Fluid handling – Liquid level responsive or maintaining systems – By float controlled valve
Patent
1979-08-13
1981-10-27
Rosenthal, Arnold
Fluid handling
Liquid level responsive or maintaining systems
By float controlled valve
4287, 1374542, F16K 3122, F16K 3300
Patent
active
042967783
ABSTRACT:
An anti-backflow valve for sewer traps or catch basins is adapted to automatically prevent the undesirable backflow of sewer water upwardly through a trap, but provides for the normal downflow of water through the trap into the sewer. Such valve arrangement has a top or floor plate for insertion over the top of a conventional catch basin with a slotted valve housing extending downwardly from the floor plate. A conically-shaped sealing member is slidingly disposed for vertical movement within the housing to seal or unseal the trap. An elongate downwardly-extending guide member is attached to the underside of the conically-shaped sealing member. A bottom plate is detachably mounted to the underside of the valve housing and is provided with apertures therein to permit the flow-through of water. The center of the bottom plate is provided with a guide means for slidingly holding the downwardly-extending guide member to prevent canting or misalignment of the sealing member as it slides vertically in the housing.
REFERENCES:
patent: 844003 (1907-02-01), Conrad
patent: 1423679 (1922-07-01), Pavitchich
patent: 1982555 (1934-11-01), Van Der Horst
patent: 2758664 (1956-08-01), Koenig
patent: 2787376 (1957-04-01), Coulson
patent: 3747894 (1973-07-01), Pepper
patent: 3768505 (1973-10-01), Benke
patent: 4088149 (1978-05-01), Logsdon
Cornaby K. S.
Rosenthal Arnold
Walton G. L.
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