E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
61/67
E21D 15/14 (2006.01) E21D 23/00 (2006.01) E21D 23/08 (2006.01)
Patent
CA 1074138
PREAMBLE TO DISCLOSURE BE IT KNOWN that LEWIS ROBERT HOWER and MALCOLM WAKE, both British subjects and both of Univorsal Works, Horbury, Wakefield, England have made an invention entitled:- "MINE ROOF SUPPORTS" the following disclosure contains a correct and full description of the invention and of the best mode known to the Inventors of taking advantage of the same. ABSTRACT OF THE DISCLOSURE A mining installation comprises an armoured conveyor made up of a plurality of pans articulated together end-to-end, a plurality of hydraulically powered, self- advancing mine roof supports located side by side along the goaf side of the conveyor, each roof support being connected to a pan by one or more double-acting advancing rams, and each having a base means incorporating a pair of spaced, elongate base members seating on a mine floor, each support further having a forward end intended to be located, in use, adjacent the goaf side of the conveyor and a rearward end intended to be remote from the conveyor, a rail located between the base members and attached at a forward end thereof to a pan of the conveyor, and a lifting jack carried by the base members at or near the front end thereof and operable on the rail to lift the front ends of the base members from the mine floor and in this condition be advanced towards the conveyor by operation of the one or more double-acting advancing rams.
306027
Bower Lewis R.
Wake Malcolm
LandOfFree
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