Patent ID: 7204185
Filing Date: 2007-04-17
Classification: F15B

Abstract:
1. A hydraulic system, comprising: a source of pressurized fluid; a fluid actuator having a first chamber and a second chamber; a first valve configured to selectively fluidly communicate the source with the first chamber; a second valve configured to selectively fluidly communicate the source with the second chamber; a supply passageway configured to direct pressurized fluid from the source to the first and second valves in parallel; a signal passageway disposed between the first and second valves, the first and second valves being connected in parallel with the signal passageway; a proportional pressure compensating valve configured to control a pressure of a fluid directed between the source and the first and second valves; and at least one pressure balancing passageway disposed between the supply and the signal fluid passageways to fluidly communicate the supply and signal passageways.