PatentedjJeni 7, 194? ~ ul'rs s‘m'rss PATENT, oasis 2,413,840 ‘ PIPE COUPLING - Jean Mercler, New York, N. Y. Application May 24, 1944, SerialNo. smote 2 (Claims. , (Cl. 285-123) l . coupling. - internally threaded end portion, which engages the thread of the end portion 2a of the pipe 22. Said collar 3 is provided with a plurality of tiles One of the objects of my invention is to provide a coupling which comprises respective pipe mem bars, or a pipe member and a coupling head, which are connected so as to provide a leak tisht joint. 2 The member 2 has a thick and substantially non» deformable wall. A collar 3 is provided with. an My invention relates to a new and improved or grooves ill, by means of which said collar 3 can be screwed into position by means of a pipe wrench, with considerable force. The d is rigid and it is provided with a trustee epic ternal wall to. The angle of wall .r'ith th . Another object is to provide a coupling wherein ‘the connected pipe members are held securely 10' against considerable longitudinal force. longitudinal axis of the tube 9 is Another ohject of my invention is to provide an improved coupling, . whose wall is t“ or to co rigid if . ring t is made of hard metal. so connecting a tube and deformable, to another ahead which has a thicln and Irma-hie wall. ’ ' ~ order wall istodeformed bite into the by enlarging wall of ti Said pipe i may he s 15 of pipe l. dither closets to provide a coupling which he disassemhled without deforming the thin walled tube; to maintain the sealing members in sealing condition upon the thln=walled tu‘ce when it is uncoupled ‘from the coupling-head or other tube; to provide a coupling which will be resistant to vibration; and to provide :1, coupling which has three longitudinal seetions, one section taking up ‘ of brass or other alloy which is s material of the ring 6. The waif. o The ' can be made of ‘any material. ' ‘i is made of copper, lead, other suitable material which cap under high pressure. Said gasket . longitudinally split end portion a longitudinal portion ‘lo. the slits.ring ‘5 may have one o}; vibration, a second section being a sealing sec» tion, a third section holding the coupled parts 25 abuts .Tne the ringcorresponding 3 has a frusto=conlcal frustowconieal well do1' - - against outward longitudinal movement. ‘ Other objects oi my invention will he stated in the annexed description and drawing which illustrate preferred embodiments thereof. Fig. l is a longitudinal sectional view which illustrates one embodiment of my invention. This of the‘ split end portion ‘la. The an. . abutting end-walls with the common longitudinal axis of members i and 2, is oozes“. Adjacent the frusto-conical Wall to of the rims the gasket so ring 7 may initially be iormed with a itustc conical wall which initially abuts rtmsto~ illustrates. a part of the coupling head 2. conical wall to. If desired, the initial shape of Figs. 2 and 3 are respective longitudinal sec the continuous body of the ring l, at the right tional views which illustrate respective dl?erent the split end portion lot, can be cylindrical. ‘ embodiments oi’ my invention. The coupling 35 of In such case, the gasket ring l will be ?nally do» head '2 is symmetrical and a pipe line of any length can be secured by connecting a series of . formed into the shape shown in Fig. l; by its»; tubes and coupling-heads. Without limiting the ?eld of use of the lnven“ _ longitudinal pressure which is exerted by the clamping collar s. tion, it is particularly intended for use in con 40 The pipe 2 is formed with a frusto-conical seat S, and in the assembled coupling, a portion of the meeting the pipes of a pipe line or system, which ring 6 abuts said frusto-conlcal seat S. is used to transmit liquids under high pressure, In order to complete the coupling between the such as a pressure of spoons. per square inch pipes l and 2, said pipes are assembled while the or more. Such pipe systems are used extensively in the hydraulic control-systems of airplanes, and US pipe 1 is in its initial cylindrical shape. The rings 8 and ‘I are assembled between the pipe i and the for other purposes. clamping collar 3. When the clamping collar 3 Fig. 1 shows a thin-walled pipe 5 and a pipe is tightened by screwing the same upon the thread or coupling-head 2. The inner end 5 of the pipe I is initially of cylindrical contour, and of the of the end portion 2a, the gasket ring l is de same diameter as the body of the pipe i. As an 60 formed and compressed, so that it forms a ?uid example, the wall of the thin-walled pipe or tube I can be of stainless steel, whose thickness is one millimeter. The internal dlameter‘of such tube I is ten millimeters. The pipe or coupling-head 2 is provided with a threaded end portion 2a. tight seal. ' , The slitted portion of the gasket ring ‘7 absorbs all vibration, so that the unslitted sealing portion of gasket ring ‘l is not a?ected- by vibration. This is particularly important if the tube ! has 2,413,840 4 a thin an i easily deformable wall. In such case, reference numeral 6b, and in Fig.‘ 2, the biting edge of the hard ring 8 is designated by the ref the tube i will break at the sealing portion of the gasket ring, where a maximum stress exists, un erence numeral 8a. _ less the vibration is suiiiciently absorbed in a part Fig. 3 shows a biting ring it, which has a of the gasket ring which is spaced from its seal 5 biting edge llla. Fig. 3 also shows a gasket ring ing portion. II, made of lead or other material which can be deformed under high pressure, and shaped differ As an example, in using the above-mentioned thin-walled stainless steel tube, the total length of the gasket ring I is about twelve millimeters, ently from the gasket ring ‘I of Figs. 1 and 2. The biting ring It is provided with an annular recess, adjacent its biting edge Ma. The assembly of that is, slightly in excess of the internal diameter of the tube i. In such illustrative example, the the embodiment of Fig. 3 is the same as above gasket , ring ‘I is made of Duralumin, and’ the ‘ described. length ‘of the slitted part ‘la is four millimeters. I have disclosed preferred embodiments of my Fig. 1 shows the parts of the device in their ?nal invention, but it is clear that numerous changes assembled position. In such position, the edge 15 and omissions and additions can be made without 6b of the collar 5 which is close to or which abuts departing from its scope. The invention also cov— the ?ared external wall of the pipe 9, bites into ers sub-combinations of the‘ complete combina~ said external wall, thus providing’ a strong me tions disclosed herein. ' chanical connection between the collar 5 and the For convenience, pipe 2 is designated as the ' pipe i. After the collar 3 has been tightened into 20 outer pipe, and pipe l is designated as the inner its ?nal position, a suitable tool can be introduced pipe, and collar 5 is designated as the holding through the pipe 2, in order to enlarge the end 1 collar. The portion of pipe 8 which is located portion 5 of» the pipe I. ‘This enlargement of said inwardly of clamping collar 3, is designated as its end portion 5 bends the material of the wall of coupling-portion. As shown in Fig. 2, the inven the pipe i along a continuous transverse circular 25 tion is not limited to the type of coupling in which line, at the edge 5b of the collar e. The edge 6?) part of one pipe is located inwardly of the asso then bites into the material of the pipe I, and this ciated pipe. _ connection, together with the enlarged ?ared In each embodiment, the holding collar abuts shape of the end-portion 5, acts as a positive stop, the outer wall of said coupling-portion, between to prevent the pipe I from being forced longitu 30 the tip of the transversely enlarged end-portion dinally out or assembled position, by the pressure 5 and the other end of inner pipe I . of the ?uid or other longitudinal force. That is, when the parts are assembled and tightened as . The invention is not limited to a transversely continuous holding collar, or to a transversely continuous gasket collar, or to a transversely con-. shown in Fig. l, the frusto-conical wall 3a and the abutting end-wall of the split end-portion ‘Ia, prevent the gasket ring from being'forced longi tudinally outwardly from the collar 3. Since the 35 tinuous enlargement 5. gasket ring ‘I is made of copper or lead or alu relative to the pipes. v - In one aspect of my invention, the member. 6 or 8 .or I II is a holding member which is held ?xed ' _ minum alloy, which is deformed only under high The pipe I has a transverse member, namely, pressure, said gasket ring acts as a stop to prevent 40 the enlargement 5 or other means, which hold said the rigid collar 6 from being forced longitudinally pipe I relative to an end-face of said holding to the left of its assembled position.‘ The trans- ' member 6 or 8 or III, to prevent said pipe I from verse enlargement of the coupling end-portion 5 being longitudinally displaced under the pressure of pipe I begins directly at edge db or closely ad of ?uid, gaseous or liquid, in the pipe line. jacent thereto. This applies to the other embodi-' 45 In Figs. 1 and 2, the maximum transverse di ments. a'meter of enlargement 5 exceeds the internal di I thus provide three main mechanical fun'c-' ameter of pipe 2. In Fig. 3, the internal diame tions, at longitudinally spaced respective parts at ter of pipe 2 exceeds the maximum transverse the coupling. The vibration is absorbed, ‘either diameter of enlargement 5. Hence, in the em: wholly or in major part, at the portion ‘la. The‘ bodiment of Fig. 3, the pipe I may be deformed or sealing e?ect and possibly the absorption of some it may be shaped initially with the enlargement of the vibration, are produced at the unslitted part 5, prior to assembling the parts of the joint or of gasket ring ‘I. The longitudinal mechanism coupling. The collar 3 can hold the holding col . holding elfect is produced at the edge 6b of the lar or member directly in ?xed position, or collar 6, so that no longitudinal force, or at least 55 no objectionable longitudinal 'force, is imposed upon the gasket ring ‘I. In the embodiment of Fig. 2, the pipe ,2 is pro vided with a frusto-conical seat S, the direction through the member ‘I. ‘ ' ' . As an example, when the collar 3 is unscrewed, in the embodiment of Fig. 1, the collar 6 and the gasket ring ‘I remain assembled as a sub-unit with the pipe I. Due to the small angle of wall 611 with ' of whose taper is opposite to the direction of taper 60 the axial direction, the gasket ring ‘I is held in of said seat S in Fig. 1. The ring 6 is replaced by sealing position, without creeping or slipping from said sealing position. After the coupling ’ has been disassembled, it can be re-assemblecl, all located. This provides additional resistance without imposing objectionable stress upon the against longitudinal separation between the pipes 65 thin-walled tube. The same advantages speci?ed a ring 8 which has an annular circumferential groove 9 in which the enlarged end portion 5 is I and 2. : In the embodiment of Fig. 2, the collar 3 has ' herein apply to all the embodiments. 'In Fig. 2, I prefer that the diameter ‘of the wall portion 8b of the collar 8, should be slightly less common longitudinal axis of the pipes I and 2. than the normal external diameter of the cylin This abutting end-wall of the collar 3 abuts a cor 70 drical part of tubecl, and greater than the nor responding end-wall of the slitted portion ‘Ia of mal internal diameter of said tube I. ' the gasket ring I. For convenience, the member 2 may be desig The assembly of the embodiment of Fig. 2 is nated as a pipe or as a pipe-member, in de?ning the same as the assembly of Fig. 1. In Fig. 1, the invention in one ‘or more claims, since member the biting edge of the collar 6 is designated by the 75 2 may be a pipe or a coupling head. an annular end-wall which is perpendicular to the 2,418,840 I claim: 5 . 1. A pipe-coupling which comprises a pipe and a pipe-member which is assembled with said pipe, an outer rigid collar which is longitudinally mov able relative to said pipe and said pipe-member, means operative to hold said outer collar ?xed to‘ said pipe-member, an inner rigid collar' located intermediate said outer collar and the outer wall of said pipe, said inner collar abutting the outer wall of said pipe at only a single edge of said inner 2. In combination with an outer pipe and an inner pipe, av coupling-part of said inner pipe be ing located in said outer pipe, the end-portion of said coupling-part having a transverse enlarge-' merit, a rigid clamping collar, said outer pipe hav ing an external thread, said clamping collar hav ing an internal thread which engages said exte'r- ' nal thread, said clamping collar surrounding said coupling-part, a rigid holding collar which ?ts substantially snugly in said clamping collar, said collar, said pipe having an enlargement adjacent said edge, said enlargement being located to op pose the longitudinal movement of said pipe away from said pipe-member, said inner collar having a rigid holding collar abutting the outer wall of said inner pipe only at the end of said holding collar which is adjacent said enlargement, a gasket col being spaced longitudinally from said inner col said gasket collar, said gasket collar and said lar which has an outer wall which abuts the inner wall which abuts a Wall of said pipe-member, a 15 wall of said holding collar, said‘ gasket collar also 'gasket, a part of said gasket being located inter having an inner wall which abuts the outer wall of said inner pipe, said clamping collar having a mediate and abutting said inner collarxand said outer wall of said pipe, another part of said gasket transverse wall which abuts a transverse wall of .lar in a direction away from said pipe-member, 20 holding collar being located longitudinally be said outer collar having a transverse wall which tween said abutting transverse walls and said en abuts a transverse wall of said other part of said largement, said end-wall of said outer pipe be; gasket, said outer collar longitudinally forcing said inner collar and said gasket towards said pipe-member when said outer collar is moved lon gitudinally towards said pipe-member, said outer collar holding said abutting walls of said inner collar and of said pipe-member in abutting rela tion, said other part of said gasket being more easily compressible than the ?rst-mentioned part 30 of said gasket. - ' ing located longitudinally between said transverse enlargement and the end of said holding collar which is adjacent said enlargement, said clamp ing collar holding said gasket collar under longi tudinal pressure. ' -' JEAN MERCIER.