Patent ID: 6332317
Filing Date: 2001-12-25
Classification: F16H

Abstract:
An apparatus for use with a hydrostatic transmission, comprising:a sump for containing hydraulic fluid;a hydrostatic pump and motor;a hydraulic circuit fluidly connecting the pump and the motor;a valve operatively connected to the hydraulic circuit for opening and closing the hydraulic circuit to the sump;a bypass mechanism mounted adjacent to said valve, said mechanism being moveable between a first position and a second position, wherein the bypass mechanism engages said valve in said first position to allow the valve to open the hydraulic circuit to the sump and said bypass mechanism disengages from said valve in the second position to allow the valve to close the hydraulic circuit to the sump; andwherein said valve can override said bypass mechanism in said first position to close the hydraulic circuit when the pressure of said hydraulic fluid in said circuit reaches a predetermined pressure.