| 摘要 |
An improved gear wrench which is particularly adapted for tightening or loosening nuts or bolts in tight places. The gear wrench comprises an elongated first member which carries at one of its ends a housing which rotatably receives a gear wheel therein. A tubular member is secured along its length to the first member and rotatably receives an elongated shaft which includes one end portion which extends beyond the corresponding end portion of the tubular member and is disposed proximate the gear wheel carried by the housing. A pinion gear is secured to this end portion of the shaft and includes teeth which mesh with the teeth of the gear wheel such that upon rotation of the shaft, a corresponding rotation is imparted to the gear wheel and a stud carried thereon which is adapted for receiving a suitable conventional socket. The teeth on the gear wheel and the surface of the gear wheel serve to define a recess which receives the end portion of the socket which is assembled on the stud. The recess serves to control the size of the socket which can be mounted on the wrench to assist in matching the strength of the wrench with the work done by it.
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