G - Physics – 05 – D
Patent
G - Physics
05
D
137/34.5
G05D 11/00 (2006.01)
Patent
CA 1167347
ABSTRACT OF THE DISCLOSURE A gate valve is installed in a sewer line or drain pipe extending from a house or other building to a street sewer pipe or the like which will automatically close when sewage backs up from the street sewer pipe toward the house or building structure, thereby protecting the basement or other lower portions of the house or building structure from becoming flooded due to sewer backup. The gate valve is motor actuated and includes a vertically reciprocal gate controlled by a float operated switch structure disposed downstream of the gate valve to quickly and positively move the gate to fully closed position upon flood conditions existing in the lateral sewer pipe downstream of the gate valve thereby preventing back flow and flood conditions occurring on the house side or upstream of the gate valve. A motor operated pump and chopper unit communicates with the sewer pipe on the house side of the gate valve and discharges through a bypass line with a one-way flap valve therein to the street side of the gate valve in order to pump sewage around the gate valve when it is closed thereby enabling sewage to be discharged from the house side of the gate valve to the street side of the gate valve even when the gate valve is closed thereby enabling normal operation of the facilities in the house or other building which discharge sewage into the sewer line.
372237
Baumbach William J.
Macrae & Co.
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