Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1981-12-11
1984-03-13
Jones, Jr., James L.
Tools
Wrench, screwdriver, or driver therefor
Machine
294114, B25B 1700
Patent
active
044360029
ABSTRACT:
A power tong unit which is operable as a closed head or open head unit. The jaws of the tong unit are rotatable to an extended pipe gripping position from either of opposite directions to make-up or break-out pipe from a single retracted position. An improved reversal means controls the direction of rotation of the jaws between the make-up and break-out positions.
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patent: 4372026 (1983-02-01), Mosing
Baker Ronald
Kennington Kerry S.
Felsman Robert A.
Gunter Jr. Charles D.
Hughes Tool Company
Jones Jr. James L.
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