Fluid handling – Line condition change responsive valves – Direct response valves
Reexamination Certificate
2007-03-13
2008-09-09
Lee, Kevin (Department: 3753)
Fluid handling
Line condition change responsive valves
Direct response valves
C137S843000
Reexamination Certificate
active
07422034
ABSTRACT:
A one-way valve which can be utilized in a toilet, particularly in a urinal, to prevent return flow of malodorous gases from the sewage system into the room wherein the toilet is installed has a body which is confined in the toilet. The body carries two sheet- or panel-shaped valving elements at least one of which is resilient to yield to the flow of urine but normally sealingly engages the other element to prevent the flow of gases from the sewage system counter to the direction of flow of the urine. At least one marginal portion of the at least one valving element is free to move away from the corresponding marginal portion of the other element to also permit lateral outflow of urine when the one element is at least partially out of contact with the other element.
REFERENCES:
patent: 803979 (1905-11-01), Bonnell
patent: 3451419 (1969-06-01), Coleman
patent: 3463159 (1969-08-01), Heimlich
patent: 4084606 (1978-04-01), Mittleman
patent: 4227533 (1980-10-01), Godfrey
patent: 4709836 (1987-12-01), Andersen
patent: 4917646 (1990-04-01), Kieves
patent: 1 174 549 (2002-01-01), None
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patent: 2 296 309 (1996-06-01), None
patent: 2 346 198 (2000-08-01), None
patent: 2 352 497 (2001-01-01), None
patent: WO 98/25059 (1998-06-01), None
Bowman Gilfillan Inc. (John & Kernick)
Lee Kevin
Volpe and Koenig PC
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