Hydraulic suspension with a lock-out mechanism for an off-highway vehicle
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United States of America Patent
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May 27, 2008
Grant Date -
Nov 17, 2005
app pub date -
May 17, 2004
filing date -
May 17, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vehicle has an axle connected to a frame by at least one hydraulic cylinder with two chambers separated by a piston. A hydraulic circuit controls flow of fluid between two cylinder chambers and between the chambers and an accumulator to dampen motion of the frame relative to the axle. The hydraulic circuit includes a control valve and a pair of check valves arranged so that the single control valve is able to lock-out the cylinder to emulate a rigid connection of the frame to the axle, as needed.
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