Laterally adjustable multiple head

Details Laterally adjustable multiple head Laterally adjustable multiple head

1978-12-18

1981-04-28

Foss, J. Franklin

Supports

Machinery support

Movable machine

173 43, 173 52, 248654, F21C 110, E21C 500

Patent

active

042640512

ABSTRACT:
Drilling equipment comprises a single boom supporting a plurality of drilling masts each provided with a drilling machine, adjustment means being provided to simultaneously adjust the relative positions of the drilling masts.

REFERENCES:
patent: 2675996 (1954-04-01), Gunning
patent: 2731235 (1956-01-01), Dellner
patent: 3295800 (1967-01-01), Quarnstrom
patent: 3493200 (1970-02-01), Huffman

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