Rotary for use in a power tong

Details Rotary for use in a power tong Rotary for use in a power tong

E - Fixed Constructions

21

B

E21B 19/16 (2006.01)

Patent

CA 2089638

The rotary (2) of a power tong (1) contains a master piston and cylinder (19) which, when actuated, delivers hydraulic fluid to slave hydraulic piston and cylinders (14, 15) which apply active jaws (8, 9) against a pipe (5). The master piston and cylinder (19) can be depressed by a plunger (29) mounted on top the tong housing (45). The active jaws (8, 9) can be released by opening one or both valves (39, 40) mounted on the rotary (2) and actuable by depressing a ring (49) mounted on the top of the tong housing (45).

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