| 摘要 |
PROBLEM TO BE SOLVED: To provide a tensionless power ratchet wrench assembly having a tensionless head, wherein operation of a ratchet mechanism does not require a tensioning means for applying frictional force against the ratchet mechanism to prevent rotational movement of the ratchet mechanism. SOLUTION: The tensionless power ratchet wrench assembly comprises a first gear, a second gear, and the ratchet mechanism having a drive main body. The drive main body is coupled to the first gear and ratcheting with the second gear, and coupled to the second gear and ratcheting with the first gear, alternately. COPYRIGHT: (C)2005,JPO&NCIPI
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