Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
228 words
A valve for installation in a sewer line extending from a house or other building structure to prevent back flow of sewage into the house, said valve including a reciprocal gate mounted for movement between a closed position and an open position, a housing for said gate, said housing including wiper seal means adjacent the sewer pipe to clean the surfaces of the gate during reciprocation and to seal the gate in relation to the flow path of sewage, and means automatically moving said gate to its position in response to conditions of sewage flow in the sewer line on the downstream side of the valve in relation to the house or other building structure, bypass means associated with the valve for communicating the portions of the sewer line on each side of the valve, said bypass means including pump means for pumping sewage from the upstream side of the valve to the downstream side thereof in relation to the house when the gate closes thereby enabling sewage producing facilities in the house to be used in a normal manner when the valve is in closed position, said bypass means including a conduit, said gate including an aperture alignable with the conduit to automatically open the conduit when the gate is closed, said pump means including a chopper unit for reducing sewage particle size entering the pump means.
Claim 2
Dependent Claim
228 words
A valve for installation in a sewer line extending from a house or other building structure to prevent back flow of sewage into the house, said valve including a reciprocal gate mounted for movement between a closed position and an open position, a housing for said gate, said housing including wiper seal means adjacent the sewer pipe to clean the surfaces of the gate during reciprocation and to seal the gate in relation to the flow path of sewage, and means automatically moving said gate to its position in response to conditions of sewage flow in the sewer line on the downstream side of the valve in relation to the house or other building structure, bypass means associated with the valve for communicating the portions of the sewer line on each side of the valve, said bypass means including pump means for pumping sewage from the upstream side of the valve to the downstream side thereof in relation to the house when the gate closes thereby enabling sewage producing facilities in the house to be used in a normal manner when the valve is in closed position, said bypass means including a conduit, said gate including an aperture alignable with the conduit to automatically open the conduit when the gate is closed, said pump means including a chopper unit for reducing sewage particle size entering the pump means.
Claim 3
Dependent Claim
53 words
The structure as defined in claim 1 wherein said means for automatically operating the gate includes a float member mounted in the sewage flow path to be moved to a valve closing condition when the sewage in the flow path reaches a predetermined elevation commensurate with back flow conditions in the sewer line.
Claim 4
Dependent Claim
44 words
The structure as defined in claim 2 wherein said means automatically operating the gate includes a reversible motor, a rack and pinion gear drive interconnecting the motor and gate, said gate including a lower edge conforming with the inner surface of the sewer pipe.
Claim 5
Dependent Claim
49 words
The structure as defined in claim 3 wherein said pump means includes a pump having a housing with an intake opening communicating with the sewer line on the upstream side of the gate, a grate in the intake opening to limit the size of particles entering the pump housing.
Claim 6
Dependent Claim
41 words
The structure as defined in claim 4 wherein said chopper unit includes a multi-bladed chopper blade rotatably disposed in said intake opening above the grate, said pump including a shaft extending into the intake opening and drivingly mounting said chopper blade.
Claim 7
Dependent Claim
63 words
The structure as defined in claim 5 wherein said bypass means includes a conduit extending from a discharge opening in the pump housing to the sewer line on the downstream side of the valve, one-way valve means in said conduit, said gate aperture being aligned with the conduit when in said closed position and misaligned with the conduit when in said open position.