Drill steel drive unit

Details Drill steel drive unit Drill steel drive unit

1987-04-06

1989-05-30

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

Tool-support

With tool-retaining means

811244, 175320, 279 14, B23B 4514, E21C 900

Patent

active

048345946

ABSTRACT:
A chuck to be power driven for rotating drill bits in the mining and construction fields. The chuck is designed to drive one or more telescoped drill steels which carry a mining bit and is designed to drive drill steels with square drive ends, large hexagonal drive ends, small hexagonal drive ends and large and small hexagonal ends as well as roof bolt units without modification.

REFERENCES:
patent: 2878701 (1959-03-01), Weersma
patent: 4226290 (1980-10-01), McSweeney
patent: 4339006 (1982-07-01), Bower, Jr. et al.
patent: 4558976 (1985-12-01), Begluitti

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