Fluid operated undercutter

Details Fluid operated undercutter Fluid operated undercutter

1976-12-13

1979-05-08

Pate, III, William

Boring or penetrating the earth

With below-ground tool drive prime mover

Plural below-ground drive prime movers

173 31, 173 96, 173101, 175 99, 175103, 175266, E25B 900

Patent

active

041531213

ABSTRACT:
The invention herein relates to an undercutting device which is provided with a substantially tubular body adapted to be placed within a parallel-sided hole. A rotary percussion head is provided at one end of the body and has one or more cutting tools which extend radially therefrom at an obtuse angle and which cutting tools are adapted to cut outwardly from the radius of the body, means are provided for rotating the head about the axis of the body and for operating the percussion head at one predetermined depth in the hole so that the cutting tools may act on the wall of the parallel-sided hole.

REFERENCES:
patent: 1236371 (1917-08-01), Gilman
patent: 1461713 (1923-07-01), Gilman et al.
patent: 2942850 (1960-06-01), Heath
patent: 3101499 (1963-08-01), Greenfield
patent: 3386250 (1968-06-01), Lawrence et al.

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