Patent ID: 6431846
Filing Date: 2002-08-13
Classification: B25B,F01C,Y10T

Abstract:
A reversible pneumatic motor assembly comprising:a housing including an inlet connection for connecting the motor assembly to a source of pressurized air, and an inlet passage extending inwardly into the housing from the inlet connection; a reversible motor in the housing, the housing further including a forward passage adapted for communicating with the inlet passage for delivering air to the motor for driving the motor in a forward direction and a reverse passage adapted for communicating with the inlet passage for delivering air to the motor for driving the motor in a reverse direction; a reversing valve assembly disposed in the housing between the inlet passage and the forward and reverse passages for selectively controlling fluid communication between the inlet passage and the reversible motor; an actuator mounted on the housing for actuating the valve assembly to selectively drive the motor in the forward and reverse directions; the reversing valve assembly comprising a tilt valve disposed in the inlet passage, the inlet passage having a valve seat for receiving the tilt valve to block the inlet passage, a spring for biasing the tilt valve against the valve seat, a shuttle located in the housing and connected to the actuator for transverse sliding motion in the housing; the shuttle and tilt valve being mounted in the housing for movement upon actuation of the actuator between a first position in which the tilt valve is tilted about an axis off of the valve seat and the shuttle is disposed to form a continuous air flow path from the inlet passage, through the shuttle and into the forward passage for driving the motor in the forward direction, a second position in which the tilt valve is tilted about the axis off of the valve seat and the shuttle is disposed to form a continuous air flow path from the inlet passage, through the shuttle and into the reverse passage for driving the motor in the reverse direction, and a third position in which the tilt valve seats on the valve seat to prevent flow of air from the inlet passage to the motor.