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US 2005/0087709 A1Published application
Valve seat for piston-type flushometer
AssigneeSloan Valve Company
InventorRichard Nortier
Life of this patent
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AssigneeSloan Valve Company
InventorRichard Nortier
Estimating the term…
A flush valve includes a body having an inlet, an outlet and a main seat assembly between the inlet and outlet. A piston moves within the body and with the body defines a pressure chamber which is used to normally maintain the piston closed upon the main seat assembly. There is a refill orifice in the piston connecting the pressure chamber with the inlet. A relief valve is carried by the piston for venting the pressure chamber and there is a fluid driven apparatus for opening the relief valve, which apparatus is attached to the body. A hydraulic bypass in the body is connected to the fluid driven apparatus. The main seat assembly has a plurality of peripherally disposed fluid passages connecting the hydraulic bypass and the inlet to provide filtered fluid to the fluid driven apparatus. A first seal on the main seat assembly has a flat portion and an arcuate portion constrained within a channel. Lockout lugs formed in the seal prevent installation of an incorrectly sized piston.
A flush valve comprising a body defining a pressure chamber and having an inlet and an outlet, a main seat assembly between said inlet and outlet, a piston movable within the body, a refill orifice in the piston providing fluid communication between the inlet and the pressure chamber, pressure in the pressure chamber maintaining the piston closed upon the main seat assemmbly, a relief valve carried by the piston for venting the pressure chamber, a fluid-driven actuator attached to the body for selectably opening the relief valve, a hydraulic bypass in the body providing fluid communication between the inlet and the fluid-driven actuator, said main seat assembly having a plurality of fluid passages providing fluid communication from the inlet to the hydraulic bypass to provide fluid to the fluid-driven actuator.
A flush valve comprising a body defining a pressure chamber and having an inlet and an outlet, a main seat assembly between said inlet and outlet, a piston movable within the body, a refill orifice in the piston providing fluid communication between the inlet and the pressure chamber, pressure in the pressure chamber maintaining the piston closed upon the main seat assembly, a relief valve carried by the piston for venting the pressure chamber, an actuator attached to the body for selectably opening the relief valve, the main seat assembly further comprising a main seat filter and a sealing surface on an upper surface of the main seat filter, the sealing surface being in contact with the piston when the flush valve is in a closed position and the sealing surface including an arcuate crown.
A flush valve comprising a body defining a pressure chamber, the body having an inlet, an outlet and a shoulder therebetween, the shoulder defining an internal sealing wall, a main seat assembly disposed between said inlet and outlet and having a static seal engageable with said internal sealing wall, a piston movable within the body, a refill orifice in the piston providing fluid communication between the inlet and the pressure chamber, pressure in the pressure chamber maintaining the piston closed upon the main seat assembly, a relief valve carried by the piston for venting the pressure chamber, a fluid-driven actuator attached to the body for selectably opening the relief valve, a hydraulic bypass in the body providing fluid communication between the inlet and the fluid-driven actuator, said main seat assembly having at least one fluid passage providing fluid communication from the inlet to the hydraulic bypass to provide fluid to the fluid-driven actuator, the hydraulic bypass being located so as to be spaced from the internal sealing wall of the shoulder.
Dependencies are inferred from the claim text.