Rock bolting equipment

Details Rock bolting equipment Rock bolting equipment

1972-11-16

1977-03-08

Purser, Ernest R.

Tool driving or impacting

Hammer or tool shaft reciprocated by gripping means which...

With fixed means cyclically contacted by grip structure

173161, 173169, 173170, E21C 110

Patent

active

040108066

ABSTRACT:
Equipment for drilling holes in mine roofs for the purpose of rock bolting comprises an intermediate portion having mounted on and extending from it at one end a telescopic leg and mounted on and extending from it at the other end a drill rod, a hydraulic motor mounted on the intermediate portion and coupled to the drill rod, first valve means adapted to be connected to a pressure fluid source for supplying pressure fluid to the leg for extending it or for releasing fluid from the leg, second valve means adapted to be connected to a pressure source for supplying pressure fluid to the hydraulic motor for driving it or for releasing fluid from the motor and means for controlling the first and second valve means.

REFERENCES:
patent: 1682438 (1928-08-01), Stuthridge et al.
patent: 2320874 (1943-06-01), Lehman
patent: 2461528 (1949-02-01), Curtis
patent: 2689547 (1954-09-01), Pearson
patent: 2804751 (1957-09-01), Schroeder
patent: 2843361 (1958-07-01), Miller
patent: 3105416 (1963-10-01), Hecke
patent: 3275089 (1966-09-01), Kaiser et al.
patent: 3571874 (1971-03-01), Von Arx

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