E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
85/2
E21D 20/02 (2006.01)
Patent
CA 1251960
Case 4036 CLAUDE C. WHITE and FREDERICK CARR MINE ROOF ANCHOR ASSEMBLY ABSTRACT OF THE DISCLOSURE A mine roof anchor assembly for co-operation with a dual compartment resin and catalyst cartridge inserted into a mine roof opeining, the anchor assembly including an elongate bolt having a head at one end and being threaded for a portion of its length at its other end; a rebar engaged with the threaded end of the elongate bolt, the rebar being arranged to rupture the resin and catalyst cartridge when the assembly is forced upwardly into a mine roof opening, thereby permitting the resin and catalyst to gravitate downwardly between the wall of the opening and the rebar; and expansion shell carried by said elongate bolt subjacent said rebar, the expansion shell including a plurality of wedge segments having wall-engaging ribs extending outwardly from their outer surfaces, the inner wall of the wedge segments being tapered inwardly from top to bottom; a bail member having spaced legs, the lower ends of which are connected to diametrically opposite portions of the upper extremities of the wedge segments and including a connecting portion joining the upper ends of said legs, the connecting portion comprision a disk having a central opening through which the elongate bolt passes, a cone nut threadedly engaged with the elongate bolt between the legs of said bail member and in predetermined spaced relation to the wedge segments the outer surface of said cone nut being tapered inwardly from top to bottom for engagement with the tapered inner wall of the wedge segments to cause expansion of the wedge segments into gripping engagement with the mine roof opening, and means for limiting longitudinal movement of the expansion shell and bail member with respect to the elongate bolt whereby, upon rotation of the elongated bolt and rebar, the cone nut is moved longitudinally of the bolt into expanding engagement with the wedge segments, the number of revolutions of the elongate bolt required to move the cone nut to cause expansion of the shell corresponding to the number of revolutions of the rebar required to effect proper mixing of the resin and catalyst.
557638
Carr Frederick
White Claude C.
Birmingham Bolt Company
Smart & Biggar
Walter (jim) Resources Inc.
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