Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1998-08-01
1999-10-12
Scherbel, David A.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 55, 81 5736, 81 5722, B25B 1700
Patent
active
059641282
ABSTRACT:
A bolt tightening device for tightening torque controlled bolts each having at one end thereof a tip to be sheared has an outer socket engageable with a nut, and an inner socket engageable with the tip, the inner socket being axially slidable relative to the outer socket and biased outward by a spring, the two sockets being coupled to planetary gear mechanisms for delivering opposed torques to the respective sockets, a knockout pin extending into the inner socket for forcibly removing the bolt tip as sheared. The knockout pin for knocking out the sheared bolt tip is made contractable by being composed of a shank and a head provided on the shank and biased outward of the shank by a spring, The length of backward stroke of the knockout pin required for knocking out the tip is minimized by contracting the pin to thereby shorten the length of the device.
REFERENCES:
patent: 5490439 (1996-02-01), Matsumura et al.
patent: 5582079 (1996-12-01), Matsumura et al.
patent: 5699702 (1997-12-01), Myers
Kaneyama Yasunobu
Matsumura Shozo
Sato Kenji
Yano Daijiro
Maeda Metal Industries Ltd.
McDonald Shantese
Scherbel David A.
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