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US 2002/0117641 A1Published application
Flush valve dual seal gasket
AssigneeSloan Valve Company
InventorRichard A. Nortier
Life of this patent
Estimating the term…
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AssigneeSloan Valve Company
InventorRichard A. Nortier
Estimating the term…
A flush valve includes a body with an inlet and an outlet and a valve seat at the outlet. There is a piston assembly movable in the body toward and away from the valve seat to control flow from the inlet to the outlet. There is a pressure chamber in the flush valve body which maintains the piston assembly on its valve seat. The piston assembly includes a refill orifice connecting the pressure chamber with the body inlet. There is a relief valve in the piston assembly for venting the pressure chamber to the outlet. The piston assembly includes a guide and a piston attached thereto. There is a seal having an annular perimeter portion which is positioned between facing surfaces of the guide and piston and the seal has an annular interior portion positioned on the relief valve seat to form a seal with a relief valve. The seal interior portion and perimeter portion are connected by plurality of radially extending ribs permitting a degree of relative movement between the seal interior and perimeter portions.
A flush valve including a body having an inlet and an outlet, a valve seat at said outlet, a piston assembly movable in said body toward and away from said valve seat to control flow from said inlet through said outlet, a pressure chamber in said body above said piston assembly and normally maintaining said piston assembly closed upon said valve seat, said piston assembly including a refill orifice connecting said chamber with said body inlet,
A piston assembly for use in a flush valve body having an inlet and an outlet, and a valve seat at said outlet, the piston assembly being movable in said body toward and away from the valve seat to control flow from the inlet through the outlet, a relief valve in said piston assembly for venting a flush valve pressure chamber to the flush valve outlet, a seat in said piston assembly for said relief valve, said piston assembly including a guide and a piston attached thereto, a seal having an annular perimeter portion between facing surfaces of said guide and piston, said seal having an annular interior portion positioned on said relief valve seat to form a seal with said relief valve, and a plurality of spaced elements connecting said seal perimeter portion and interior portion to permit a degree of relative movement therebetween.
Dependencies are inferred from the claim text.