AIR WRENCH Russian patent published in 2015 - IPC B25B21/02 

FIELD: machine building.

SUBSTANCE: air wrench comprises a rotor with cams, two coaxial bushes coupled by blades, and air feeding and outlet ports, and a striker with cams which embraces the rotor bushes and is mounted so that to able of reciprocating rotary movement and interaction of its cams with the rotor cams, an air distributor with air feeding and outlet ports coaxial to the rotor ports respectively. The striker is fitted by blades forming working chambers together with rotor blades. The air distributor is mounted in the axial hole of the rotor, herewith periodic communication of working chambers with the air feeding line and the atmosphere as well as interaction of its lever with the striker are provided. A wrench head and an overrunning clutch for kinematic connection of the rotor to the casing are provided. A starting slide valve is installed in the air distributor coaxially and can rotate together with it, the valve is pressed by a spring in axial direction. Air feeding and outlet ports of the starting slide valve are coaxial to the said ports of the air distributor respectively. Additional air feeding and outlet ports are provided in the air distributor, rotor and starting slide valve, the said additional ports of the air distributor and the rotor can be matched with the said additional ports of the starting slide valve respectively.

EFFECT: improved air distribution system to provide for reliable restart and simplified reversing.

2 cl, 13 dwg