Abrading – Rigid tool
Reexamination Certificate
1996-06-28
2001-09-04
Banks, Derris H. (Department: 3723)
Abrading
Rigid tool
C407S118000
Reexamination Certificate
active
06283844
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to tool components.
A composite abrasive compact consists of an abrasive compact bonded to a cemented carbide substrate. The abrasive compact will generally be a diamond or cubic boron nitride compact. Such composite abrasive compacts are used extensively in industry and are described and illustrated in the patent literature.
There is described in the patent literature a tool component comprising an abrasive compact bonded to a cemented carbide substrate along an interface which has a stepped configuration. Examples of such literature are U.S. Pat. Nos. 4,784,023, 4,997,049 and 5,351,773.
SUMMARY OF THE INVENTION
According to the present invention, there is provided a tool component comprising an abrasive compact having a flat working surface presenting a cutting edge and an opposite surface bonded to a cemented carbide substrate along an interface, a recess extending into the cemented carbide substrate from the interface filled with abrasive compact and having a central portion and an outer portion, shallower than the central portion, which defines, in plan, at least one substantially wedge-shaped configuration, the configuration having a narrow end coincident with a side surface of the component, and sides extending into the component and diverging from the narrow end.
In one preferred form of the invention, the outer portion defines, in plan, three substantially wedge-shaped configurations. An example of a shape which will produce such configurations is one in which the outer portion has a substantially triangular shape in plan.
Further according to the invention, a mining pick comprises an elongate body, one end of which is adapted for location in a supporting structure such as a drum, and an opposite working end, the working end having a tool component as described above mounted therein such that a cutting edge is presented to a substrate to be cut, the cutting edge being coincident with the narrow end of a wedge-shaped configuration of the tool component.
REFERENCES:
patent: 4268276 (1981-05-01), Bovenkerk
patent: 4784023 (1988-11-01), Dennis
patent: 4787466 (1988-11-01), Tomlinson et al.
patent: 4997049 (1991-03-01), Tank et al.
patent: 5060739 (1991-10-01), Griffin
patent: 5351773 (1994-10-01), Yanagisawa
patent: 5431239 (1995-07-01), Tibbitts et al.
patent: 5472376 (1995-12-01), Olmstead et al.
patent: 5484330 (1996-01-01), Flood et al.
patent: 0 604 211 A1 (1994-06-01), None
patent: 0 659 510 A1 (1995-06-01), None
Banks Derris H.
Scully Scott Murphy & Presser
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