Demolition shear and demolition shear piercing tip insert and nose configuration
AssigneeGenesis Attachments, LLC
InventorsDaniel P. Jacobson, Chad Wood, Daniel J. Raihala, Steven T. Letko
Life of this patent
Estimating the term…
Abstract
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. The piercing tip insert includes first and second piercing tip halves, each half having an outer planar sidewall, a curved front wall extending laterally inward, and a bottom leg extending laterally inward defining a shearing edge and a piercing edge.
Claims28
A piercing tip for a nose of an upper jaw of a demolition shear, the nose having a blade-side, a guide-side, a bottom side and a front side, the piercing tip comprising:
- a blade-side outer planar sidewall surface;
- a guide-side outer planar sidewall surface;
- a bottom surface intersecting with and extending laterally between said blade-side outer planar sidewall surface and said guide-side outer planar sidewall surface;
- an outer front wall surface intersecting with and extending laterally between said blade-side outer planar sidewall surface and said guide-side outer planar sidewall surface, and said outer front wall surface intersecting with said bottom surface;
- whereby when mounted onto the nose of the upper jaw, the nose is completely surrounded and protected along the blade-side of the nose by said blade-side outer planar sidewall surface, along the guide-side of the nose by said guide-side outer planar sidewall surface, along the bottom side of the nose by said bottom surface, and along the front side of the nose by said outer front wall surface.
A demolition shear, comprising:
- an upper jaw and a lower jaw, said upper jaw pivotable over a range of motion between an open position and a closed position with respect to said lower jaw, said upper jaw having a forward most tip portion defining a nose, the nose having a blade-side, a guide-side, a bottom side and a front side;
- a piercing tip including:
- a blade-side outer planar sidewall surface;
- a guide-side outer planar sidewall surface;
- a bottom surface intersecting with and extending laterally between said blade-side outer planar sidewall surface and said guide-side outer planar sidewall surface;
- an outer front wall surface intersecting with and extending laterally between said blade-side outer planar sidewall surface and said guide-side outer planar sidewall surface, and said outer front wall surface intersecting with said bottom surface;
- whereby said nose is completely surrounded and protected by said piercing tip along the blade-side of said nose by said blade-side outer planar sidewall surface, along said guide-side of said nose by said guide-side outer planar sidewall surface, along said bottom side of said nose by said bottom surface, and along said front side of said nose by said outer front wall surface.
A blade set for a demolition shear, the demolition shear having an upper jaw and a lower jaw, the upper jaw having a nose, the nose having a blade-side, a guide-side, a bottom side and a front side, the blade set comprising:
- a piercing tip, the piercing tip comprising:
- a blade-side sidewall having a planar outer wear surface and a back end bearing surface;
- a guide-side sidewall having a planar outer wear surface and a back end bearing surface;
- a front wall having a front outer wear surface, the front outer wear surface intersecting with and extending laterally between the planar outer wear surface of the blade-side sidewall and the planar outer wear surface of the guide-side sidewall;
- a bottom wall having a bottom wear surface, the bottom wear surface intersecting with and extending laterally between the planar outer wear surface of the blade-side sidewall and the planar outer wear surface of the guide-side sidewall, and the bottom wear surface intersecting with the front outer wear surface;
- wherein the intersection of the front outer wear surface and bottom wear surface defines a front piercing edge;
- and
- whereby, when the piercing tip is mounted onto the nose of the upper jaw of the demolition shear, the nose is completely surrounded and protected by the piercing tip along the blade-side of the nose by the blade-side sidewall, and along the guide-side of the nose by the guide-side sidewall, along the bottom side of the nose by the bottom wall, and along the front side of the nose by the front wall.
Dependencies are inferred from the claim text.