Vehicle seat adjustment with actuator isolation valves
First Claim
1. 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.
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Accused Products
Abstract
A fluid powered vehicle seat adjustment system comprising a fluid actuator a source of pressurized hydraulic fluid and a controller. The fluid actuator including first and second inlet/outlet conduits, and the controller selectively controlling and directing pressurized fluid selectively to either the first or second inlet/outlets of the actuator. The actuator further comprising actuator isolation valves associated with each of the first and second inlet/outlets of the actuator. Each actuator isolation valve allowing a flow of fluid from the actuator only when pressurized fluid is supplied to the actuator and other isolation valve in order to prevent movement of the actuator except when pressurized fluid is supplied to the actuator.
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Citations
20 Claims
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1. A fluid powered vehicle seat adjustment system, the system comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A fluid powered vehicle seat adjustment system comprising a fluid actuator which includes a pair of isolation valves, each isolation valve allowing a flow of fluid from the actuator only when pressurised fluid is supplied to the actuator.
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16. A fluid powered vehicle seat adjustment system, the system comprising:
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a fluid actuator including a first inlet/outlet conduit and a second inlet/outlet conduit, the actuator being responsive to pressurised hydraulic fluid directed to and from the first and second inlet/outlets by the flow controller; a source of pressurised hydraulic fluid; and a controller for selectively controlling and directing pressurised hydraulic fluid selectively to either the first or second inlet/outlets of the actuator; and 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 each comprising a moveable valve member which is moveable from the closed position closing off the respective inlet/outlet to an open position allowing a flow of hydraulic fluid via the inlet/outlet, a biassing spring biasses the moveable portions towards a closed position to prevent a flow of hydraulic fluid from the actuator through the inlet/outlets, and an operating element which operates in response to pressurised hydraulic fluid supplied to the actuator to move the movable portion and open the actuator isolation valve and allow a flow of fluid from the actuator via the inlet/outlet.
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17. An assembly comprising:
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first and second members, wherein the first member is movably mounted relative to the second member; a fluid actuator including; a cylinder; a piston slidably disposed in the cylinder, the piston and cylinder defining first and second chambers; and a piston rod connected to the piston and the first member; a source of pressurised fluid; a controller in fluid communication with the source of pressurised fluid, the controller operable to selectively direct pressurised fluid from the source of pressurised fluid to the first and second chambers; a first actuator isolation valve in fluid communication between the first chamber and the controller, the first actuator isolation valve movable between an open position permitting the flow of fluid from the controller to the first chamber, and a closed position preventing the flow of fluid between the controller and the first chamber; and a second actuator isolation valve in fluid communication between the second chamber and the controller, the second actuator isolation valve movable between an open position permitting the flow of fluid from the controller to the second chamber, and a closed position preventing the flow of fluid between the controller and the second chamber, wherein in response to pressurised fluid being supplied to either of the first and second isolation valves from the controller, both of the first and second actuator isolation valves are moved to their open positions to permit fluid communication between the controller and the first and second chambers. - View Dependent Claims (18, 19, 20)
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Specification