US 7,320,505 B1 | ||
Attack tool | ||
David R. Hall, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US); Ronald Crockett, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US); and Jeff Jepson, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US) | ||
Filed on Aug. 11, 2006, as Appl. No. 11/463,990. | ||
Application 11/463990 is a continuation in part of application No. 11/463975, filed on Aug. 11, 2006. | ||
Application 11/463975 is a continuation in part of application No. 11/463962, filed on Aug. 11, 2006. | ||
Int. Cl. E21C 37/00 (2006.01) |
U.S. Cl. 299—105 [299/111] | 20 Claims |
1. An attack tool, comprising:
a wear-resistant base suitable for attachment to a driving mechanism;
the wear-resistant base comprising a shank and a metal segment;
a portion of the shank being for insertion into a bore of a holder attached to the driving mechanism;
a cemented metal carbide segment bonded to the metal segment; and
the portion of the shank being for insertion into the bore of the holder further comprising a wear-resistant surface having
a hardness greater than 60 HRc.
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