Top of Blast Hole Retention Device

Abstract

Newness and distinctiveness is claimed in the visual features of the product shown in the representations, including the shape and configuration of the generally circular, disc-like body and the arrangement of raised, recessed and apertured features across the body.In particular, the design is new and distinctive in the combination of the relatively thin circular profile, the "top hat" with a channel to allow for securing detonator cord or down lines without excessive bending, and the apertures that enable protection of detonator cord or down lines without excessive tension. The design is further characterised by the raised cross-shaped rib arrangement extending across the face of the disc, with the ribs dividing the surface into four generally triangular recessed regions. The relative width, height, termination and symmetrical positioning of the ribs form part of the overall visual appearance of the design.The overall impression created by the combination and spatial relationship

Images