F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 43/00 (2006.01)
Patent
CA 2075877
ABSTRACT A generally square face plate (1) for use with a 16 mm threaded rockbolt (2) includes a centrally located generally hemispherical raised portion (3), top surface (4) and a curved engagement surface (5) for abutting an excavated surface into which a rockbolt is to be installed. An aperture (6) is centrally disposed in portion (3) for receiving the threaded end of rockbolt (2) for allowing tensioning of the rockbolt. A circumferential corrugation (10) is adjacent to and surrounds portion (3). Four radially corrugations (11, 12, 13, 14) extend from portions (3), through corrugation (10), two respective corners (15, 16, 17, 18) of plate (1). The corrugations co-operate to allow plate (1) to be effective when used on uneven surfaces, as the plate will progressively deform to accommodate the surface contour and increase the area of contact between plate (1) and the excavated surface. During any subsequent movement of rock restrained by rockbolt (2), face plate (1) will continue to compensate for changes in rockbolt tension.
Mccarthy Tetrault Llp
Mount Isa Mines Limited
Stewart Ian
LandOfFree
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