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
OG exemplary drawing
 
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.