E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
85/2
E21D 20/02 (2006.01) E21D 21/00 (2006.01) F16B 13/14 (2006.01)
Patent
CA 1251959
CLAUDE C. WHITE and FREDERICK CARR RESIN SECURED MINE ROOF ANCHOR ASSEMBLY ABSTRACT OF THE DISCLOSURE A mine roof anchor assembly for co-operation with a dual compartment resin and cartridge inserted into a mine roof opening, the anchor assembly including an elongate bolt that has a head at one end and is threaded at the opposite end thereof, a predetermined length of the bolt being unthreaded a rebar engaged with the threaded end of the elongate bolt; an expansion shell carried by the elongate bolt subjacent the rebar, the expansion shell including a plurality of wedge segments, a plurality of wall engaging ribs extending outwardly from the outer surface of the wedge segments, the inner wall of the wedge segments being tapered inwardly from top to bottom, a cone nut threadly engaged with the threaded portion of the elongate bolt and having an outer surface that is tapered inwardly from top to bottom and is adapted to engage the tapering inner walls of the wedge segments for expanding the wedge segments into securing engagement with the mine roof wall, and a nut threadedly engaged with the threaded portion of the elongate bolt in supporting engagement with the expansion shell, said nut being in predetermined spaced relation to the unthreaded portion of the bolt, whereby, upon rotation of the elongage bolt relative to the expansion shell and the nut, the shell and nut move longitudinally of the elongate bolt until the nut engages the unthreaded portion thereof, whereupon continued rotation of the bolt causes said cone nut to expand the wedge segments, the rebar being rotated with the elongate bolt, the number of revolutions of the bolt required to effect expansion of the wedge segments corresponding to the number of revolutions required to effect proper mixing of the resin and catalyst.
557637
Carr Frederick
White Claude C.
Birmingham Bolt Company
Smart & Biggar
Walter (jim) Resources Inc.
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