Patent ID: 7832427
Filing Date: 2010-11-16
Classification: F15B,F16K,Y10T

Abstract:
1. A control arrangement for providing working fluid to an actuator and for receiving return fluid from the actuator, the arrangement comprising first valve means operable to connect and disconnect a supply of pressurised working fluid to a plurality of ports of an actuator to effect a working sequence of the actuator, and second valve means operable to connect the supply to the first valve means to provide pilot pressure controlling the state of the first valve means, thereby controlling the working sequence of the actuator, and wherein pressurized fluid is supplied, in use, from the second valve means through a further valve means, said further valve means comprising first and second nozzles which face each other and are separated by a gap, wherein a jet of working fluid under working pressure, created by said first nozzle, crosses the gap, in use, to enter said second nozzle, and wherein working fluid not under working pressure, returning from said second nozzle is rejected from crossing said gap into said first nozzle.