Patent ID: 6964163
Filing Date: 2005-11-15
Classification: F16D,F16H

Abstract:
1. A hydrostatic circuit that provides check and relief functions for sequential fluid flow in opposite directions comprising: a motor having a first and second fluid outlets; a first fluid line fluidly connected to the first fluid outlet of the motor; a second fluid line fluidly connected to the second fluid outlet of the motor; a pump fluidly connected to the motor via the first and second fluid lines; a dual check and high pressure relief valve having a housing with a bore and first, second, and third passageways fluidly connected to the first and second fluid lines; said first fluid line fluidly connected to the first passageway; said second fluid line fluidly connected to the second passageway; a first poppet disposed within the bore and adapted to block at least one of the passageways; a spring operably connected to the first poppet and adapted to actuate the first poppet; a second poppet disposed within the bore operably connected to the spring; said dual check and high pressure relief valve adapted to provide check and relief functions for sequential fluid flow in opposite directions in the hydrostatic circuit; and a charge pump fluidly connected to the third passageway in the dual check and high pressure relief valve.