Rotary gad for ground drill

Details Rotary gad for ground drill Rotary gad for ground drill

1988-10-05

1990-04-03

Kisliuk, Bruce M.

Boring or penetrating the earth

With tool shaft detail

Helix or helically arranged structure

175394, E21B 1044

Patent

active

049132466

ABSTRACT:
A rotary gad for a ground drill includes an elongated front body having a front end and a rear end with front spiral blades being disposed on the outside of the front body. The front body has an elongated front axial passage, and a front core rod is disposed in the front axial passage. The front body is rotatable about the front core rod. The front core rod has a front end and a rear end. An elongated rear body has a similar construction and a pushing section is provided on a rear axial passage in the rear body. The pushing section has a front side and a rear side. A rear ball element is disposed between the rear side of the pushing section and the front end of a rear core rod, and a front ball element is disposed between the front side of the pushing section and the rear end of the front core rod. Coupling means couple the front and rear bodies to provide for rotation of the front and rear bodies in opposite directions about the front and rear core rods.

REFERENCES:
patent: 864544 (1907-08-01), Kessler et al.
patent: 1200119 (1916-10-01), Keeler
patent: 1522368 (1925-01-01), Hoke
patent: 2349033 (1944-05-01), Elliott
patent: 2352412 (1944-06-01), Sandstone
patent: 3391544 (1968-07-01), Daczko
patent: 3747701 (1973-07-01), Atkins et al.

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