Patent Number: 6,530,752

Title: Variable displacement pump

Abstract: In a variable displacement pump, a relief valve is constituted by a pilotdrive type relief valve obtained by adding a pilot valve to a main valve,a fluid pressure in a downstream side of a metering orifice provided in apump discharge side passage is applied to the pilot valve, and the mainvalve is capable of opening and closing a downstream side passage of themetering orifice with respect to a drain passage.

Inventors: Oba; Kenzo (Tochigi, JP), Yoshida; Katsuyuki (Tochigi, JP)


International Classification: B62D 5/07 (20060101); F04B 49/00 (20060101); F04C 2/00 (20060101); F04C 2/344 (20060101); F04B 049/00 ()

Expiration Date: 03/12015