Patent ID: 7137330

Claim:
A fluid powered vehicle seat adjustment system, the system comprising: a fluid actuator including a first inlet/outlet and a second inlet/outlet, the actuator being responsive to pressurised fluid directed to and from the first and second inlet/outlets; a source of pressurised fluid; and a controller for selectively controlling and directing pressurised fluid selectively to either the first or second inlet/outlets of the actuator; wherein the actuator further comprises a first actuator isolation valve associated with the first inlet/outlet of the actuator and a second actuator isolation valve associated with the second inlet/outlet of the actuator; the first and second actuator isolation valves are biassed towards a closed position to close off the respective inlet/outlets and prevent a flow of fluid from the actuator through the inlet/outlets, and open and allow a flow of fluid from the actuator via the respective inlet/outlet in response to pressurised fluid being supplied to the other inlet/outlet.