Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1991-12-11
1992-12-01
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 5719, B25B 1700
Patent
active
051671735
ABSTRACT:
Methods and apparatuses for imparting rotation to tubular members such as casing, pipe, or tubing; in one aspect such apparatus as a tong having passive jaws mounted on jaw holders which are slidable in recesses in a rotary, the jaw holders having an internally threaded bore which engages a threaded shaft which has a shoulder; in one aspect a power tong with an actuator mounted on a housing of the power tong and which has an advanceable drive shaft movable into a socket in a drive spindle of the threaded shaft so that rotation of the threaded shaft in one sense advances the jaw toward a center of the tong while rotation in the opposite sense withdraws the jaws, the drive shaft withdrawable to enable the rotary to rotate.
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patent: 4836064 (1989-06-01), Slator
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1990-91 General Services and Products Catalog Weatherford, 1989.
International Search Report, corresponding PCT application, No. EP9200646.
McClung Guy
Smith James G.
Weatherford / Lamb, Inc.
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