Mounting for rock drills

Details Mounting for rock drills Mounting for rock drills

1976-02-12

1977-01-04

Foss, J. Franklin

Supports

Pipe or cable

Extending through plate

173 38, 248 16, E21C 511, E21C 900, E21C 1100

Patent

active

040008738

ABSTRACT:
A known extendable and retractable mounting for rock drills is described comprising a drill feed leg, a vertical support, which may be mounted on a truck and a counter-balancing device for counterbalancing the drill during movement vertically from one drilling position to another. The new feature described consists in applying a turning moment to the vertical support by means of a spring, two springs or a fluid cylinder and piston arrangement. The turning moment counteracts a resultant force tending to move the feed leg sideways.

REFERENCES:
patent: 2877660 (1959-03-01), Rush
patent: 3149694 (1964-09-01), Smithee
patent: 3181623 (1965-05-01), Lindgren
patent: 3481409 (1969-12-01), Westerlund
patent: 3537675 (1970-11-01), Cycowicz

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