Work holders – Relatively movable jaws – Means to actuate jaw
Patent
1978-11-29
1980-02-12
Watson, Robert C.
Work holders
Relatively movable jaws
Means to actuate jaw
81356, B34Q 302, B25B 1316
Patent
active
041880234
ABSTRACT:
Disclosed is a clamping device having a locking type mechanism which is particularly adaptable for use by well drillers, well repairmen and pump installers in securely holding pipe. The device comprises a base member having a bore and having an attached jaw, a sliding member partially located within the bore of the base member, a jaw attached to the portion of the sliding member outside the bore of the base member. The jaw on the sliding member is adapted to cooperate with the jaw attached to the base member to clamp about an object. The device further includes a clamping mechanism including a lever pivotably attached to the base member at a point on the arm spaced from the end of the lever, and a connecting linkage pivotably attached near the end of the lever and to the slidable member. In operation, upon rotation of the free end of the lever towards the base member, the jaw of the slidable member is caused to move towards the jaw of the base member and, upon sufficient rotation of the lever toward the base member, the longitudinal axis of the connecting linkage passes through the axis of the pivot connecting the base member and the lever so as to lock the clamping mechanism.
REFERENCES:
patent: 2691911 (1954-10-01), Gren
patent: 2729127 (1956-01-01), Watanabe
patent: 3220691 (1965-11-01), Dudley
patent: 3578307 (1971-05-01), Lock
Reinart Joseph
Whaley Kent
Watson Robert C.
Whaley Kent
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