Patent ID: 7044482
Filing Date: 2006-05-16
Classification: B60G

Abstract:
1. A locking anti-motion suspension circuit for a work vehicle having a chassis, a control arm pivotally coupled to the chassis and a ground-engaging wheel coupled to the control arm, the vehicle including at least one hydraulic cylinder that is coupled to and between the control arm and the chassis to control the position of the wheel with respect to the chassis, the circuit comprising: a gas-charged accumulator selectively connectable to said cylinder to absorb vehicular shocks by receiving hydraulic fluid ejected from said cylinder during travel over the ground; a first hydraulic valve controllable to selectively connect said cylinder and said accumulator; a hydraulic tank for receiving exhausted hydraulic fluid; a hydraulic pump configured to provide a supply of pressurized hydraulic fluid; and a second hydraulic valve fluidly coupled to and between said tank and pump and said accumulator, said second valve being responsive to fluid pressure in said cylinder and fluid pressure in said accumulator to maintain said fluid pressure in said accumulator equal to said fluid pressure in said cylinder.