Patent ID: 6688866
Filing Date: 2004-02-10
Classification: F04C

Abstract:
A gerotor pump for pumping pressurized fluid between an inlet port and an outlet port, said gerotor pump including:a pump housing defined by a pump cover and a pump end plate, said pump cover defining an open end, an axial bore, a bottom end, and a central opening in said bottom end, said pump end plate adapted to matingly engage said open end of said pump cover thereby enclosing said axial bore of said pump cover and creating an inner cylindrical chamber within said pump housing; a wear plate having a central opening and operatively disposed within said inner cylindrical chamber of said pump housing; a gerotor gear set assembly disposed within said inner cylindrical chamber of said pump housing such that said gerotor gear set assembly is operatively supported between said wear plate and said pump end plate; a shaft operatively connected to said gerotor gear set assembly for rotating said gerotor gear set assembly within said inner cylindrical chamber of said pump housing; a biasing member formed as a resilient annular ring that is operatively disposed between said bottom end of said pump cover and said wear plate, only said resilient annular ring adapted to operatively bias said wear plate against said gerotor gear set assembly and said pump end plate to create an axial zero tolerance condition between said wear plate, said gerotor gear set assembly, and said pump end plate.