Rotary drive apparatus

Details Rotary drive apparatus Rotary drive apparatus

1978-10-06

1980-07-15

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 572, B25B 1700

Patent

active

042122120

ABSTRACT:
An improved rotary drive apparatus for a drill spinner, casing tong, or the like. The apparatus has a drive wheel and idler wheels adapted to drive an endless loop member trained around a cylindrical member to be driven. Pipe engaging rollers are utilized which have freely rotating flanges. The incporation of these freely rotating flanges increases torque output, reduces vibration, reduces wear on the flanges, and reduces likelihood of damage to the cylindrical member to be driven. Reaction rollers are utilized which eliminate or reduce vibration of the cylindrical member during operation of the apparatus and which increase torque output.

REFERENCES:
patent: 1760167 (1930-05-01), Palmer
patent: 1925970 (1933-09-01), Pennington
patent: 2544639 (1951-03-01), Calhoun
patent: 3774481 (1973-11-01), Goodman
patent: 3875826 (1975-04-01), Dreyfuss et al.
patent: 3892140 (1975-07-01), Fox et al.
patent: 3906820 (1975-09-01), Hauk
patent: 4084453 (1978-04-01), Eckel

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