Patent ID: 7909414

Claim:
A hydraulic circuit comprising: a spring applied-pressure released brake; a hydraulic motor; and a control in fluid communication with the brake and the motor, the control including a manifold having a bore and valve member received in the bore, the valve member being movable between a first position and a second position, when in the first position and in response to a pressure loss upstream of the motor, movement of fluid through the motor is inhibited such that rotation of an output shaft of the motor is inhibited, when in the first position and in response to a pressure loss upstream of the brake, the brake is spring applied, when in the first position the hydraulic motor receives pressure from a first pressure source, when in the second position the brake is in communication with an auxiliary pressure source through the bore for selectively supplying pressure to the brake, the auxiliary pressure source being at least partially defined by the valve member, and when in the second position and in response to pressure being applied by the first pressure source upstream of the control, the valve member is automatically reset to the first position wherein the control and the auxiliary pressure source are disposed in a single housing, the control including the valve member and an inner rod received in the valve member, and the inner rod being moveable with respect to the valve member to operate as the auxiliary pressure source for supplying pressure to the brake.