Valve controlled flushing system
AssigneeKohler Co.
InventorPeter M. Milnes
Life of this patent
Estimating the term…
Abstract
A valve controlled flushing system for a tank-type toilet installation comprises a siphon flush valve, a control valve that allows supply water to flow into the tank to initiate siphonic action, to supplement flow through the siphon flush valve and to refill the tank, which control valve utilizes a piston which is ordinarily seated in a closed position by supply line pressure, and an actuating valve to relieve the pressure on the piston of the control valve thus initiating the flushing cycle. In the preferred embodiment, the control valve utilizes a pressure biased piston which is ordinarily seated in a closed position against the water supply by supply line pressure which is transferred by a bypass circuit to a timing pressure chamber behind and exposed to the rear face of the piston.
Claims9
A valve controlled flushing system for use with a tank-type toilet comprises:
- a. a siphon flush valve positioned in said tank and adapted to convey tank water from said tank to the toilet bowl,
- b. a control valve for controlling the flow of supply water into said siphon flush valve to both pump tank water through said siphon flush valve and trigger siphonic action within and through said siphon flush valve, said control valve having a pressure biased piston which is ordinarily seated against the water supply and a pressure chamber located behind and exposed to the rear face of the piston,
- c. a bypass passage leading from the water supply to the pressure chamber, and
- d. actuating means located in the bypass passage between the water supply and the pressure chamber of the control valve, said actuating means ordinarily allowing the free flow of line pressure to the pressure chamber where the pressure is sensed by the rear face of the piston to maintain the control valve in a closed position said actuating means being triggerable to block line pressure to the pressure chamber and relieve the pressure upon the rear face of the piston thus allowing water supply pressure to move the piston from its seat thereby permitting flow through the control valve to the flush valve to initiate the flushing cycle.
A timed control valve for delivering a predetermined amount of water to a siphon flush valve which comprises:
- a. a valve body having a hollow interior divided into an inlet chamber and a piston chamber, said inlet chamber having a supply inlet and said piston chamber having a least one outlet, said inlet and piston chambers being connected by a passageway;
- b. a movable piston positioned in said piston chamber, said piston having a front face and a rear face, said piston being provided with sealing means on the front face which is effective to prevent the flow of supply water through said passageway, the effective surface area of said rear face exposed to supply pressure being larger than that of the front face exposed to supply pressure when the valve is in the closed position;
- c. means forming a fluid tight seal between the piston and the inner wall of said piston chamber to effectively divide said piston chamber into a separate outlet subchamber and a separate timing pressure subchamber, said outlet subchamber communicating with said passageway and said outlet and said timing pressure subchamber communicating with the rear face of said piston;
- and
- d. port means for introducing supply water and supply line pressure into the timing pressure subchamber and onto the rear face of the piston to maintain said piston in a position in which the sealing means is effective to prevent the flow of supply water through said passageway and into the outlet subchamber.
Dependencies are inferred from the claim text.