Clean-out repair plug

Details Clean-out repair plug Clean-out repair plug

2007-10-22

2008-12-16

Brinson, Patrick F (Department: 3754)

Pipes and tubular conduits

With closures and plugs

C138S092000

Reexamination Certificate

active

07464727

ABSTRACT:
The present invention addresses provides a clean-out plug that seals a pipe system clean-out that includes a clean-out end and an inner surface, a portion of which is threaded. In general, the clean-out plug includes a compressible sealing member that is retained by the clean-out plug and that seals against an inner surface of the clean-out and/or the back side of the threaded portion of the clean-out. The clean-out plug may also include a cover plate that is secured to the clean-out plug via a second retaining member that engages a first retaining member of the clean-out plug. By sealing against the inner surface and/or back side of the threaded portion of the clean-out, various embodiments of the present invention do not seal within the treaded portion of the clean-out, which is often damaged by cross-threading from previous removals and reinsertions of threaded clean-out plugs. Additionally, by retaining the sealing member, the sealing member remains with the clean-out plug when the clean-out plug is removed from the clean-out.

REFERENCES:
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patent: 3613936 (1971-10-01), Kaiser et al.
patent: 3667640 (1972-06-01), Morrow
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patent: 4585033 (1986-04-01), Westman
patent: 4820474 (1989-04-01), Leslie et al.
patent: 5035266 (1991-07-01), Benson et al.
patent: 5348085 (1994-09-01), Benson
patent: 5353841 (1994-10-01), Mathison et al.
patent: 6513549 (2003-02-01), Chen

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