Device for gripping and suspending drill pipe stand

Details Device for gripping and suspending drill pipe stand Device for gripping and suspending drill pipe stand

1988-06-30

1990-01-16

Cherry, Johnny D.

Handling: hand and hoist-line implements

Grapple

Pivoted jaws

294 91, 294117, B66C 144

Patent

active

048938602

ABSTRACT:
According to the invention, the device comprises clamping elements hinged in a housing provided with a cut-out and a control system formed by a group of levers which are connected with a hoisting line. Besides, one of the levers is hinged to the housing and the other levers, to the clamping elements.

REFERENCES:
patent: 673679 (1901-05-01), Foster et al.
patent: 910062 (1909-01-01), Holmberg
patent: 1223960 (1917-04-01), Gilmartin
patent: 1396317 (1921-11-01), Boyter
patent: 1548265 (1925-08-01), Hall
patent: 1963693 (1934-06-01), Cole et al.
patent: 2300980 (1942-11-01), Sinclair
patent: 2328167 (1943-08-01), Ratigan

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