Bearer plate
AssigneeTru-Di Tool Manufacturing Co., Pty. Ltd.
InventorJohn G. Lesslie
Life of this patent
Estimating the term…
Abstract
A bearer plate for use with rock bolts or friction rock stabilisers has a plate with an earth engaging surface and an aperture. A wall circumscribes the aperture and extends generally away from the plane of the plate. The wall includes a plurality of spaced apart rib formations that extend in a generally radial direction from the aperture. The direction of indentation of the ribs into the wall is opposite to the expected direction of deformation of the wall when subjected to a compressive load applied in the axial direction of the aperture.
Claims26
A bearer plate for use with a rock bolt or the like, said bearer plate comprising:
- a plate formed of rigid sheet material, said plate having a first outer peripheral substantially uni-planar earth engaging portion, and a second inner substantially centrally located portion including an aperture therein having an axis extending substantially transverse to the planar extent of the first portion;
- said second portion including a wall that circumscribes said aperture and extends generally outwardly away from the plane of the first portion,
- said wall including a plurality of spaced apart rib formations indented towards an axis of the aperture that each extend in a generally radial direction from the aperture.
A bearer plate for supporting a rock formation comprising:
- a plate formed of rigid sheet material and having a substantially planar earth engaging portion with a first side for contacting a rock formation and a second side facing in an opposite direction from the first side, and a substantially frustoconical wall extending outwardly from the second side of the earth engaging portion and surrounding an aperture for receiving a rock bolt for engagement with a rock formation contacted by the first side, the aperture having an axis extending substantially perpendicular to a plane of the earth engaging portion, the wall having an outer edge remote from the earth engaging portion forming a bearing surface for a head of a rock bolt, the wall including a plurality of spaced apart rib formations each indented towards the axis of the aperture and extending in a generally radial direction with respect to the axis of the aperture.
Dependencies are inferred from the claim text.