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US 7,396,086 B1Granted
Press-fit pick
OwnerDavid R. Hall, Ronald Crockett +1inventors
InventorsDavid R. Hall, Ronald Crockett, Jeff Jepson
Life of this patent
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Abstract
In one aspect of the invention, a pick comprises a shank attached to a base of a steel body, a cemented metal carbide core press fit into the steel body opposite the shank, and an impact tip bonded to a first end of the core opposite the shank. The impact tip comprises a superhard material opposite the core, and the core comprises a second end and a largest diameter. A distance through the body from the shank to the second end of the core is less than the largest diameter of the core.
Claims19
A pick, comprising:
- a shank attached to a base of a steel body;
- a cemented metal carbide core press fit into the steel body opposite the shank;
- an impact tip bonded to a first end of the core opposite the shank;
- the impact tip comprising a carbide substrate and a diamond material bonded to the substrate at a non-planar interface opposite the shank, the substrate comprising a thickness less than 6 mm;
- the core comprising a second end and a largest diameter;
- and
- wherein a distance through the body from the shank to the second end of the core is less than the largest diameter of the core.
4 more elements
A pick, comprising:
- a shank attached to a base of a steel body;
- a core harder than the steel body being press fit into the steel body opposite the shank;
- an impact tip comprising a carbide substrate and a diamond material bonded to the substrate at a non-planar interface is bonded to a first end of the core opposite the shank;
- and
- a second end of the core is press fit deeper into the steel body than a width of the core,
- wherein the substrate comprising a thickness less than 6 mm.
3 more elements
A pick, comprising:
- a shank attached to a base of a steel body;
- a cemented metal carbide core press fit into the steel body opposite the shank;
- an impact tip bonded to a first end of the core opposite the shank;
- and
- the impact tip comprising a carbide substrate and a diamond material bonded to the substrate at a non-planar interference opposite the shank,
- wherein the substrate comprising a thickness less than 6 mm and the diamond material comprising a thickness greater than 100 inches.
3 more elements
Dependencies are inferred from the claim text.