Plug for sink drainage

Details Plug for sink drainage Plug for sink drainage

2006-04-25

2006-04-25

Nguyen, Tuan (Department: 3751)

Baths, closets, sinks, and spittoons

Strainer, stopper, plug or closure

Plugs

C004S287000

Reexamination Certificate

active

07032254

ABSTRACT:
The present invention discloses an optimized plug for a sink drainage to solve the inferior plug shaft and plug knob structure. The plug shaft and plug knob has two engaging structures, namely, rotating engagement and vertically sliding structure; the plug includes a plug body, a plug shaft, a plug knob, and a plug cap, wherein the plug shaft has side slot defined a top end, the plug knob has a trans-slot, a longitudinal annual channel, and knob shoulder and a biasing bridge slidable inserted into the side slot; by rotating the plug cap from 10° to 170° angular degree, the biasing bridge is supported by the top edge of the plug shaft for ensuring the plug in a water-flowing position, while from 171° to 11° degree, the plug knob is slide into the plug shaft for sealing the water; by inserting an elastic member into the trans-slot, the elastic member is adapted to extend out for biasing the plug shaft edge.

REFERENCES:
patent: 4908883 (1990-03-01), Rivera
patent: 4926507 (1990-05-01), Craig et al.
patent: 5072461 (1991-12-01), Logsdon
patent: 5758368 (1998-06-01), Ball
patent: 6067669 (2000-05-01), Peterson et al.
patent: 6418570 (2002-07-01), Ball

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