Abstract: A quick coupling comprising a body with a conical opening and an outside thread, a nut with a central through orifice and a cylindrical counterbore extending the through orifice and tapped over its portion that is remote from the through orifice, and a conical surface connecting the through orifice to the counterbore, the coupling comprising a ring housed in the counterbore of the nut, the ring having a front face directed towards the thread that is fitted with a sealing gasket whose rear face facing towards the coupling surface co-operates therewith to define a radial expansion housing for a split spring washer.

Abstract: Connection elements include a coupling defining an internal channel having an end segment possessing an insertion opening for insertion of an endpiece and provided with members for retaining the endpiece in leaktight manner therein. The members include an annular axially compressible sealing element that is mounted in the coupling to have one face serving as a bearing surface for a terminal face of the endpiece, and an annularly-shaped retaining element elastically deformable in a radial direction that is received in an inner groove (21) of the end segment to have an inner circumferential portion projecting through an opening of the inner groove so as to be received in an outer groove of the endpiece. The inner groove has a concave frustoconical flank beside the opening of the end segment to form members for shrinking the retaining element, and a convex frustoconical flank on its side remote from the opening.

Abstract: An instantaneous connection device includes a tubular body (1), a tight element used to hold the end of a line in the body and includes an elastically deformable annular sealing element and a holding element that are arranged to receive the end of the line, a cam member for moving the holding element from a free state into a state wherein it grips the end of the line when it is axially displaced in the tubular body from a first position to a second position, and an elastic member for bringing the holding element back towards its second position. The sealing element is mounted between a radial shoulder of the body and a radial face of the holding element. The radial shoulder and the radial face are provided with reciprocal reliefs for laterally coming into contact with the annular sealing element.

Abstract: Connection elements include a coupling defining an internal channel having an end segment possessing an insertion opening for insertion of an endpiece and provided with members for retaining the endpiece in leaktight manner therein. The members include an annular axially compressible sealing element that is mounted in the coupling to have one face serving as a bearing surface for a terminal face of the endpiece, and an annularly-shaped retaining element elastically deformable in a radial direction that is received in an inner groove (21) of the end segment to have an inner circumferential portion projecting through an opening of the inner groove so as to be received in an outer groove of the endpiece. The inner groove has a concave frustoconical flank beside the opening of the end segment to form members for shrinking the retaining element, and a convex frustoconical flank on its side remote from the opening.

Abstract: A coupler having a tubular body (6) which is arranged to receive a tubular element for transporting fluid and including a pipe end, and which is provided with elements (11) for snap-fastening the tubular element, the coupler including a bushing (15) provided on the inside with elements (23, 25) for retaining the pipe end, which elements are selectively activatable and deactivatable, wherein the bushing is mounted in the tubular body to be movable axially between a position for activating the retaining elements and a position for deactivating the retaining elements, and wherein the bushing is provided with snap-fastening elements complementary to those of the body for co-operating therewith in the activation position.

Abstract: A fluid transport circuit element comprising a body having a bore with one end fitted with a pipe end coupling device, the coupling device having a portion fitted with an anchor washer for anchoring the device in the bore, the washer being deformable between an anchor state and a free passage state, and wherein said portion being arranged to be drivable from outside the body in the insertion direction into the bore from an anchor position in which the washer is in its anchor state and a release position in which the washer co-operates with an abutment that is stationary relative to the bore in the insertion direction, thereby bringing the washer into its free passage state in which it is retained by retention means.

Abstract: The invention relates to a washer for a tube coupler device, the washer having an inner portion subdivided into a plurality of teeth with active portions having a free edge that defines an inside edge of the washer and that is arranged to penetrate into an outside surface of the tube, wherein the active portions are arranged so that the inside edge is substantially continuous. The invention also provides a method of making the washer and a coupler device.

Abstract: A quick coupling comprising a body with a conical opening and an outside thread, a nut with a central through orifice and a cylindrical counterbore extending the through orifice and tapped over its portion that is remote from the through orifice, and a conical surface connecting the through orifice to the counterbore, the coupling comprising a ring housed in the counterbore of the nut, the ring having a front face directed towards the thread that is fitted with a sealing gasket whose rear face facing towards the coupling surface co-operates therewith to define a radial expansion housing for a split spring washer.

Abstract: A fastener washer for a tube coupling device, the washer being deformable and having an inside circumference subdivided into a plurality of teeth (2) each possessing an active portion (3) connected via an intermediate portion (4) to a root portion (5), the intermediate portion being defined laterally by two parallel edges (9), and the active portion having a width (A) that is greater than a width (C) of the intermediate portion between the two parallel edges.

Abstract: A coupler having a tubular body (6) which is arranged to receive a tubular element for transporting fluid and including a pipe end, and which is provided with elements (11) for snap-fastening the tubular element, the coupler including a bushing (15) provided on the inside with elements (23, 25) for retaining the pipe end, which elements are selectively activatable and deactivatable, wherein the bushing is mounted in the tubular body to be movable axially between a position for activating the retaining elements and a position for deactivating the retaining elements, and wherein the bushing is provided with snap-fastening elements complementary to those of the body for co-operating therewith in the activation position.

Abstract: A device for connecting a pipe end to a member. The device has a tubular endpiece with a first end secured to the member and a second end through which the pipe end can be engaged in the endpiece. The endpiece is provided internally with an abutment against engagement of the pipe end and a way for securing the pipe end in leakproof manner inside the endpiece, and a sleeve that is elastically deformable at least in an axial direction. The sleeve is fixable axially in the endpiece and, towards the first end of the endpiece, has an end provided with an annular internal shoulder for coming into abutment against an end face of the pipe end so as to form the abutment against engagement of the pipe end.

Abstract: A quick-coupling device in the form of an insertable cartridge for coupling a tube within a cylindrical housing, the device comprising a tubular insert having external means for anchoring it inside the housing and internal means for retaining the tube, together with a gasket; wherein the tubular insert has a nose of outside diameter that is smaller than the diameter of the means for anchoring the tubular insert and has a protection ring of inside diameter close to the outside diameter of the nose, said ring being mounted on the free end of the nose and being held axially relative to the nose by weak locking means in an axially projecting position relative to the nose for internally receiving the gasket.

Abstract: A coupling device for a tube, the device comprising a body provided with a bore for receiving the end of said tube, and means for retaining the tube in the bore, which means are constituted by an elastically deformable washer that is substantially frustoconical in shape whose inside circumference is of a diameter smaller than the outside diameter of the tube and which is subdivided into a plurality of teeth, the outside portion of the washer being disposed in a groove formed in the bore. Each tooth possesses a short root portion which, at rest, extends in a radial plane, and an active portion that is inclined relative to the radial plane of the root, and each tooth is connected to the teeth adjacent thereto via small section peripheral link portions of length not less than the length of each tooth.

Abstract: A gasket for a claw or clamp quick-connection coupling, the gasket being constituted by a circularly symmetrical annular body defined by two parallel radial faces, an outer cylindrical surface surmounted by a partially toroidal bulge centered on the midplane of the gasket parallel to the radial faces, a partially toroidal inner surface also centered on the midplane, and connected to each of the radial faces via a respective chamfer-forming conical surface.