| 摘要 |
PROBLEM TO BE SOLVED: To quickly perform the fastening work and the loosening work of a bolt and nut in a stage of substantially having no rotational resistance, in a unidirectional ratchet wrench. SOLUTION: The ratchet wrench is constituted in such a manner that a rotatably engaged socket is attached to a body head, and the rotational direction of the socket is controlled by oscillating a gear handle formed in the socket, or a protrusion formed at the end of a lever rod so as to be freely engaged and released. In the ratchet wrench, the engaging part is separated down to a position where the rotation of the socket is not controlled by the rotational direction. COPYRIGHT: (C)2009,JPO&INPIT
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