Tools – Wrench – screwdriver – or driver therefor – Responsive to torque on work
Patent
1998-10-26
2000-04-25
Scherbel, David A.
Tools
Wrench, screwdriver, or driver therefor
Responsive to torque on work
81473, 81475, 81 5713, 81 5729, B25B 23151, B25B 23157
Patent
active
060530804
ABSTRACT:
A device for tightening a bolt or a nut has a tightening socket which is releasable from biting engagement with the bolt or nut by disengaging a clutch in a rotation transmission system after completion of tightening, and which is made readily removable from the bolt or nut. The device is characterized in that it comprises power transmission means for coupling a socket drive motor to the socket for power transmission, the clutch incorporated in the power transmission means for selectively effecting or interrupting power transmission from the motor to the socket by a sliding movement, and clutch control means for selectively moving the clutch to an engaged position or a disengaged position. The clutch is moved to the disengaged position by the clutch control means after the motor is deenergized, whereby residual torque delivered by the motor to the bolt or the nut is removed to preclude biting engagement of the socket with the bolt or nut.
REFERENCES:
patent: 4462282 (1984-07-01), Biek
patent: 4485698 (1984-12-01), Adman et al.
Fukuhara Shinji
Kaneyama Yasunobu
Matsumura Shozo
Sato Kenji
Umemoto Yoshiyuki
Maeda Metal Industries Ltd.
Scherbel David A.
Shakeri Hadi
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