초록 ▼

A stab-type coupling and method for connecting an end portion of a smooth wall non-metallic pipe to fittings or other pipes. The coupling is defined by a non-metallic coupling body, a generally elongated hollow insert, annular spacer rings, seal rings, a collet ring, and a retaining collet all dispo

A stab-type coupling and method for connecting an end portion of a smooth wall non-metallic pipe to fittings or other pipes. The coupling is defined by a non-metallic coupling body, a generally elongated hollow insert, annular spacer rings, seal rings, a collet ring, and a retaining collet all disposed within the recess of the coupling body. The retaining collet is provided with a tapered external surface which is complementary to an internal frusto-conical surface defined by a back-up ring molded within the coupling body. The coupling is made up as by inserting the end of a smooth wall non-metallic pipe into the coupling body such that the pipe is received about the generally elongated hollow insert and within the retaining collet. The toothed internal surface of the retaining collet is adapted to engage the non-metallic pipe. Attempted withdrawal of the pipe from the coupling body is resisted by the collet toothed surface as well as the bearing engagement of the collet with the back-up ring molded into the coupling body.

대표청구항 ▼

A stab-type coupling for connecting an end portion of a smooth wall non-metallic pipe to a fitting or another pipe, said coupling comprising in combination: a non-metallic coupling body having a first end and an internal recess adapted to receive the end portion of a smooth wall non-metallic pipe; a

A stab-type coupling for connecting an end portion of a smooth wall non-metallic pipe to a fitting or another pipe, said coupling comprising in combination: a non-metallic coupling body having a first end and an internal recess adapted to receive the end portion of a smooth wall non-metallic pipe; a generally elongated metallic hollow insert disposed within said recess and about which the end portion of a smooth wall non-metallic pipe is adapted to be received; at least one elastomeric seal ring disposed within said recess and adapted to sealingly engage the end portion of a smooth wall non-metallic pipe and said coupling body when said pipe is disposed within said seal ring; a non-metallic retaining collet disposed within said recess, said collet having a tapered external surface which converges in the direction of said first end of said coupling body and a toothed internal surface adapted to engage the end portion of a smooth wall non-metallic pipe; a generally frusto-conical metallic back-up ring retained by said coupling body, said back-up ring having an internal surface generally complementary to said external surface of said collet and against which said collet is adapted to bear in the event of an attempted withdrawal of said smooth wall non-metallic pipe from said coupling body.