Drill steel centralizer

Details Drill steel centralizer Drill steel centralizer

1978-02-28

1980-01-08

Pate, III, William F.

Boring or penetrating the earth

With above-ground means for handling drilling fluid or cutting

Fluid or cuttings directing or receiving means engaging bore...

175210, 175220, 408174, E21C 900

Patent

active

041824245

ABSTRACT:
A feed beam for a rock drill has a drill steel centralizer at its front end. The centralizer comprises a thick, cylindrical rubber sleeve which has a clearance to the drill steel. An annular piston is arranged to axially compress the rubber sleeve axially so that it is radially deformed into contact with the drill steel to centralize the drill steel. The centralizer is built together with a dust collecting hood.

REFERENCES:
patent: 2475429 (1949-07-01), Humason
patent: 2590958 (1952-04-01), Goodrich
patent: 2646256 (1953-07-01), Lobbert
patent: 2913226 (1959-11-01), Pritchard et al.
patent: 3991838 (1976-11-01), Clark

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