Baths – closets – sinks – and spittoons – Strainer – stopper – plug or closure – Plugs
Patent
1978-09-01
1980-02-19
Footland, Lenard A.
Baths, closets, sinks, and spittoons
Strainer, stopper, plug or closure
Plugs
251 75, A47K 114
Patent
active
041886763
ABSTRACT:
A drain closure includes a flexible seal member formed as a segment of a sphere and centrally mounted on a post located at the center of the drain. The seal member is bistable between opposite involuted positions. In one position its free edges snap downwardly to engage the flange of the drain nut and in the other position its free edges snap upwardly to open the drain. The post is guided for limited vertical movement in a centrally hubbed retainer so that downwrd movement of the post flips the seal member to its upwardly involuted position. A relatively rigid disk slidably mounted about a button attached to the top of the post shields the seal member from a hard stream of water issuing from the spout above, thereby preventing the closure member from accidentally snapping closed. Also, the disk shields the closure member from the current of waste water draining through the device, thereby preventing accidental closure. The disk furthermore serves as a means for transmitting a force, by finger or toe, for involuting the seal member so that it assumes a sealing relationship with the flange of the drain nut. The seal member has an integral biconical sleeve that surrounds the post to provide a spring return of the post to its normal position.
REFERENCES:
patent: 3949433 (1976-04-01), Liou
patent: 3995333 (1976-12-01), Stephens
patent: 4006498 (1977-02-01), Cuschera
patent: 4103372 (1976-08-01), Cuschera
Tarnay Matthew G.
Tolnai Julius L.
Footland Lenard A.
Price-Pfister Brass Mfg. Co.
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