Compensating jaw assembly for power tongs

Details Compensating jaw assembly for power tongs Compensating jaw assembly for power tongs

1985-12-26

1987-12-01

Larson, Lowell A.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 572, 81 5721, B25B 1700

Patent

active

047095997

ABSTRACT:
A pipe die linkage for power tongs has a preloaded spring between a force producing cam follower and pipe die of such strength and preload that the die serrations will be forced to adequately bite into the pipe. Bias resisted overtravel will prevent pipe crushing at high torque levels, as the cam follower is forced more toward the pipe.

REFERENCES:
patent: 1690007 (1928-10-01), Greve
patent: 1690008 (1928-10-01), Greve
patent: 1876747 (1932-09-01), Rainsford
patent: 3371562 (1968-03-01), Kelley
patent: 3417599 (1968-12-01), Burns
patent: 3589742 (1971-06-01), Flick
patent: 4250773 (1981-02-01), Haynes
patent: 4290304 (1981-09-01), Eckel
patent: 4565081 (1986-01-01), Massee

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