Pipe joints or couplings – Essential catch
Patent
1997-03-31
1998-08-18
Nicholson, Eric K.
Pipe joints or couplings
Essential catch
285308, 285321, F16L 5500
Patent
active
057949883
ABSTRACT:
A coupling for attachment to the end portion of a pipe having a circumferential groove includes a coupling body which receives the end portion of the pipe therein and a circumferential open ended resilient ring held by the coupling body. The ring is expanded by the larger outer diameter of the pipe as the end portion of the pipe is pushed into the coupling body but contracts back to its original diameter into the groove. With the ring in the groove, the coupling is locked to the end of the pipe and the pipe cannot be pulled from the coupling. The coupling is also provided with means to expand the ring mechanically so that the pipe can be released from the coupling or so that, while the pipe is being received by the coupling, the pipe does not encounter the ring until the ring is mounted into the groove of the pipe. The coupling can be provided with rings at each end to couple together two pipes end-to-end that may or may not have end portion grooves, or it can have a ring at one end and threads, flanges, a set of partially rotatable cammed jaw members, or other connector at the other end. The coupling can be used for pipe fittings, hoses, valves, pressure vessels, structural pipe, and electrical conduits.
REFERENCES:
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patent: 2901269 (1959-08-01), Rickard
patent: 3345087 (1967-10-01), Hanes et al.
patent: 3902743 (1975-09-01), Martin
patent: 4856823 (1989-08-01), Heren
patent: 5004274 (1991-04-01), Baas
patent: 5374088 (1994-12-01), Moretti et al.
patent: 5536047 (1996-07-01), Detable et al.
patent: 5653475 (1997-08-01), Scheyhing et al.
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