Metal cutting shear and piercing tip therefor

A heavy duty shear adapted to be attached to a backhoe, said shear comprising:

• a fixed blade member;
• at least one blade insert attached to said fixed blade member, said blade insert having at least one cutting edge thereon;
• a movable blade pivotally attached to said fixed blade member at a pivotable attachment;
• at least one blade insert attached to said movable blade, said blade insert having at least one cutting edge thereon, wherein said cutting edge of said blade insert on said movable blade cooperate with said cutting edge of said blade insert of said fixed blade member to provide a shearing action;
• and
• a piercing tip attached to said movable blade at a position spaced from said pivotable attachment with said blade insert of said movable blade therebetween, wherein said piercing tip is welded to said movable blade by a weld, and said piercing tip includes a top surface having a substantially top planar portion and a curved peripheral portion extending from said top planar portion to a front face, a rear surface and side surfaces of said piercing tip, wherein said curved peripheral portion forms an offset between said top planar portion and said front face, said rear surface and said side surfaces to receive said weld.

A heavy-duty shear adapted to be attached to a backhoe, said shear comprising:

• a fixed blade member;
• at least one blade insert attached to said fixed blade member, said at least one blade insert having at least one cutting edge thereon;
• a movable blade pivotally attached to said fixed blade member at a pivotable attachment;
• at least one blade insert attached to said movable blade, said at least one blade insert having at least one cutting edge thereon, wherein said cutting edge of said blade insert on said movable blade cooperate with said cutting edge of said blade insert of said fixed blade member to provide a shearing action;
• and
• a piercing tip attached to said movable blade at a position spaced from said pivotable attachment with said blade insert of said movable blade therebetween, wherein said piercing tip extends to said blade insert of said movable blade, wherein said piercing tip includes a top mounting surface and a post member attached to said top mounting surface positioned along a longitudinal center plane of said piercing tip.

A removable piercing tip for a heavy duty shear comprising:

• a front end having a projection on one side thereof positioned on a centerline of said front end, said front end including a substantially planar front face;
• a front cutting edge extending across a lower side of said front face;
• a bottom surface adjacent said front end;
• a pair of side surfaces spaced from each other, each said side surface adjacent said bottom surface and extending from said front face;
• a top surface spaced from said bottom surface, wherein said front face tapers rearwardly from said front cutting edge to said top surface;
• and
• a mounting member attached to said top surface, wherein said mounting member includes a post member positioned along a longitudinal center plane of said piercing tip.

A piercing tip comprising:

• a front end having a projection on one side thereof positioned on a centerline of said front end, said front end including a substantially planar front face;
• a front cutting edge extending across a lower side of said front face;
• a bottom surface adjacent said front end;
• a pair of side surfaces spaced from each other, each said side surface adjacent said bottom surface and extending from said front face;
• and
• a top surface spaced from said bottom surface, and further including a rear surface adjacent said bottom surface and spaced from said front end, wherein said rear surface includes a cutout adjacent said top surface and one of said side surfaces.

A removable piercing tip for a heavy-duty shear, said tip including:

• a mounting top surface;
• a mounting member extending away from said top surface in a first direction for removably mounting said tip to the shear;
• a bottom surface spaced from said mounting surface;
• and
• a front end extending between said bottom surface and said mounting surface wherein said intersection of said bottom surface and said front end forms a raised center portion on said bottom surface which decreases in height in a direction extending away from said intersection of said bottom surface and said front end.