Importance

Loading Importance Indicators...

Abstract

A pneumatic rotary tool capable of operating in forward and reverse directions includes a housing and an output shaft projecting from the housing for transmitting torque to an object. An air motor drives rotation of the output shaft in the forward and reverse directions. Air passages extend from an air inlet to the motor for delivering pressurized air to the motor. One passage delivers air to the motor to power the motor to drive the output shaft in the forward direction and the other passage delivers air to the motor to power the motor to drive the output shaft in the reverse direction. A selector valve is disposed between the air inlet and the air passages such that fluid communication between the air inlet and the air passages is blocked except through the selector valve. The selector valve is movable with respect to the housing between a position in which the air inlet is in fluid communication with one passage and fluid communication with the other passage is blocked by the valve for operating the tool in the forward direction, and a position in which the air inlet is in fluid communication with the other passage and fluid communication with the one passage is blocked by the valve for operating the tool in the reverse direction. The selector valve is also constructed for selective adjustment of the selector valve to change the torque output of the motor.

Loading the Abstract Image...

First Claim