Abstract: The disclosure relates to a tube coupling collet for holding a tube in a tapered bore in a coupling body. The collet comprises a plastics molding having an annular head with a plurality of resilient arms extending axially from the head. A metal skeleton is embodied in the plastics molding comprising an annular element molded in the annular head of the collet and integral legs extending axially from the annular element within the resilient arms of the collet.

Abstract: A seal arrangement in a resilient molded plastics body having a bore to receive a cylindrical component. The seal is formed by a plurality of resiliently flexible annular lips molded integrally with the bore at spaced locations along the bore and extending inwardly of the bore to seal with the surface of a cylindrical component (e.g. a tube) inserted in the bore. The lips are angled to extend both inwardly and along the bore in one direction to receive said cylindrical component and preferably three or more sealing lips are provided.

Abstract: The disclosure relates to a tube coupling having a coupling body with a throughway open at one end to receive a tube and an open ended housing on the body projecting from one end through which a tube may extend into the throughway in the body. A collet is located in the housing having an annular part with resilient legs projecting towards the open end of the housing and terminating in jaws to engage an upset on the tube to hold the tube in the coupling body. The housing has an end region remote from its coupling body in which the collet jaws are constrained against expansion to release the tube and an intermediate region in which the ends may expand. A collet has arms projecting into and held in the throughway of the coupling body when a tube is present to restrain the collet so that the collet jaws are prevented from moving beyond the ends of the region of the housing to a position in which they could expand and release the tube.

Abstract: The disclosure relates to a grab ring for locking a cylindrical component in a bore in another component. The ring may formed of L-shaped cross-section, one limb of which is part cylindrical form and the other limb of which extends radially with respect to the part cylindrical rim. The free edge of the radial limb has a multiplicity of teeth formed integrally with the rim and projecting outwardly therefrom at an oblique angle to allow the ring to slide past a bore ring component in one direction but to grip in the bore in the opposite direction.

Abstract: The disclosure relates to a grab ring comprising an annular element having one set of teeth projecting outwardly at an inclined angle to the annular element to one side thereof and a second set of teeth projecting inwardly at an inclined angle to the annular element to the other side thereof to engage between a pair of inner and outer concentric cylindrical surfaces to permit relative movement between the surfaces in one direction whilst preventing relative movement in the opposite direction.

Abstract: A method for forming a tube coupling body having a throughway open at one end of the body to receive a tube. The throughway has a portion of enlarged internal diameter adjacent said open end to provide a cavity to receive a device for locking a tube in the body and a second portion of equivalent internal diameter to the external diameter of the tube to be received in the coupling body with a close fit. The body is formed from an elastomeric material such that the body can be stripped from the tooling used to form the throughway including said enlarged internal diameter portion by stretching the body over the tooling and by virtue of its elastomeric property, returns to its moulded shape.

Abstract: A tube coupling comprising a coupling body having a throughway open at one end to receive an end part of a tube, sealing elements in the throughway to form a sealing engagement with the end part of the tube located in the throughway, a locking device in the form of a collet engageable with an annular bead on the tube adjacent to the end part of the tube to hold the end part of the tube in the coupling body in engagement with the sealing elements and a projection or projections to provide a resistance to entry of the tube into the throughway prior to engagement of the collet with the tube bead so that a force applied to the tube to overcome the resistance also overcomes any resistance offered by the locking device to ensure that the tube bead is engaged with the locking device.

Abstract: The disclosure relates to a tube coupling comprising a coupling body, having a throughway open at one end to receive a tube. A first collet is mounted in the throughway to grip the tube and resist extraction of the tube from the throughway. A cap is mounted to extend over the open end of the coupling body to house a second collet arranged head to head with the first collet. The second collet is engageable with an annular abutment on the tube to retain the tube in the coupling body. A single release means in the form of plunger elements is provided on the cap to act on the collets to allow release of the tube from the coupling body.

Abstract: A tube coupling for co-axial tubing includes a body having a throughway open at one end to receive an end portion of a length of co-axial tubing. The throughway has an annular seat spaced from the open end to receive the outer tube of the co-axial tubing and a tube locking means disposed between the seat and the open end to receive and lock the tubing in the throughway. A conduit is mounted concentrically in the throughway and is connected integrally with the coupling body to receive an inner tube of the co-axial tubing to provide a separate passageway extending concentrically within the throughway.

Abstract: The disclosure relates to a cylindrical collet for a tube coupling body, the collet having at least one arm of arcuate cross section which is free to flex radially under the action of an encircling tapered cam surface in the tube coupling body. The arm has a projecting tooth on its radially inner side having an inner edge to engage and grip a tube extending through the collet. The inner edge of the tooth extends linearly transversely of the arm to engage the tube tangentially and, with pressure from said cam surface, to bite into the surface of the tube.

Abstract: The disclosure relates to a threaded member having an annular groove which is of greater depth than the base of the adjacent thread. A resilient ring is mounted in the groove having an outer periphery extending above the base of the thread and a plurality of projections are formed at spaced locations around the ring to be deformed by the engagement of the threaded member with a corresponding threaded member to form a seal between the respective threads of the engaging members.

Abstract: The disclosure relates to tube couplings having a moulded plastics coupling body with a throughway having a tapered cam surface extending to an open end. A moulded plastics collet is located in the open end of the coupling body and has an annular portion with an encircling flange at the outer end of the body and four equi-spaced slots extending into the collet from the other end to divide the collet into four resilient fingers which are pressed inwardly by the tapered cam surface to engage and grip a tube extending through the collet into the body. The slots have T-shaped ends adjacent the annular part of the collet to increase the flexibility of the fingers at their roots.

Abstract: Method of manufacturing a tube coupling body in a plastics material using injection moulding tooling. The body is formed with a cylindrical bore having enlarged end portions in a mould body and using removable cores. The cores form both the internal bore of the mould body and also end parts of the mould body so that once the cores are removed, end parts of the coupling body are revealed in the mould. While the end parts are still hot from the initial moulding operation, forming dies having tapering end cavities are pressed over the end parts of the moulding to form the end parts of the moulding with both external and corresponding internal tapered surfaces. The tapered internal surfaces of the end parts thus formed provide tapered cam surfaces for engaging the resilient arms of collets to be inserted in the coupling body to receive and lock tubes in the coupling body.

Abstract: The disclosures relates to a tube coupling comprising a coupling body (11) having a throughway (12) to receive a tube (15) from one open end to be locked in the coupling body by a collet (18) having resilient fingers (20) engageable with a tapered cam surface (17) adjacent the open end of the body to press the arms against the tube to lock the tube in the coupling body.The coupling body has an internal integral sleeve (25) extending concentrically along the thoughway to engage in the tube where the tube is engaged by the fingers of the collet. The sleeve has an integral internal cruciform to support the walls of the sleeve against the pressure imposed thereon by the arms of the collet acting through the tube. The end of the cruciform projects from the end of the sleeve adjacent the open end of the coupling body and tapes to an arrow-shaped head (27) to facilitate insertion of the tube over the sleeve into the coupling body.

Abstract: The disclosure relates to double ended tube coupling (10) having a coupling body (11) with the throughway (12) through which a tube can pass. Collets (16) are located in the open ends of the throughway having resilient arms to engage the tube and tapered internal cam surface (15) are formed adjacent the open ends of the throughway to engage the arms of the collets to cause the collet to lock tubes extending into the ends of the coupling body in the body. Midway along the throughway in the coupling body there are four resilient arms (25) moulded integrally with the wall of the coupling body and inclined towards one end of the coupling body to provide end stops (26) to limit the insertion of a tube into the coupling body from that one end but to permit a tube to pass through the coupling body when inserted from the other.

Abstract: The disclosures relates to a tube coupling (10) for a tube (11) having a body (12) with open ended throughway (13) to receive the tube and a collet (21) in the open end of the throughway having resilient arms (23) engaging a tapered cam surface (20) in the body to clamp the ends of the arms against a tube extending through the collet into the body to lock a tube in the body.The body has a cylindrical outer surface and a cylindrical cover (30) encircles and is slidable along the body. One end of the cover has an end wall (32) extending across the end of the body opposite the open end of the throughway with an aperture (33) through which the tube extends. The other end of the cover has an internal annular projection (35) which snaps over the end of the cylindrical body to retain the cover on the body while permitting the cover to slide linearly along the body.

Abstract: The disclosure relates to a tube coupling (10) for a tube (11) comprising a body (12) having a throughway (13) to receive the tube through an opening (24) at one end of the body with a multi-fringered collet (26) in the open end engageable with a tapered cam surface (25) in the throughway to lock a tube in the throughway. The coupling body is formed in two parts comprising a main section (12a) in which the throughway is enlarged at (18) to receive a seal (19) for the tube and a subsidiary section (12b) in which the tapered cam surface (25) and open end (24) of the body are formed. The main section of the body is formed in a deformable metal and has a socket (30) encircling the throughway which is initially formed with a parallel sided wall (21).

Abstract: The disclosure relates to a tube coupling having a body with a throughway open at one or both ends to receive a tube. A collet is located in the throughway and a plurality of resilient fingers which engage an internal cam surface tapering in one direction towards said one end of the throughway to compress the fingers against the tube to grip and hold the tube when the collet is drawn in said one direction with the tube. An end of the collet projects from the throughway and can be depressed into the throughway to release a tube therefrom and an end cap is detachably mounted on the body to cover said open end of the throughway. The end cap has manually operable radially movable presser members for engaging the end of the collet projecting from the throughway for urging the collet into the throughway to release a tube from the body.

Abstract: The disclosure relates to a quick release tube couplings in which a collet with resilient arms is arranged to co-operate with a tapering cam surface in a member surrounding the collet to force the arms to grip a tube within the collet. The member is formed from two, male and female parts each having a bore, the male part bore being tapered to provide the cam surface. The male and female parts are assembled with a pair of annular surfaces on the respective parts spaced apart by an edge or projection on one of the surfaces and ultrasonic vibration is applied to soften the ridge to cause the surfaces to weld together and to allow two other opposed annular surfaces to come together and be welded by said ultrasonic vibration to weld the two parts together at two spaced annular region.

Abstract: The disclosure relates to a tube coupling comprising a coupling body having a throughway open at one end of the body to receive a tube. A collet is located in the throughway having an annular element and at least one radially resilient finger extending axially from the element toward said open end of the throughway. The coupling body has a stop face directed along the throughway axis away from said open end and the distal end of the finger has on its inner side a projection to engage a feature on the tube and on its outer side a first, axially facing abutment directed towards the open end of the throughway to engage with the stop face and a further, radially facing abutment engageable with the coupling body when the axially facing abutment engages the stop face to constrain the distal end of the finger against radial outward movement and thereby to prevent release of the projection on the finger from the feature on the tube and release of the tube from the coupling body.