| 摘要 |
A reverse apparatus for an air impact wrench in which pressurized air supplied to an air supply passage provided within a grip is fed via the reverse apparatus to an air motor accommodated within an impact wrench main body, and rotational torque output from the air motor is transmitted to an anvil via an impact mechanism. The reverse apparatus includes a cylindrical bush disposed in a lower portion of the impact wrench main body; a valve member slidably disposed within the bush and having an end projecting from the lower portion of the impact wrench main body; and a cam mechanism disposed within the bush and operatively coupled to the valve member so as to position the valve member to first and second axial positions alternatively whenever the projecting end of the valve member is pushed inward.
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