| US 7,469,972 B2 | ||
| Wear resistant tool | ||
| David R. Hall, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US); Ron Crockett, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US); Jeff Jepson, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US); Joe Fox, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US); and Michael Barnhill, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US) | ||
| Filed on Jun. 16, 2006, as Appl. No. 11/424,825. | ||
| Prior Publication US 2007/0290546 A1, Dec. 20, 2007 | ||
| Int. Cl. E21C 35/18 (2006.01); E21C 35/183 (2006.01) | ||
| U.S. Cl. 299—110 [174/433] | 15 Claims |
| 1. A wear-resistant tool, comprising:
first and second cemented metal carbide segments being brazed together at a planar interface;
the first segment being bonded to a diamond material opposite the planar interface and the second segment being bonded opposite
the planar interface to a steel base segment with a shank;
the first segment comprising a first coefficient of thermal expansion at the planar interface and the second segment comprising
a second coefficient of thermal expansion at the planar interface less than the coefficient of thermal expansion of the first
segment; and
the first segment further comprising a cross-sectional thickness at the interface greater than a cross-sectional thickness
of the second segment at the planar interface such that an overhanged is formed between the carbide segments.
|