| 摘要 |
A relatively lightweight wrench is disclosed herein which is characterized by a gear mounted at its periphery for rotation within a housing, said gear having a major and a minor gear sections removably secured to each other, a collet disposed within the gear for rotation therewith, said collet having an opening of a geometric shape to accommodate a work piece and an open side for admitting a work piece thereinto and a block cooperating with the minor gear section for closing-off the open side of the collet. The wrench is adapted to be opened by removing or opening the minor gear section and removing the collet block to expose a passage leading into the collet opening. In assembling the wrench, a work piece corresponding in shape to the collet opening is passed through the passage into the collet opening, the collet block is positioned in place to close-off the collet opening, and the minor gear section is again secured to the major gear section. In this operating position, the gear is turned by means of a drive means disposed within the housing for transferring torque to the gear for turning the gear, the collet and the work piece in unison.
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