Patent · US Active

Hollow pick shank

US7413258B2 · kind B2 · utility

61Cited by

34References

18Claims

0Family size

Inventors

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

Key dates

Filing date	Oct 12, 2007
Grant date	Aug 19, 2008
Priority date	—
Expiry date	Oct 12, 2027

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21C35/188
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

In one aspect of the invention, a degradation pick comprises a bolster disposed intermediate a shank and an impact tip. The shank comprises an outer diameter and first and second ends. The shank is coupled to the bolster through the first end and the second end is adapted for insertion into a central bore of a holder attached to a driving mechanism. The shank comprises a hollow portion disposed within the outer diameter and between the first and second ends. The hollow portion may comprise an opening that is disposed in the second end. In some embodiments the hollow portion may comprise a length that is at least as great as the outer diameter.

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