Vehicle stabilizer

Claim 2

In a vehicle having an oscillatable frame means pivotally mounted to an axle, stabilizing means mounted on said vehicle operatively connected between said frame and said axle, a fluid power source for powering said stabilizing means, means responsive to a side force exerted on said vehicle and which operatively connects said stabilizing means to said fluid power source to maintain a constant frame attitude relative to said axle, and means operatively connected between said power source and said stabilizing means for blocking road shock pressures from reaching said power source when said axle is suddenly pivoted relative to said frame, and wherein said force responsive means comprises a valve means which directs hydraulic fluid to said stabilizing means, and wherein said valve means is a rotary servovalve having a Sleeve operatively connected to said axle and a spool operatively connected to said frame.

Claim 3

In a vehicle having an oscillatable frame means pivotally mounted to an axle, stabilizing means mounted on said vehicle operatively connected between said frame and said axle, a fluid power source for powering said stabilizing means, means responsive to a side force exerted on said vehicle and which operatively connects said stabilizing means to said fluid power source to maintain a constant frame attitude relative to said axle, and means operatively connected between said power source and said stabilizing means for blocking road shock pressures from reaching said power source when said axle is suddenly pivoted relative to said frame, and wherein said force responsive means comprises a valve means which directs hydraulic fluid to said stabilizing means, and wherein said valve means is a servovalve having a first portion fixed to said axle and a second portion fixed to said frame.

Claim 4

In a vehicle having an oscillatable frame means pivotally mounted to an axle, stabilizing means mounted on said vehicle operatively connected between said frame and said axle, a fluid power source for powering said stabilizing means, means responsive to a side force exerted on said vehicle and which operatively connects said stabilizing means to said fluid power source to maintain a constant frame attitude relative to said axle, and means operatively connected between said power source and said stabilizing means for blocking road shock pressures from reaching said power source when said axle is suddenly pivoted relative to said frame, and wherein said force responsive means comprises a valve means which directs hydraulic fluid to said stabilizing means, and wherein said valve means is a servovalve having a first portion fixed to said axle and a second portion fixed to said frame.

Claim 5

In a vehicle having an oscillatable frame means pivotally mounted to an axle, stabilizing means mounted on said vehicle operatively connected between said frame and said axle, a fluid power source for powering said stabilizing means, means responsive to a side force exerted on said vehicle and which operatively connects said stabilizing means to said fluid power source to maintain a constant frame attitude relative to said axle, and means operatively connected between said power source and said stabilizing means for blocking road shock pressures from reaching said power source when said axle is suddenly pivoted relative to said frame, and wherein said force responsive means comprises a valve means which directs hydraulic fluid to said stabilizing means, and further including means for transferring fluid from said valve means to said stabilizing means, and accumulator means operatively connected to said transfer means for accepting and replacing fluid displaced from said stabilizing means upon sudden pivotal movement of said axle.

Claim 6

In a vehicle having an oscillatable frame means pivotally mounted to an axle, stabilizing means mounted on said vehicle operatively connected between said frame and said axle, a fluid power source for powering said stabilizing means, means responsive to a side force exerted on said vehicle and which operatively connects said stabilizing means to said fluid power source to maintain a constant frame attitude relative to said axle, and means operatively connected between said power source and said stabilizing means for blocking road shock pressures from reaching said power source when said axle is suddenly pivoted relative to said frame, and wherein said force responsive means comprises a valve means which directs hydraulic fluid to said stabilizing means, and further including means for transferring fluid from said valve means to said stabilizing means, and accumulator means operatively connected to said transfer means for accepting and replacing fluid displaced from said stabilizing means upon sudden pivotal movement of said axle.

Claim 7

The vehicle of claim 3 wherein said shock blocking means comprises a check valve situated so as to block hydraulic fluid from traveling from said valve means to said fluid power source.

Claim 8

The vehicle of claim 4 wherein said valve means comprises a servovalve operatively fixed between said frame and said axle.

Claim 9

The vehicle of claim 5 wherein said servovalve is a rotary servovalve having a first part fixed to said axle and a second part fixed to said frame.

Claim 10

In a vehicle having a frame, an axle, pivot means mounting sad frame to said axle for oscillatory movement, fluid controlled retractible and extendable stabilizing means deposed on either side of said pivot means connecting said frame and said axle for normally maintaining the same in substantial parallel relation, one to the other, one of said stabilizing means being retracted and one of said stabilizing means being extended in response to a side force being applied to said frame, a source of fluid, and fluid means interconnecting said source and said stabilizing means and being responsive to rotation of the frame due to said side force to cause the fluid to enter the retracted and extended stabilizing means to urge the same back to a position where the frame and axle are parallel one to the other.

Claim 11

In a vehicle having a frame, an axle, pivot means mounting sad frame to said axle for oscillatory movement, fluid controlled retractible and extendable stabilizing means deposed on either side of said pivot means connecting said frame and said axle for normally maintaining the same in substantial parallel relation, one to the other, one of said stabilizing means being retracted and one of said stabilizing means being extended in response to a side force being applied to said frame, a source of fluid, and fluid means interconnecting said source and said stabilizing means and being responsive to rotation of the frame due to said side force to cause the fluid to enter the retracted and extended stabilizing means to urge the same back to a position where the frame and axle are parallel one to the other.

Claim 12

The vehicle of claim 7 wherein the fluid means responsive to pivotal rotation of said frame comprises stabilizing means operatively connected between said frame and said axle, further including a valve means operatively connected between said frame and said axle, which valve means senses frame rotation and directs fluid from said fluid source to said stabilizing means such that said stabilizing means is powered to reestablish parallel relation between said frame and said axle.

Claim 13

The vehicle of claim 8, wherein the means responsive to pivotal rotation further comprises a means for blocking road shock pressures from reaching said fluid power source operatively connected to said fluid power source, and accumulator means operatively connected to said stabilizing means for accepting and replacing fluid from said stabilizing means upon sudden pivotal movement of said axle.

Claim 14

The vehicle as claimed in claim 9 wherein said valve means comprises a servovalve with a first part fixed to said axle and a second part fixed to said frame.