Патент USA US2403436код для вставки
July 9, 1946. 2,403,436 H. E. HEIGIS INFLATION DEVICE Filed Sept. 50, 1941 2 Sheets-Sheet l INVENTOR ‘ W. E z . ATTORNEY 2 Patentedjuiy 9, -. 2,403,443’ : UNITED STATES PATENT orrics ’ INFLATION DEVICE Henry Ernest Heigls, West Orange, N. J ., assignor to Specialties Development Corporation, Bloom ?eld, N. .L, a corporation of New Jersey ’ ’_.Application September'30, ‘1941, Serial No.,4l2,928 - 4 Claims. (Cl. 137-695) 2 1 The present invention has reference to an ap-. paratus for use with pneumatic and analogous devices that are to be in?ated?or charged with a ?uid pressure medium to a predetermined degree of pressure, and which is designed‘ to prevent the establishment of excessive pressure within such devices when in?ation or charging is taking place. an improved in?ating valve for pneumatic de ~ vices of the type described. ~ > It is a further object of the invention to pro , vide an in?ating valve which permits the in flation of low pressure pneumatic devices from high pressure sources. . charging valve to be used with containers or en-_ More particularly, it is an object to provide an inflation, valve which has~.a‘seat-type vent valve for the prevention of ‘pressures within the velopes, rigid or otherwise. _ in?ated device beyond a given safe. value. , More speci?cally, this invention relates to a ' The invention, in this instance, will be described in connection with a so-called life-raft for air craft; it will be understood, however, that this is by way of illustration ‘only, since the device is equally well adaptable to any other container having a limited pressure capacity, for example, an airplane fuel tank which'is to be evacuated and used for ?otation purposes, as suggested in It‘is another object to provide a valve as re ferred to, in which the vent valve is ordinarily held securely seated by a force larger than that . - at which it is adapted to vent the pressure me-> dium, receiving device during charging. . - It is a still further-“object to provide in an in . flation valve as indicated, a vent valve which is automatically made operative during inflation, and which is otherwise held securely seated un Letters Patent of the United States No. 2,200,922. Life-rafts, adduced here for illustration, that 20 der non-in?ation conditions. These and other objects not specifically enu , is, of the type used on aircraft for emergency I landings on water, ordinarily comprise a rub-~ berized or rubber fabric envelope forming one or > merated above, will be apparent when described in greater detail in connection with the ac companying drawings, which form a part of the more compartments which, when the use of the life-raft is desired, are given a charge'of-com 25 specification, in which similar characters of ref erence indicate corresponding parts in all the pressed air or high pressure gas. Since such fabrics are not very pressure resistive, their safe - views, and wherein: operating pressure being in the neighborhood of . Figure 12‘ s a top plan view of a life-boat or raft. ' embodying the present invention and showing three pounds per square inch, more or less; and the source of pressure ?uid from which such 30 the manner of assembly ofthe pressure medium source and the in?ation control device. rafts are ‘usually charged, in the case of com Figure 2 is a longitudinal cross-sectional view pressed air, delivers at a pressure of one-hundred of a portion of the life-boat taken on the line pounds per square inch; and in the‘ case of a 2-2 of Figure ;l. viewed in the direction of. the compressed gas, such as carbon dioxide, even very much higher; it becomes necessary and desirable 35 arrows, and showing an upper and a lower in ?atable compartment. . ' to limit the pressure within said pneumatic com partments to a maximum safe value as stated Figure 3 is an elevational view of a section of above. ‘It would seem, that ordinary vent valves the in?ating device shown in Figure 1, taken on would answer the purpose of such a, contingency; the line 3—3 and viewed in the direction of‘ the However, it has been found that vent valves de-' 40 arrows, as indicated in Figure 4. ' - _ signed to operate under suchlow pressures as Figure 4 is an enlarged top plan of two in?at would prevent the raft from bursting, are seated ing devices, applied to the two compartments of so lightly as to be a source of continued leakage the raft of Figure 1. , from the raft. I A light-seating vent valve of this type, would also very frequently be unable to 45 Referring now to Figures 1 and ,2, the reference i indicates . the in?atable rim of the in?atable seat properly due to the presence of even minute life-boat,‘ the rim consisting of individually but particles of foreign matter. . simultaneously in?atable upper and lower com e above, of course, holds equally truepf rigid cont ‘ners of low pressure capacity. partments 2 and 3, respectively, this arrangement . It is therefore an object of this invention to 50 of compartments enabling the boat to retain its origina1 shape in the event that either one or the ' provide ‘an in?ating or charging valve for low other of the compartments be punctured and de pressure resistive type envelopes or containers which overcomes these objections and disadvan- ' tages. . l flated. The bottom of the boat is represented at 4, the oar-locks at I, and the seats at 6; the It is also an object of this invention to-provide B8 seats being separately in?atable through‘ suitable. 2,403,436 3 4 connections at ‘I. At 8 is shown a pressure me dium storage container secured to the raft struc ' The release means communicates by and thereby to valve 36. A valve cap 53, which is provided with a plurality of openings 54, se cured over valve seat member 35 adjacent vent valve 36, offers mechanical protection for the vent way of a connecting hose ID with a distributing valve and. an outlet for any ?uid medium vented manifold I I, which is coupled to the in?ating de vices l2 and I3 secured to the fabric of the life there-through. ture, and provided with pressure medium release means 9. ' raft by means of elastic ?anges l4 and I5. Devices l2 and [3 are of identical construc . Referring to Figure 4, the in?ating devices I 2 and I3 are connected to the manifold connector 2|, which communicates with ?uid pressure sup tion, each serving one compartment, and will now 10 ply hose lll by means of coupling 55. Coupling 55 is provided with an alternative connection 56, be described with reference to Figure 3. The substantially circular ?ange H, which is which is ordinarily closed by a cap 51, and which‘, when desired, enables an outside ?uid pressure , preferably made of some material such as rub supply to be connected into the manifold through ber or the like, is fastened over an in?ating aper- ‘ ture l6 formed in the fabric of the rim, while a 15 a Schrader-type in?ating valve contained therein protecting apertured piece of fabric I‘l covers the upper surface of said ?ange and the adjacent portions of the raft fabric, the ?ange being suit ably cemented to both the raft and the protecting and not shown in the drawings. Pressure gages 53 are connected into valve body 59 to provide visible indications for the control of the pressure within the raft compartments. When it becomes necessary to in?ate the life fabric. The supporting ?ange M carries in an 20 raft described, the proper manipulation of re opening in its body, which corresponds to aper lease means 3 of the fluid pressure storage con ture 56 in the raft fabric, a lower portion Iii of tainer 3, which, may be a liquid carbon dioxide ‘the in?ating valve body it. Said lowerportion container, liberates ?uid medium under consider 53 comprises a tubular formation shaped to pro able pressure, anywhere up to one thousand vide a close ?t with said aperture of the rubber' pounds per square inch, approximately, into the ?ange, into which it is securely fastened. The hose Iii and toward manifold connector 2 i. Here, main valve body [9 is formed with an inlet) 20 the ?uid ?ow divides, and the pressure of the adapted for threaded connection to the manifold incomingimedium raises the spring seated valve connector 2! . A main valve chamber 22 is formed adjacent to the inlet, and communicates there 30 member‘ 22, initially against the resistance of the coiled spring 28, and practically at the same time, with by a passage 23. A valve seat 24 is formed taking up the resistance of spring 46 through about said passage, which is ordinarily closed off ‘ the medium of piston assembly at, which is pro by a check valve 25. The check valve includes a pelled to act against spring support 53. There sealing member 25 supported by a member 21, upon the medium passes through passage 3| and and is held against seat 24 by means of spring nozzle 32 into the compartment 2, a similar pro 28, disposed in a recess 29 of the member 27 and cedure taking place with respect to compartment bearing with its ‘other end against a piston as 3. The in?atable compartments 2 and 3 have, sembly 30, slidably disposed in valve chamber‘ of course, a considerably larger volume than the .22. a passage 3! in the body i9 connects valve chamber 22 with the inside of the raft compart 40 pressure medium container 3. The pressure me dium, therefore, expands and fills the compart ment 2 by way of a restricted flow‘.v nozzle 32 dis ments at a suitable pressure, considerably lower' posed in a suitable recess "of the body l9 and than that originally found in the container 3, passage 3|‘. A baffle 33 is secured into the tubular the rate of ?ow being governed by nozzle 32. opening of support l8 opposite nozzle 32, to di However, as soon as such in?ating pressure with rect the incoming ?uid straight down into the in the compartment reaches a value which is compartment 2 to prevent possible damage to the higher than the predetermined force with which fabric, which may result from a high velocity spring 42 acts to hold vent valve 36 against its ?uid medium discharging through the obliquely seat,- the seating force of spring 46 having been disposed passage 3|. The valve body I9 is en neutralized by the direct action of the in?ating larged and apertured at 34, and carries threadedly pressure on inlet valve 22 and piston assembly secured to it at that point a vent valve seat 35. 30; the vent ‘valve_3S, being subject to the pres A vent valve 36, comprising a sealing disc 37, a sure within the compartment through the tubu supporting disc 38, and a valve stem~39, serves to lar opening in support it, will be unseated, and provide a closure for the opening 40 in valve seat cause an immediate reduction in the compart 35. Valve stem 33, which is securely fastened into ment pressure. Immediately upon the cessation supporting disc 38, extends centrally of the body of the in?ating pressure within inlet 2d, spring l9 into a recess 4| of the piston assembly 30, and‘ 46 acting on the piston assembly i-lii, and spring carries telescoped about it a light spring 42, bears 28 acting directly upon inlet valve 22, will effect ing with its one end against a collar 43, which is a seating thereof, and at the same time permit held in place by means of a cotter pin 44. passing the full force of spring 46 to bear against spring through the stem. The other end of the spring support 49, valve stem 39,‘ and thereby on vent 42 abutsagainst a collar Bil carried loosely by valve 36. the stem 39, and which, in turn, bears against a It will be apparent from the above that during spider formation 45, in opening 40 of the valve ' seat 35. In addition to the seating force of 65 the inflation, the vent'valve is seated only with the force of the light spring #2, calibrated to the spring 42, valve 36 is held onto its seat by a strong safe compartment pressure of approximately spring 46, hearing ‘against a shoulder 41 formed three pounds per square inch, while at a time on the valve'seat member, and telescoped about an extension 48 thereof. The other end of spring when ‘no in?ation is taken place, the vent valve 46 is carried by the disc-shaped spring support 70 is held seated by the far larger force of spring 49. Support 49 bears against the recessed por 46 in addition to that of spring 652. This ar rangement insures an absolutely leak-proof vent tion 50 of piston assembly 30. A cotter pin Si in stem 39, and aspider formation 52 in the spring valve in accordance with the objects set forth support 49, cooperate to provide appoint of ap above. plication for the force of spring 46 to stem 39, 75 The de?ation of the life-raft compartments 2,403,430 5 6 . may be accomplished by the opening of suitable de?ating valves or cocks 5!, shown in Figure 1. From the foregoing description‘ in connection - with the accompanying drawings, it will be seen that I have provided an in?ation device which incorporates the objects set forth initially, and pressure medium; a venting valve normally close ing said venting outlet means; spring means urg ing said venting valve towards its closing posi tionv with a. force adapted to be overcome when . the pressure in the venting outlet ‘means exceeds a predetermined pressure; second spring means aiding to maintain said venting valve in its closed which will be recognized to constitute a decided position with a force greater than said-predeter- ‘ improvement over prior devices of this character. mined pressure; and ?uid pressure operable pis ‘It will also be seen from the character of the ton means associated with said inlet means adapt device illustrated, that the principles of coned to render said second spring means ineifective struction of the present invention are broadly during the introduction of pressure medium applicable to various types of pressure medium through said inlet means. receiving devices; so that, while the invention 3. A valve comprising casing means having an has been described with reference to the accom panying drawings, I do not wish it to be limited 15 inlet, a restricted outlet communicating with the inlet, a vent, closure means for said vent, piston save as de?ned in the appended claims. and valve means constructed and arranged to cooperate with each other in response to ?uid i. For use with a pressure medium receiving pressure at said inlet for opening by said valve device comprising an envelope adapted to with means of ?uid communication between said inlet stand a predetermined degree of pressure, a maxi and said outlet and for movement of said piston, mum pressure safety in?ating device comprising releasable holding means cooperating with said a casing; an inlet for said casing formed with a closure means and said piston, and spring means chamber; an in?ating valve in said chamber nor normally operating on said closure means mally seated in said inlet; a restricted in?ating ?uid outlet; a venting outlet in said casing; a 25 through said holding means for biasing said- clo sure means closed, said piston movement operat venting inlet in communication with said venting ing to release said holding means‘and to nullify ' outlet; ?uid ?ow conducting meansffrmn said said bias. > ‘ i chamber to said in?ating ?uid outlet; a venting 4. A valve for ?lling a container with a ?uid valve normally closing said venting outlet; spring means urging said venting valve toward its clos 30 medium to a predetermined pressure, comprising casing means having an inlet, a restricted outlet lng position; second spring means aiding the ac for passing the medium from the inlet, a vent tion of said first spring means;-and a ?uid pres for the casing means, valve ‘means for closing sure operable piston in said valve chamber/op said vent, means for biasing said valve means eratively associated with said second spring means adapted to be acted upon by the pressure of the 35 closed with a predetermined pressure, additional means normally biasing said valve means closed‘ in?ating ?uid‘ upon opening of said in?ating with a force higher than said predetermined valve whereby said second spring means is ren pressure, and ‘means operative upon high pres dered ineifective. ‘ 'sure in said inlet for nullifying the e?ect of said 2. A valve assembly for utilization in conjunc additional biasing means. 40 tion’ with a pressure medium receiving device, I claim: > , ~ - comprising easing means having inlet means‘ for pressure medium; venting outlet means for said HENRY ERNEST HEIGIS.