D6324» 1946- LE ROY VAUGHT 2,413,089 FITTING Filed July 10, 1944 Fm] ' ‘ ‘ 3/ v f 7? 2/ INVENATOR. ,BY gaff JMW ATTORNEY Patented Dec. 24, 1946 21,413,089 UNITED STATES PATIENT OFF-ICE FITTING _ Le Roy Vaught, Inglewood, Calif;, assignor of one half to Roy W. Solomon, Inglewood, Calif. Application July 10, 1944, Serial No. 544,155 1 Claim. (Cl. 285—86) 2 My invention relates to a means for producing an effective seal in transmitting lines used in , . r ,7 arrangement of parts ‘which will appear more fully in the course of the following description. the arts and industries for delivering ?uids under However, the drawing merely shows and the fol high pressure. In the aeronautical ?eld espe lowing description merely describes embodiments cially, it is of the greatest importance that ?uid Or of the invention which are given by way of illus tight and leak-proof connections be available, tration, or example only. that they be maintained at all times and under In the drawing, like reference characters desig-r the various and severe conditions in which planes nate similar parts in the several views. must operate and be handled, and that they be Fig. 1 is a sectional elevational View showing capable of withstanding extreme pressures with 10 an embodiment of my invention. out subjecting the connections to high torque Fig. 2 is a sectional elevation of a sleeve used pressure of a wrench. in the embodiment of my invention. Heretofore it has been customary to use rub Fig. 3 is a sectional elevational view of a modi ber, ?bre, wood, lead or other gaskets and devices ?ed form of embodiment of my invention, and interposed between the elements of a pipe joint 15 Fig. 4 is a sectional view of a sleeve used in the using a union nut to produce a seal and to pre modi?ed form of my invention. vent injury to abutting surfaces by application Referring in particular detail to the drawing, a of pressures that are .too high. But the employ union coupling connection forming the subject of the present invention and constituting the design ment of these aids has not avoided the liability of damage to them when great wrench pressure now most generally followed in aircraft construc is applied, nor has it yielded a satisfactory connec tion, is shown as comprising a tubular conduit l0" tion proof against leaks and capable of with ?tted or provided at one end with an axially bored standing high pressure. Where the ?aring type body ll, having a nut portion 12 at one end, for of tubing is used, the high torque resulting from a wrench or other member, a nose or rounding the use of a wrench to insure a tight connection 25 abutment l3, projecting beyond the other end of has so injured the ?are by rupturing it or crack said body, and external threads I4. An inter ing it or damaging it otherwise that it is unable nally hreaded union nut l5, engages the external to hold pressure and prevent leaks. threads M of said body 1! and by rotation is adjusted relatively .to and on said body ll. The This invention relates to a‘?uid seal or pipe connection in which two associating parts may union nut I5 is provided at one end with an in have a metal to metal contact to insure a‘ seal‘ wardly directed ?ange IS, the inner face of which under very high pressures. The invention is ap is preferably dished or cupped,’ as'seen at A and plicable chie?y to that type of tubing now almost provides a seat for a tubular sleeve or thimble I‘! that ?ts relatively loosely upon or over a conduit generally used in aircraft in which the end to element l8 which is complementary to the said be united in and by a union with a conduit is ?aring. tubular conduit ID with which it is to be associ ated by connective pressure, as will appear later. One of the chief objects of this invention is to provide a simple ?tting in which a seal between The sleeve or thimble i‘! has a radially extend the joint may be effected and the joint tightened ing portion [9, of a diameter greater than the in to a leak-proof pressure with a low wrench torque 40 side diameter of said inwardly directed ?ange l6 and without he use of gaskets or washers. and of greater cross-sectional area than that of its tubular portion, providing thereby a portion Another object of this invention is to provide a simple and e?icient seal for ?uids in pipe or con of increased weight and strength and being there duit connections in which the seal is effected by by reinforced to withstand the pressure imposed a metal to metal contact and in which the seal is upon it. The outer face of the portion 1 9 is proof against rupture or disturbance by internal curved or rounded, as seen at B and conforms pressure and requires no excessive wrench pres to the shape and outline of the dished or cupped sure to associate it in a line. inner face A of the inwardly directed ?ange l6 My invention also has for its objects to provide of the nut l5. The upper or inner face of said such means that are positive in operation, con 50 portion 19 is provided with an annular recess venient in use, easily installed in a working posi I9’ inward from the exterior of said radially ex tion and easily disconnected, economical of manu— tending portion l9, and the upper edge of said por facture, simple and of general superiority and tion I9 is preferably inwardly beveled, as seen at serviceability. ' 20. The invention also comprises novel details an 55 The conduit element of any suitable material 2,413,089 4 3 capable of withstanding high pressures, such as brass, copper, steel, or alloys, and that may readily be ?ared, is formed or provided at one end with a ?are or outwardly spread radially extended tion, none but a true axial alinement of the complementary parts forming the union is pos sible, that they are self seating, and that for this reason, the face to face contact of the metal portion 2|, the outer face of which is shaped to ?t (Ii surfaces is a positive insurance for a perfect seal and a protection against distortive action exactly the recess l9’ in the radially extending portion 19 of the sleeve or thimble and the inner face of which conform as exactly to the outline of a wrench or other member used to combine the associable elements. or contour of the nose or projection I3 of the The modi?ed structure shown in Fig. 3 is in conduit [0. By manipulation of the union nut l5 or by wrench-operation thereof, said nut is adjusted on the body I I and during such adjust form in that the body ll of the tubular conduit ll}, is provided with a conical projection 24, and body H, which, as stated, is part of the tubular 10 all major respects identical with that described ment, the thrust seat A on the inwardly directed ?ange l6, engaging the outer face B of the radi ally extending portion IQ of the thimble or sleeve in connection with Fig. 1. It differs from that that the sleeve or thimble is provided with a radially extending portion which has a tapering ' annular surface 23, that is provided with a re cess 24,. The ‘flare 25 of the conduit element It! ll, moves it, together with the ?ared end 2| of is conical and ?ts exactly into the recess. When the conduit element I8, which is seated in the so seated, the outer face of the flare is ?ush recess l9’, and which flared end is thereby brought into abutting connection with the projection [3 20 with the ‘outer face of the radially extending por tion 19 of the thimble or sleeve H and presents of the tubular conduit [0,. a smooth and uninterrupted face for connection InjFig. 1 it will be noted that the ‘free end abutment with the cone projection of the tubu of the ?are or outwardly extended radial por lar conduit. tion 2] of the conduit element which, as seen, While I have illustrated and described 'what I is in the shape of ‘a spherical concavity, extends beyond the inner line of the bevel '2ll,'in which the portion IQ of the thimble ill, terminates, and that they exterior of the extended ‘portion 22 is parallel‘ with the longitudinal axis vof the conduit Ill and its companionv element 18,. Simi - now regard as the preferable embodiments of my invention, the constructions are of course subject to modi?cation, without departing from the spirit and scope of my invention. I, therefore, 30 do not wish to restrict myself to the particular larly, the corresponding concavity of the tubu - forms of construction illustrated and described, but desire to avail myself of all modi?cations lar sleeve or thimble [1,‘ which receives the flare that may fall within the scope of the appended of. the conduit element :8, is. formed with an internal annular'wall 23, between its concavity claim. and‘its bed/‘616d edge 2,6, and this internal an nular wall 23 correspondswith the external, di ameter oi the extended portion 22 andv provides Having thus described my invention, what I ' claim and, desire to’ secure by Letters Patent is: a perfect" metal to metal ?t and seal therebe prising in combination withanv. internally thread tween, which, is augmented by the‘, extended por tion 22; which under pressure is forced out wardly'the more intimately to engage‘ and aline ed nut having at one. end thereof an inwardly directed ?ange. a tubing associated 'with said " conduit and‘havin'g, a. ?aring, end of greater di with the internal annular wall 23, of. the thimble ajmeter than the inside diameter of said‘ ?ange, ' A union connection, for a tubular conduit com and an element on said tubing having; a ?ared end corresponding, to the ?are of said, tubing, conduit element i8, is ?tted ‘exactly. into the said ?aredend having; an annular recess in the recess l9’ in the thimble portion l9, and. the face thereof to receive. and seat the ?ared end inner face conforms exactly'to. the contour of _ of said tubing flush with the. ?ared, end of said or sleeve. ‘ ' ' ' ' ' ' Since the outside face of the ?are 2|v of the element and form a seal against high pressure the projection I3, on, the tubular conduit, the connection pressure will insure a tight, leak proof joint, without any dangerr or liability‘ of when the ?ared, end, of, said: tubing is, moved-into rupturing or otherwise injuring. the. ?are. by said nut. ‘ It,‘ will also beobserved that by this: construc abutting engagementwith said tubular conduit ' " ROY VAUGHT.