Patent ID: 7165951
Filing Date: 2007-01-23
Classification: F04B

Abstract:
1. A high-pressure generating device comprising a cylindrical housing with an intake port, an outlet port, a pressure chamber, a first protrusion extending inside said pressure chamber and having a first fluid passage connecting said intake port to said pressure chamber, a second protrusion extending inside said pressure chamber and having a third fluid passage and an outlet fluid passage connecting said outlet port to said pressure chamber, said second protrusion being provided at its innermost end with a partition member, a cylindrical piston disposed reciprocally in said pressure chamber and having a first chamber section, a second chamber section, a third chamber section and a partition wall for partitioning said first and second chamber sections, said partition wall having a second fluid passage, said first chamber section being connected to said intake port through said second fluid passage, said third chamber section being connected to said outlet port through said outlet fluid passage in said second protrusion, said first and second chamber sections being connected to each other through said second fluid passage in said partition wall, a first check valve mounted in said first fluid passage for allowing fluid to flow from said intake port to said first chamber section, a second check valve mounted in said second fluid passage for allowing fluid to flow from said first chamber section to said second chamber section, a third check valve mounted in said third fluid passage for allowing fluid to flow from said second chamber section to said third chamber section, and an actuator for reciprocally moving said piston to allow fluid to be introduced from said intake port into said pressure chamber and discharged from said pressure chamber through said outlet port.