Drain plug structure for bath tub

Details Drain plug structure for bath tub Drain plug structure for bath tub

2005-06-14

2005-06-14

Yu, Justine R. (Department: 3751)

Baths, closets, sinks, and spittoons

Strainer, stopper, plug or closure

Plugs

C004S689000

Reexamination Certificate

active

06904623

ABSTRACT:
A protrusion of the plug lid out of a bath tub is restricted to prevent the plug lid from being a hindrance, and water-tightness of the plug is improved. The plug lid is dropped into a notch formed in such a way that the circumferential edge of the plug lid becomes lower than the bottom surface of the bath tub. The packing closely contacts a packing close-contact surface narrowed from the bottom surface of the notch in a downward direction. The bottom part of the notch is formed into the horizontal plane and the plug lid is supported while it is not inclined under application of weight (such as a hydraulic pressure or an artificial pressure applied by a user) and the packing is protected from unnecessary crushing force.

REFERENCES:
patent: 4160293 (1979-07-01), Niemann
patent: 4411028 (1983-10-01), Hogner
patent: 4860390 (1989-08-01), Ohta
patent: 5363519 (1994-11-01), Husting
patent: 6347417 (2002-02-01), Ohta
patent: 6367102 (2002-04-01), McMullen
patent: 0960073 (1997-03-01), None
patent: 11099077 (1999-04-01), None
English Language Abstract of JP Appln. No. 09-060073.
English Language Abstract of JP Appln. No. 11-099077.

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