Patent ID: 8375832

Claim:
A compact one touch pneumatic wrench, comprising a front cover, a percussion assembly, a gasket, a front bearing, a front end cap, a rotor, blades, a swing member, a rotating valve, a fastener, a washer, a cylinder, an air valve sleeve, a rear bearing, a speed adjusting valve, a housing, a speed adjusting button, a fastening bolt and a connecting bolt; a rear end of a central axle of the percussion assembly being connected with the front bearing; the front bearing being inserted into a central hole of the front end cap; a front end of the rotor being inserted through the front bearing and into a hole of the rear end of the central axle of the percussion assembly, the rotor driving the percussion assembly to rotate together; the blades being inserted into grooves on an outer wall of the rotor, a front end surface of the cylinder being sealedly connected to the front end cap to form a sealed chamber to seal the rotor and the blades therein; a rear end of a central axle of the rotor being extended out of a central hole of the cylinder and the rear bearing being fitted thereon; a front end of the central axle of the percussion assembly being extended out of a hole of the front cover, the housing being connected to the front cover with four connecting bolts; the cylinder having an air valve sleeve hole for insertion of the air valve sleeve to achieve a tight connection, one end of the speed adjusting valve being formed with a speed adjustment air inlet and inserted in the air valve sleeve, and an opposite end of the speed adjusting valve being extended out of the housing and connected to the adjusting button through the fastening bolt so that the adjusting button is turned to adjust the speed; one end of the rotating valve being formed with an air inlet and inserted in the air valve sleeve and an opposite end of the rotating valve being inserted in the front cover, by swaying the swing member, the rotating valve cooperating with the swing member to switch a clockwise/counterclockwise rotation of a motor.