Patent ID: 7713033
Filing Date: 2010-05-11
Classification: F04B,Y10T

Abstract:
1. A fluid control system comprising: a source of a pressurized fluid; a first spool valve having at least two positions, wherein the first spool valve is connected in fluid communication with the source of the pressurized fluid; a second spool valve having at least two positions, wherein the second spool valve is connected in fluid communication with the first spool valve and the source of the pressurized fluid; and a first pump comprising a power chamber; wherein when the first spool valve is in a first position and the second spool valve is in a second position, the source of pressurized fluid is in fluid communication with a first supply port of the second spool valve via a first groove of the second spool valve and a first groove of the first spool valve, and the source of pressurized fluid is in fluid communication with a first supply port of the first spool valve via a second groove of the first spool valve; and wherein when the first spool valve is in the first position and the second spool valve is in the second position, the second groove of the first spool valve is in fluid communication with the power chamber of the first pump via the first spool valve.