Regenerative hydrostatic steering system
Abstract
Abstract A HYDRAULIC POWER STEERING SYSTEM INCLUDING A ONE-PIECE HYDROSTATIC UNIT CONNECTED TO A MAIN POWER FLUID PUMP AS SEMBLY AND EMPLOYING AN AXIALLY SHIFTABLE DIRECTIONAL CONTROL SLEEVE VALVE AND A SINGLE HYDRAULIC WORK CYLINDER CONNECTED TO THE HYDROSTATIC UNIT. THE FREE CROSS-SECTIONAL AREA ON ONE SIDE OF THE PISTON OF THE WORK CYLINDER IS TWICE THAT OF THE OTHER SIDE. THE HYDROSTATIC UNIT INCLUDES MANUALLY CONTROLLED OPERATING SHAFT WHICH, WHEN TURNED IN ONE DIRECTION, IS EFFECTIVE TO SHIFT THE SLEEVE VALVE AXIALLY IN ONE DIRECTION, THEREBY CAUSING ALL THE FLUID BEING PUMPED FROM THE MAIN PUMP ASSEMBLY TO THE HYDROSTATIC UNIT, AS WELL AS ALL THE FLUID BEING EXPELLED FROM THE REDUCED AREA END OF THE WORK CYLINDER, TO ENTER THE INCREASED AREA END OF THE WORK CYLINDER. WHEN THE OPERATING SHAFT IS TURNED IN AN OPPOSITE DIRECTION THE SLEEVE VALVE IS SHIFTED AXIALLY IN AN OPPOSITE DIRECTION, THEREBY CAUSING ALL THE FLUID FROM THE MAIN PUMP ASSEMBLE TO ENTER THE REDUCED AREA END OF THE WORK CYLINDER AND THE FLUID BEING EXPELLED FROM THE INCREASED AREA END TO RETURN TO THE MAIN PUMP ASSEMBLY.
Inventors
- 👤 Raymon L Goff
- 👤 Charles V Gagen
Bibliographic Details
Claims Analysis
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