Patent ID: 8347620

Claim:
A bypass/flushing valve for a hydrostatic system comprising: a valve body including a central bore, a first port in communication with the central bore, a second port in communication with the central bore, a third port in communication with the central bore and a fourth port in communication with the central bore; a shuttle valve located in the central bore and blocking flow through the central bore between the first port and the second port, when pressure at the second port is higher than at the first port the shuttle valve moves to allow flow passage between the first port and the third port, when the pressure at the first port is higher than at the second port the shuttle valve moves to allow flow passage between the second port and the third port; and a valve spindle disposed within the central bore, the spindle being movable between a first position, which blocks flow between the second port and the fourth port, and a second position, which allows for flow between the second port and the fourth port.