Patent ID: 6926247
Filing Date: 2005-08-09
Classification: E03D,F16K

Abstract:
1. A flush valve including a body having an inlet and an outlet, a main seat assembly at said outlet, an outer cover attached to the body, an inner cover attached to the body within the outer cover, a piston movable within the body and inner cover, the piston and the inner cover defining a pressure chamber, an exterior seal carried by the piston and bearing against an inside wall of the inner cover during movement of the piston, a refill orifice in the piston connecting the pressure chamber with the body inlet, pressure in the pressure chamber maintaining the piston closed upon the main seat assembly, a relief valve in the piston for venting the pressure chamber to the outlet, and an actuator mounted in the body and selectably engageable with the relief valve to vent the pressure chamber causing the piston to move away from the main seat assembly.