Patent · US Active

Superhard composite material bonded to a steel body

US7568770B2 · kind B2 · utility

54Cited by

102References

18Claims

0Family size

Inventors

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

Key dates

Filing date	Mar 15, 2007
Grant date	Aug 4, 2009
Priority date	—
Expiry date	Sep 23, 2027

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21C35/1831
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

In one aspect of the invention, a pick comprises a steel body comprising a formed shank attached to a first end of the body and generally extending along a central axis of the body. An impact tip is secured to a second end of the steel body and comprises a carbide substrate attached to the second end of the steel body which is bonded to a superhard material. A composite material is bonded to an outer surface of the steel body and adapted to protect the steel from wear. The composite material comprises a plurality of superhard particles held within a matrix. The matrix comprises a superhard particle concentration of 40 to 80 percent by volume.

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