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IMPROVEMENTS IN OR RELATING TO MEANS FOR DIRECTING OR MANOEUVRING MINERAL WORKING OR LIKE EQUIPMENT IN RELATION TO A MINERAL FACE OR TERRAIN TO BE MINED OR WORKED WITH THE AID OF SUCH EQUIPMENT
IMPROVEMENTS IN OR RELATING TO MEANS FOR DIRECTING OR MANOEUVRING MINERAL WORKING OR LIKE EQUIPMENT IN RELATION TO A MINERAL FACE OR TERRAIN TO BE MINED OR WORKED WITH THE AID OF SUCH EQUIPMENT
1276658 Rock drill GULLICK DOBSON Ltd 12 Sept 1969 [3 Oct 1968] 46880/68 Heading B3C [Also in Divisions B4 and E1] A device comprises two units 10, 11, at least one of which is adapted to carry a mineral working tool, each unit having opposed jacks 20, 20a or 21, 22 for engaging a floor and a roof so as to secure the unit, and the units being pivotally interconnected by rams 12, 13 so that by operation of the jacks and the rams either of the units can be moved relative to the other unit. The jacks 20 ... 22 are formed by hydraulic rams and each ram 12, 13 has connected thereto steering rams such as 14, 17. In a second embodiment, Fig. 5 (not shown), one unit slidably receives a member pivoted to the other unit, the member being extensible by an hydraulic ram.
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