Patent · US Active

Attack tool

US7464993B2 · kind B2 · utility

57Cited by

119References

18Claims

0Family size

Inventors

David R. Hall · Provo, US
Ronald B. Crockett · Payson, US
Jeff Jepson · Spanish Fork, US

Key dates

Filing date	Aug 11, 2006
Grant date	Dec 16, 2008
Priority date	—
Expiry date	Aug 11, 2026

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21C35/1837
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

In one aspect of the invention, an attack tool has a wear-resistant base suitable for attachment to a driving mechanism. A first end of a generally frustoconical first cemented metal carbide segment bonded to the base. A second metal carbide segment is bonded to a second end of the first carbide segment at an interface opposite the base. The first end has a cross sectional thickness of about 0.250 to 0.750 inches and the second end has a cross sectional thickness of about 1 to 1.50 inches. The first cemented metal carbide segment also has a volume of 0.250 cubic inches to 0.600 cubic inches.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.