Patent attributes
A spearhead assembly (10) comprises a base (12) provided with a slot (14) at one end (16) which opens onto an outer surface (13) of the base (12). The outer surface (13) is composed of three contiguous surface portions (18, 20 and 22). A spearpoint (20) is pivotally coupled at its proximal end (26), which is disposed in the slot (14), to the base (12). A distal end (28) of the spearpoint (24) extends or projects beyond the slot (14) and the surface (13) of the base (12). A spearpoint positioning system (30) urges the spearpoint (24) toward one of three annually spaced positioned. These positions are characterised by the spearpoint (24) extending substantially perpendicular to parallel opposed edges of the slot (14) which open onto, or are flanked by, the surface portions (18), (20 and 22). Moving the spearpoint from one position to another requires the application of an external force.
