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