Pipe joints or couplings – With assembly means or feature – Particular tool-engaging means or with tool
Patent
1996-08-20
1997-10-28
Nicholson, Eric K.
Pipe joints or couplings
With assembly means or feature
Particular tool-engaging means or with tool
285339, 285353, 285156, 285348, F16L 3500
Patent
active
056810580
ABSTRACT:
An assembly for joining a pipe to a pipe fitting includes an anti-leak gasket which is mounted around the pipe and which has a tapered portion with an outer periphery complimentary to and thus fittingly received in a tapered inner wall section of the pipe fitting. An inner threaded ring is mounted around the pipe at a position above the anti-leak gasket and includes threads defined in an outer periphery thereof for threaded engagement with threads defined in the pipe fitting, The inner threaded ring further includes an inclined inner peripheral wall. A C-shaped ring is mounted between the inclined inner peripheral wall of the inner threaded ring and the outer periphery of the pipe. The C-shaped ring includes a plurality of first protrusions projecting from an inner periphery thereof and received in an annular groove of the pipe and a plurality of second protrusions projecting from an outer periphery thereof. The outer periphery of each second protrusion of the C-shaped ring is a beveled surface for fittingly engaging with the inclined inner peripheral wall of the inner threaded ring. The C-shaped ring frictionally clamps the pipe upon rotation of the inner threaded ring.
REFERENCES:
patent: 3972547 (1976-08-01), Itoya
patent: 3986730 (1976-10-01), Martelli et al.
patent: 4095826 (1978-06-01), Borradoru
patent: 4256335 (1981-03-01), Nielsen, Jr.
patent: 4647086 (1987-03-01), Maxwell et al.
patent: 4792160 (1988-12-01), Hwang
patent: 4930816 (1990-06-01), Hwang
patent: 5176409 (1993-01-01), Brooks
patent: 5516157 (1996-05-01), Williamson
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