Valve assembly

Details Valve assembly Valve assembly

1988-09-07

1990-10-16

Michalsky, Gerald A.

Baths, closets, sinks, and spittoons

Ventilation

House plumbing

4219, 1372162, 1374938, 1375121, 137526, E03F 508

Patent

active

049625489

ABSTRACT:
A plumbing arrangement is described for a toilet pan connected to a waste disposal pipe. The waste pipe has an extension extending a short height above the flood level of the water trap. The upper end of the extension is closed off by a two way differential valve opening to the atmosphere. A cover is provided to permit the air flow to and from the valve but still to prevent the ingress of leaves or dirt which could have a detrimental effect upon the working of the valve. A number of embodiments of valve means are also described.

REFERENCES:
patent: 204135 (1878-05-01), Convery
patent: 507636 (1893-10-01), Schneider
patent: 1235558 (1917-08-01), Laval
patent: 1978507 (1934-10-01), Rand
patent: 2351874 (1944-06-01), Parker
patent: 2405241 (1946-08-01), Smith
patent: 2461392 (1949-02-01), Parry
patent: 3605132 (1971-09-01), Lineback
patent: 3815629 (1974-06-01), Oberholtzer
patent: 4518014 (1985-05-01), McAlpine
patent: 4556084 (1985-12-01), Frawley

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