Patent ID: 7438090

Claim:
A booster valve comprising: a housing having an inlet and an outlet; a platform located in said housing, said platform located in a flow passage in the booster valve and centrally supported in the housing to permit a peripheral fluid flow past a circumferential edge of the platform; a one-piece resilient sealing member, having an integral flange extending along a central portion of the sealing member and an integral locator post extending from a first side of the sealing member and a further integral post extending from the opposite side of the sealing member, said platform normally supporting said flange with said flange and an inherent resiliency of said resilient member holding a peripheral sealing region of said resilient sealing member in a partially flexed and sealed condition against an annular portion of said housing to form a bias seal to prevent a backflow from said outlet to said inlet, said peripheral sealing region of said sealing member flexing in response to a higher pressure at said inlet than said outlet to permit a fluid pressure differential across said sealing member to bring said peripheral sealing region of said sealing member from said sealed condition to an unsealed condition to thereby permit a booster flow of fluid from said inlet to said outlet, said locator post engaging said platform to maintain said sealing member in a central condition in a flow region of the housing with the locator post and the further locator post coacting to maintain the sealing member in a central condition in the flow region of the housing.