F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
137/63, 137/18.2
F16K 15/00 (2006.01) E03F 7/04 (2006.01) F16K 31/22 (2006.01)
Patent
CA 1127501
ABSTRACT OF THE DISCLOSURE 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.
346054
Anderson Alonzo B.
Gowling Lafleur Henderson Llp
LandOfFree
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