Tools – Wrench – screwdriver – or driver therefor – Slidable jaw adjustments
Patent
1980-11-10
1982-11-16
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Slidable jaw adjustments
81148, B25B 1314
Patent
active
043589723
ABSTRACT:
The self adjusting pipe wrench includes a movable jaw that is spring urged to its closed position with respect to its fixed jaw. A lock element holds the movable jaw in a open, fixed position until it is disengaged from the movable jaw, whereupon the movable jaw moves into engagement with a nut, or the like, or to its closed position. A housing is located about the path of movement of the leg of the movable jaw and extends between the lock element and the joke of a handle to maintain the lock element out of force-bearing relationship with respect to the yoke.
REFERENCES:
patent: 1082112 (1913-12-01), Cutler
patent: 1593337 (1926-07-01), Johnson et al.
patent: 2050102 (1936-08-01), Kujala et al.
patent: 2760396 (1956-08-01), Simpson
patent: 2878702 (1959-03-01), Anderson
patent: 2914980 (1959-12-01), Flaig
patent: 3817128 (1974-06-01), Evans
patent: 3996820 (1976-12-01), Tuell
Smith James G.
Thomas George M.
Tuell Industries, Inc.
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