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US 5,141,289 AGranted
Cemented carbide tip
AssigneeKennametal Inc.
InventorStephen P. Stiffler
Life of this patent
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Abstract
A cemented carbide tip for a cutter bit is provided. The tip is rotationally symmetric about its longitudinal axis and has a socket in its rear end for brazine to a steel protrusion on a steel tool shank. A surface of the socket has bumps thereon to maintain a substantially uniform braze joint thickness.
Claims6
A cemented carbide tip comprising:
- surfaces for engaging an earth formation including an earth engaging concave surface and a cylindrical surface;
- a rearward end for attachment to a ferrous metal body;
- said tip being rotationally symmetric about a longitudinal axis extending from a forward end to said rearward end;
- said rearward end having an annular rearwardly facing first surface and a rearwardly facing second surface located radially inside said first surface and forward of said first surface;
- said first surface separated from said second surface by a radially inwardly facing third surface, and wherein said first surface is planar and joins said third surface to said cylindrical surface;
- a first bump and a second bump circumferentially spaced from said first bump and said first bump and said second bump extending radially inwardly from said third surface.
3 more elements
Dependencies are inferred from the claim text.