摘要:
The present invention relates to a pipe coupling (10) of the type where a pipe (12) is freely insertable into the coupling (14) and where a nut (44) causes engagement of a grip ring (38) and gasket (28) with the pipe (12) to provide a seal between the coupling (14) and the pipe (12) , and where within the coupling (14) there is disposed a stop (16) to indicate to a user inserting the pipe (12) freely that the pipe (12) has been inserted to its required location. The stop (16) is located at a position where there is room beyond the stop (16) for the pipe (12) to move into. Tightening of the nut (44) causes the pipe (12) to move further into the coupling beyond the stop(16) . This solves the problem of the pipe being inserted too deeply into the coupling and being deformed when the nut (44) is tightened further.
摘要:
The present invention relates to a valve member for a valve of the ball valve type, including two shell parts rigidly joined together to form a valve member and generally snap-fitted over a frame. The two shells have opposed sealing surfaces and a flow passage extends through the shells and the frame. The valve member includes a means for engagement of a drive mechanism to enable rotation of the valve assembly, wherein said valve member can be rotated to present a sealing surface or alternatively rotated to present a flow path to a water supply when said valve member is located in a sealed fluid passage such as a pipe.
摘要:
An annular collet (12a) or gripping member radially located within a coupling assembly (10) of the type having a hollow body (18), nut (14) and an O-ring or seal (16) for connection of a pipe (34) thereto. The collet (12a) is axially split, the split (26) defined by first (28) and second (30) generally parallel ends that are of an engageable configuration, typically by one end having a projection and the other end a correspondingly shaped cavity enabling the ends to interlock. In normal operation of the coupling the collet (12a) exerts a longitudinal force on the O-ring (16) causing a seal. When it experiences an axial force that would normally relatively displace the two ends causing a leak, being engaged to each other this movement is resisted ensuring that the seal is maintained. The present invention also relates to a coupling having such a collet.
摘要:
A coupling (10) for the connection of a plastic or metal pipe (12) includes a hollow body (14) with an external thread (16) and a tapered inner surface (24). A nut (20) engages the body external thread (16), having at one end an internal thread (22) co-operable witch said body external thread (16) and at the other en an outwardly converging inner tapered surface (40). The coupling (10) includes a deformable gripping member assembly having housing (32) with an outwardly converging outer surface (42), the housing holding a metal band (34) having a plurality of radially inward projections (36) circumferentially disposed in at least one row. Typically the housing (32) is a split-ring type housing and holds the metal band (34) in a snap-fit type arrangement. Upon tightening of the nut (20), said nut inner tapered surface (40) abuts against and exerts a force on said gripping members outer surface (42) both in the longitudinal and radial directions to thereby cause the gripping member assembly to be urged both radially and longitudinally and thereby fixedly retain said pipe (12). The metal band projections ensure that the coupling can be used to retain both plastic and metal pipes. The metal projections are preferably burst-type holes having walls whose orientation is not parallel to the longitudinal or axial orientation of the coupling.
摘要:
The present invention relates to a sealing member for use in a pipe coupling assembly and, in particular, to a sealing member(14) for sealing the end of a pipe (12) having an exposed metal surface at its end, such as pipe (12) comprising an internal metal sheath which is lined internally and externally with plastic. The sealing member (14) includes a pipe receiving portion adapted to receive the end of the pipe (12) to thereby prevent contact between the end of the pipe an fluid travelling through the pipe. The sealing member (14) may be used in standard pipe couplings, or is preferably incorporated into a coupling having a deformable gripping member (34) whereby upon tightening of the coupling assembly nut (32), the gripping member (34) urges against the pipe (12) both radially and longitudinally to thereby simultaneously grip the pipe (12) and urge the pipe end within the pipe receiving portion.
摘要:
A nut and tail assembly (10) and method of manufacture including a nut (12) having a first end and an inward flange (24) at the other end, a longitudinal cylindrical hollow body (14) having a first end and a second end at which is located an outstanding flange (40) and a circular longitudinal sleeve (16). The sleeve (16) extends along said sliding surface and has a flange (44) at a first end abutting against the body flange (24). A stop (34) is located between the ends of the body (14) and defines a cavity sliding surface generally parallel to the longitudinal body between the stop (34) and flange (44). The nut inward flange (24) extends into the body cavity and is of a large enough diameter to be able to slide on said body sliding surface but small enough to be held within said cavity defined between said stop (34) and sleeve flange (44). Projections (50) on the sleeve flange (44) assist in locating the sleeve (16) relative to the nut (12) during the moulding process.
摘要:
A coupling for engagement with the outer surface of a polymeric pipe, having a sub-assembly of a compression sleeve (24), a resilient gasket ring (18) permanently attached to the inner end of the compression sleeve (24), a gripping member (25), and a nut (30). The gasket ring (18) encounters an abutment in a socket (17) in the body (12) as the nut (30) is tightened, and further tightening of the nut (30) radially compresses the gripping member (25) so that its inwardly directed barbed projections (26) engage the outer surface of a pipe (11) to which the coupling is attached. The end of pipe (11) is freely insertable through the gripping member (25) and sleeve (24), and into the socket (17) in the body (12). There are also provided abutment surfaces within the body of the coupling and the nut which abut inner and outer surfaces (34, 35) of a flange outstanding from the outer end of the compression sleeve (24). Also disclosed is an embodiment with a transition spigot (46) having a barbed tail inserted into an end of a pipe enabling the coupling to accommodate a range of similar but different diameter pipes.