Kelly and kelly drive bushing

Details Kelly and kelly drive bushing Kelly and kelly drive bushing

1979-12-13

1982-04-20

Lall, P. S.

Boring or penetrating the earth

Below-ground impact members

With releasable means to detachably retain telescoping...

175195, F16D 300

Patent

active

043252338

ABSTRACT:
An improved kelly is provided with a drive section which has a uniform cross section defined by three generally flat drive sides alternating with three generally arcuate sides. The three arcuate sides are spaced an equal radii from the central axis of the kelly and the three flat drive sides lie in planes that form an equilateral triangle therebetween.
The improved kelly is driven by an improved mating kelly drive bushing which has three rollers positioned so as to evenly transmit torque to the three flat drive sides of the kelly simultaneously.

REFERENCES:
patent: 1067330 (1913-07-01), Griffin
patent: 2202446 (1940-05-01), Esseling
patent: 2210506 (1940-08-01), Smith
patent: 2338093 (1944-01-01), Caldwell
patent: 2620163 (1952-12-01), Stone
patent: 2829866 (1958-04-01), Colquitt
patent: 2859939 (1958-11-01), Petrell
patent: 2952826 (1960-09-01), Webster et al.
patent: 3035424 (1962-05-01), Spiri
patent: 3099917 (1963-08-01), Spiri
patent: 3433033 (1969-03-01), Watson
patent: 3513665 (1970-05-01), Crickmer
patent: 3527064 (1970-09-01), Crickmer

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