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US 7,401,863 B1Granted
Press-fit pick
OwnerDavid R. Hall, Ronald Crockett +1inventors
InventorsDavid R. Hall, Ronald Crockett, Jeff Jepson
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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 method for providing cost effective picks, comprising:
- providing a pick adapted for attachment to a driving mechanism;
- the pick comprising a shank and a used cemented metal carbide core attached to a worn steel body, the carbide core comprising a tip with a carbide substrate and a diamond material attached to a working surface, the substrate comprising a thickness less than 6 mm;
- removing the used carbide core from the worn steel body;
- and
- attaching the used carbide core into a cavity substantially opposite a shank of a steel body of a pick.
2 more elements
Dependencies are inferred from the claim text.