Patent ID: 6287094
Filing Date: 2001-09-11
Classification: F04C

Abstract:
An hydraulic pump comprising:a housing;at least one fluid inlet member, wherein said at least one fluid inlet member contains an inlet intake orifice to accept fluid from a source outside said hydraulic pump and an inlet exhaust orifice to allow fluid to pass out of said at least one fluid inlet member;at least one fluid outlet for expelling fluid from the pump;at least one pumping apparatus for transporting fluid from said at least one fluid inlet to said at least one fluid outlet;at least one bypass valve disposed between said pumping apparatus and said at least one fluid outlet;at least one diffuser member, wherein said diffuser member has a diffuser member intake orifice to accept fluid from said at least one bypass valve and a diffuser member exhaust orifice to allow fluid to pass out of said at least one diffuser member;at least one pressure chamber to accept fluid from said diffuser member exhaust orifice and from said fluid inlet exhaust orifice;wherein said diffuser member exhaust orifice has a smaller cross-sectional area than said diffuser member intake orifice whereby the kinetic energy of fluid passing through said at least one diffuser member is increased;wherein kinetic energy of the fluid from said at least one diffuser member is transformed into static pressure in said pressure chamber and mixes with fluid from said at least one inlet member; andwherein said at least one inlet member and said at least one diffuser member both feed fluid into said at least one pressure chamber.