| 摘要 |
<p>A pneumatic ratchet wrench having a pneumatically actuated reversing device includes two cylinders (31) disposed downstream of two branch conduits (52), and two plungers (32), each slidable in the respective cylinder (31) by a burst of pressurized air from the branch conduits (52) to bring an actuator (41) into engagement with a direction selector (24) so as to turn the direction selector (24) in a selected one of clockwise and counterclockwise directions for unidirectionally rotating a drive body (22). The operation of direction selection is easy and handy to conduct.</p> |
