Pipe-coupling device

Details Pipe-coupling device Pipe-coupling device

2005-02-08

2005-02-08

Nicholson, Eric K. (Department: 3679)

Pipe joints or couplings

Packed

Wedge

C285S323000, C285S232000, C285S342000, C285S383000, C285S113000

Reexamination Certificate

active

06851728

ABSTRACT:
A pipe-coupling device comprises a joint body having an opening with external threads to receive a pipe, a locknut having internal threads engaged with the external threads of the joint body, an annular core member disposed within the locknut, and a plurality of locking members retained in apertures of the core member to be spaced circumferentially apart from each other. Upon tightening rotation of the locknut around the joint body, the internal conical surface of the locknut slidably contacts with the conical surfaces of the locking members so as to press the locking members radially inwardly, to cause the gripping portions of the locking members come into gripping engagement with the outer periphery of the inserted pipe, thereby strongly preventing withdrawal of the pipe from the joint body even when the pipe is made of hard material.

REFERENCES:
patent: 2034644 (1936-03-01), Walsh
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patent: 2779610 (1957-01-01), Risley
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patent: 5207459 (1993-05-01), Glover
patent: 5957509 (1999-09-01), Komolrochanaporn
patent: 6106029 (2000-08-01), DeMore et al.
patent: 6378915 (2002-04-01), Katz
patent: 2 043 814 (1980-10-01), None
patent: 2043814 (1980-10-01), None
patent: 50-2575 (1975-01-01), None
patent: 10-122460 (1998-05-01), None
patent: 2003-004934 (2003-03-01), None

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