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US 4,060,857 AGranted
Water flushing device
OwnerLucien Coutoninventor
Life of this patent
Estimating the term…
Abstract
A pressurized-tank water flushing device has a hydraulically controlled flushing valve operated by a control valve for selectively applying a pressure differential to an actuating piston, one face of which is permanently subjected to the tank pressure, and the other face either to the water supply, or to atmospheric pressure. The actuating piston has a hollow shank acting as a slide valve which switches on the supply of water to the tank when the flushing valve closes, and cuts off the supply of water to the tank when the flushing valve opens.
Claims3
A water flushing device comprising:
- a fluid-tight tank;
- means for delivering water to the tank to trap and compress a quantity of air in the tank above the level of water;
- means defining a water-flushing outlet in the tank;
- a tank flushing valve movable between a closed position closing said outlet and an open, flushing position, hydraulic actuating means controlling said flushing valve, said actuating means including a cylinder, a piston slidable in said cylinder, said flushing valve slidably connected with said piston, spring means normally biasing said piston in an upward direction and said flushing valve to an open flushing position;
- and piston including a slide valve for preventing the delivery of water to the tank when said flushing valve is in the open position, said piston further including an upper face and a lower face, a control valve, first pipe means connected with said control valve and with the top of said cylinder above the upper face of said piston, second pipe means connected with said means for delivering water to the tank and with said control valve, third pipe means connected with said control valve and the atmosphere, whereby actuation of said control valve permits selective connection of the upper face of said piston to water pressure or to atmospheric pressure through said first and third pipe means respectively, causing said flushing valve to move between an open and closed position and causing said slide valve to turn on the water supply to the tank when the flushing valve closes and cut off the water supply to the tank when the flushing valve opens.
2 more elements
A water flushing device comprising:
- a fluid-tight tank;
- means for delivering water to the tank to trap and compress a quantity of air in the tank above the level of water;
- means defining a water-flushing outlet in the tank;
- a tank flushing valve movable between a closed position closing said outlet and an open, flushing position, hydraulic actuating means controlling said flushing valve, said actuating means including a cylinder, a piston slidable in said cylinder, said flushing valve slidably connected with said piston, spring means normally biasing said piston in an upward direction and said flushing valve to an open flushing position;
- said piston including a slide valve for preventing the delivery of water to the tank when said flushing valve is in the open position, said piston further including an upper face and a lower face, said slide valve comprising a hollow shank movable with the piston, said flushing valve carried by a support slidably mounted in said hollow shank, abutment means between said support and said hollow shank defining a rest portion of said support and said shank and a spring biasing said support to the rest position, a control valve, first pipe means connected with said control valve and with the top of said cylinder above the upper face of said piston, second pipe means connected with said means for delivering water to the tank and with said control valve, third pipe means connected with said control valve and the atmosphere, whereby actuation of said control valve permits selective connection of the upper face of said piston to water pressure or to atmospheric pressure through said first and third pipe means respectively, causing said flushing valve to move between an open and closed position and causing said slide valve to turn on the water supply to the tank when the flushing valve closes and cut off the water supply to the tank when the flushing valve opens.
2 more elements
Dependencies are inferred from the claim text.