Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1991-10-21
1992-11-10
Meislin, D. S.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 5714, 81 5715, 81 5718, 81 572, B25B 1350
Patent
active
051614391
ABSTRACT:
Interfering bosses are provided on the jaw and jaw link forming a pivoting jaw assembly for a power tong or back-up. The bosses are arranged to interfere and prevent over-center rotation of the jaw with respect to the jaw link. The jaw is pivotally mounted on the jaw link with a pin journaled in an aperture which is elongated in the direction of the axis of the bosses so that the jaw can be rotated over-center when desired.
REFERENCES:
patent: 4346629 (1982-08-01), Kinzbach
patent: 4869137 (1987-09-01), Slator
Kanz Jack A.
Meislin D. S.
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