DEMOLITION SHEAR AND DEMOLITION SHEAR PIERCING TIP INSERT AND NOSE CONFIGURATION

摘要

A demolition shear and a piercing tip insert and nose configuration for a demolition shear which resists nose wear and resists retract forces exerted on the piercing tip insert in jamming situations and in the event of snagging of the piercing tip insert. There is a need for a demolition shear having a piercing tip insert and nose configuration to reduce nose wear and to resist retract forces exerted on the piercing tip insert in jamming situations and in the event of snagging of the piercing tip insert.

主权项

1. A piercing tip for a demolition shear, said piercing tip comprising:
first and second piercing tip halves, each half including:
an outer sidewall having a planar outer wear surface, said outer sidewall further having an ear and a back end bearing surface, said ear having an upper ear bearing surface and a lower ear bearing surface wherein at least a portion of said lower ear bearing surface is rearward of said back end bearing surface;a curved front wall having an outer curved wear surface defining a front wall arc length with a front wall arc radius, said curved outer wear surface extending laterally inward and substantially perpendicular to said planar outer wear surface of said sidewall;a bottom leg having a lower wear surface extending laterally inward and substantially perpendicular to said planar outer wear surface of said sidewall;wherein an intersection of said substantially planar outer wear surface and said bottom wear surface defines a shearing edge and wherein an intersection of said outer curved wear surface and said bottom wear surface defines a front piercing edge.