranged for swinging` movement in a forward and rearward direction relative to said torso covering by pivoting sub stantially at the pivotal axis of the hips of the wearer whereby unduev bending and bulging of hip covering of flexible wall material, said hip the torso covering is prevented, each of said hip covering comprising a series of outwardly bulged coverings having a lower margin and comprising each . substantially annular contiguous portions a series of outwardly bulged substantially annu tapering from the outer region of the hip to the lar contiguous portions each tapering from the inner region thereof at the central junction of outer region of the hip to the inner region thereof 20 the leg covering andthe torso covering, means at the central junction of the leg covering and disposed circumferentiall, betweenadjacent an the torso covering, means disposed circumferen tward bulging of -~ nular portions for restraining ou tially between adjacent annular portions for re said hip covering to said annular portions and stricting outward bulging of said hip coverings for promoting swinging movement of the leg cov to said annular portions and for promoting swing ering in a forward and 'rearward direction by 25 ing movement of the leg coverings in said direc limiting flexure of said hip covering to said an tion by limiting tlexure of said hip coverings to nular portions, and means at said hip covering said annular portions. parts of said annular por ' for restraining longitudine l separatingmovement tions bulging to a lesser extent than other parts of said torso and said leg coverings and for pro thereof during said swinging'movement of the’leg 30 moting flexure of said hip covering at substan coverings, and means at- the inner and outer re tially the pivotal axis of the hip of the wearer. gions of each of said leg coverings and extending 6. An inflatable suit comprising a torso cover ing of flexible wall material, a pair »of leg cover ings each including an upper part of flexible wall material, each said upper part having a lower . margin and cOmDl‘ ising a hip covering comprising a series of outwardly bulged substantially annu from said torso covering to each said lower mar gin of said hip coverings for restraining longitu dinal separating movement of said torso cover-. ing and said leg coverings and for promoting flex ure of said hip coverings at substantially 'the piv otal axis of the hips of the wearer. ' lar portions tapering from the outer region of 8. An inilatable suit comprising a torso cover-~ the hip to the inner region thereof at the central ing of flexible wall material and 'a pair of leg cov junction of the leg covering and the torso cov 40 erings of flexible wall material arranged to assume ering, band _elements of flexible material disposed ’ ' under inflation conditions a, position interme circumferentially between adjacent annular por« diate a position at right yangles to said torso cov tions for restricting outward bulging of'sald hip ering and 'a position along the longitudinal axis covering to said annular portions and for pro 45' of said torso covering, , each said leg covering moting swinging movement of the leg covering in comprising an upper part having a lower margin. a forward and rearward direction by limiting flex- ‘ a lower part and a flexible joint intermediate ` ure of said hip covering to said annular portions, said upper and lower parts and detachably se and means for restraining longitudinal separat cured to said'lower margin for providing relative ing movement of said leg coverings and said torso 50 swinging movement in a forward and rearward covering, said means comprising a strap element direction between the latter said parts, said up of flexible material extending continuously along per part including a hip covering comprising a said upper parts of the leg coverings inside said series of- outwardly bulged substantially annular suit at the inner region of said leg coverings and portions tapering >from the outer region of the extending between the respective said lower mar 55 hip to theinner region thereof at the central gins of said upper parts, said str'ap element being ' junction of the leg covering and the torso cov in sliding engagement with said wail material at ering, band elements of flexible material disposed substantially the central junction of said leg cov circumferentially between adjacent annular p0r erings and said torso covering for permitting ad tions for restricting outward bulging of said hip Justing the length of said upper parts during do covering to said annulan portions and for prof swinging movement of said leg coverings in said moting swinging movement ofthe legcoverlng in v direction and said means comprising a. pair of said directionby limiting flexure of said hip cov- t members, each said tension ' compensating tension eringto4 said annular portions, and means ex member being disposed inside said suit at the tending from said torso covering to said lower outer region of each of said leg coverings and 65 margins along sai-l hip coverings for restraining extending from said torso covering to said lower longitudinal separating movement of said torso margin of said upper part of the leg covering and said leg coverings and for promoting _ilex along said hip covering and each said tension ure of said hip coverings at substantially thev member comprising strip elements of flexible ma pivotal axis of the hips of the wearer, said ilex terial _arranged in a forked arrangement, . the 70 lble joint comprising a tubular member compris junction of which being positioned at substantially ing flexible >material having 'substantial fullness the pivotal axis of the hip of the wearer and the at spaced-apart positions along said member in remote ends of said strip elements being secured opposite front and back portions in the direction ' to said torso covering and said lower margin of . of forward and rearward swinging movement to said upper part whereby said strip elements co 75 provide a series _of outward bulges in said oppo operate in withstanding the tension load 'under 2,410,632 « i7 ^ site- portions and,> having >sidewall portions ex tending longitudinally »along side regions of said tubular member~ coextensive lwith> the front and back bulged portions and between -and intercon necting such bulged portions and _being of lesser ' 18 said element having a bearing race adjacent and in register with the first said bearing race and having a. depression in a face thereof opposite the second said bearing race, and rotatable ele ments disposed in 'said bearing races for securing fullness as compared to said: ulged portions to said »ring element to-said sleeve structure and for promotev swinging movement` adjacent parts lproviding relative full-circle rotation between _ of the leg covering in said dir ' ‘nib'yiiexure of said ring element and said structure, a second said series of bulged portions ¿over? a substantial sleeve structure secured to the other of said parts> - extent of said leg covering `while‘lateral compact and being in telescopic engagement at said exten ness of the joint is maintained zunderiniiation of sion and in overlapping .relation with the first said the suit and joint, means restraining longitudinal sleeve structure and having a depression >in a separating movement of the ‘ad-jacent;v parts of ' face thereof adjacent the opposite face of said the leg covering and restraining' outwardl bulging element and in register with the ñrst said depres ofjsaid sidewall portions, and- adetachableiffcon 15 sion, expansible-contractible ring means disposed nector structure interconnecting saidiuxtubular in said depressions between said ring element and member to said lower -marginof said upper .part said second sleeve structure and adapted to be of the leg covering. _ ¿_ » ' ` ` 9. A flexible joint for connecting adjacentlparts of a limb covering of an'inilatable high-altitude 20 suit for maintaining the wearerv under air-pres-sure substantially greater than the surrounding air pressure while providing for relative swing-. ing movement of said parts forwardly and-rear . wardly, said joint comprising a tubular member 25 comprising flexible material having substantial fullness at spaced-apart positions along said member in opposite front and back portions in the direction oi.’ forward and rearward _swinging contracted inwardly relative to said sleeve struc- ' tures Afordetachably engaging said structures, andsealing means between said structures at said extension. l1. A flexible joint for connecting adjacent parts of an inflatable- high-altitude suit for main taining the wearer under air pressure substan tially greater than the surrounding air pressure while providing for relative swingingmovement of said parts forwardly and rearwardly, said joint comprising a tubular member comprising flexible material having substantial fullness at Yspaced- y movement to provide a series of outward vbiilges apart' positions along said member in opposite in said opposite portions, said bulges being -con 30 front`> andback portions in the direction of for- » tiguous with one another in each of said .opposite ward and rearward swinging movement to pro portions, and said tubular member'- having side -vide a _series of outward bulges in the front and wall portions extending longitudinally along side back portions, said bulges being contiguous with regions of said member coextensive with the front one another in each of said front and back por and back bulged portions and between and in ' tions, _and said tubular member having sidewall terconnecting such bulged portions andV being of portions extending longitudinally along side lesser fullness as compared to said bulged portions to promote swinging movement of said adjacent ' parts in said direction by ilexure of said series of bulged portions over a substantial extent of said covering while lateral compactness of the ~ - e regions of said member coextensive with the front and back bulged portions and between and inter 40 connecting such bulged portions and being of lesser fullness and substantially restrained- .. against loutward bulging as compared to said joint is maintained under inflation of the suit and bulged portions to promote swinging movement joint, band elements of flexible material disposed of said adjacent parts in said direction by fiexure circumferentially between adjacent bulged por 45 of said series of bulged portions while lateral com .tions for restricting bulging of said member to pactness of the joint is maintained under infia said -bulged portions'and for restraining -outward tion of the suit and joint, said side walls restrain bulging of said sidewall portions, flexible hinge ing longitudinal separating movement of said structures including ring elements attached to adjacent parts. " ’ said sidewall portions between said band elements 50 12. A flexible joint for connecting adjacentV at substantiallyv thev respective central regionsl parts of an inflatable high-altitude suit for main longitudinally of said sidewall portions and op taining the wearer under air pressure substan positely disposed along said tubular member at a tially greater than the surrounding air pressure determinate distance from the longitudinal axis while providing for relative swinging movement of said tubular member, and tension elements of 55 of said parts forwardly and rearwardly, said joint ñexible material for restraining longitudinal sep comprising a tubular member comprising ilexible aratingl movement of said adjacent parts and for material having substantial fullness at spaced restraining outward bulging of said sidewall por apart positions along said member in opposite tions, said tension elements extending along said tubular member through said ring elements at 60. front and back portions in the direction of for _ and spaced from said sidewall .portions for per mitting flexing of said hinge structures-duringÍ said swinging movemenasaid tubular member tending to assume a bent position under inflation ward and rearward swinging movement to provide Y a-series of outward bulges in the front and back portions, said bulges being-contiguous with one another in each of said front and back portions, and said tubular member having sidewall por conditions by virtue of the arrangement and co,- 65 tions extending longitudinally along side regions operation of said hinge structures and said ten sion elements. ` " l 10. A joint for connecting adjacent parts of an of said member coextensive with the front and back bulged portions and between and intercon necting such bulged portions and being of lesser inflatable suit for relative rotating movement of ‘ fullness and substantially restrained against out said parts, said joint comprising a sleeve structure 70 ward bulging as compared to said bulgedliiortions` secured to one of said parts and including a to promote swinging movement of said adjacent bearing race at a, face thereof and intermediate parts in said direction by ñexure of said series of the ends of said structure providing an extension bulged portions while lateral compactness of the thereof and including a ring element mounted joint is maintained under inflation. of‘the suit at said face and overlapping saidl bearing race, and joint, and -means including restraining 2,410,632 means at said sidewall portions for restraining. longitudinal separating movement of said ad -iacent parts and 'outward bulging of said sidewall portions and for coniinlng bulging of said mem “ber to said bulged portions. 13, A nexime Joint for connecting adjacent ` parts of an inflatable high-altitude suit for main baciâ bulged portions and between and intercon necting such bulged portions and being'of lesser fullness and substantially restrained against out ward bulging as compared to said bulged portions to promote swinging movement of said adjacent parts in said direction by nexure of said series of bulged portions while lateral compactness of the ` joint is maintained under inflation of the suit and taining the wearer under air pressure substan joint, band elementsy of flexible material disposed tially greater than the surrounding air pressure while providing for relative swinging- movement 10 circumferentiaily of said tubular member between adjacent bulged portions tor confining bulging of of said parts forwardly and rearwardly, said joint Y said member to said bulged portions and for re comprising a tubular member comprising ilexible straining outward bulgingv of said sidewall por material having substantial fullness at spaced tions. and strip elements of ilexible material ex apart positions along said member in opposite tending along said tubuiar member at said side front and back portions in the direction ot for wall portions and secured directly thereto for ward and rearward swinging movement to provide restraining longitudinal separating movement oi a-series of outward bulges in the front and back said adjacent parts and for additionally restrain portions, said bulges being contiguous with one ing outward bulging of said sidewall portions. « another in each of said front `and back portions, RUSSELL S. COLLEY. and said tubular member having' sidewall por 20 CARROLL P. KRUPP. tions extending longitudinally along side regions v of said member coextensive with the front and DONALD H. SHOCK. Certificate of Correction Patent N o. 2,410,632. November 5, 1946. RUSSELL S. COLLEY ET AL. It is hereby certified that errors appear in the printed specification of the above numbered patent requiring correction as follows: Column 14, line 7, claim 2, for “increasing” read incasing; column 15, line 22, claim 5, for “restraining” read restrict ing; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the oase in the Patent Office. Signed and sealed this 18th day of March, A. D. 1947. [mL] LESLIE FRAZER., First Assistant C'ommissioneiI of Patents.