Drill

Details Drill Drill

1976-09-13

1978-08-15

Hafer, Robert

Tool driving or impacting

Impacting devices

With means for rotating tool

279 193, B25D 900

Patent

active

041065735

ABSTRACT:
This invention relates generally to improved means for securing a working member within a rotary tool and is described hereinbelow with particular reference to a percussively actuatable striking bar secured by the novel securing means hereof within a percussive rock drilling apparatus.

REFERENCES:
patent: 1822115 (1931-09-01), Shepherd
patent: 2776840 (1957-01-01), Schorer
patent: 3797584 (1974-03-01), Bailey et al.

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