Patent · US Active

Retainer sleeve in a degradation assembly

US7410221B2 · kind B2 · utility

49Cited by

93References

16Claims

0Family size

Inventors

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

Key dates

Filing date	Nov 10, 2006
Grant date	Aug 12, 2008
Priority date	—
Expiry date	Feb 7, 2027

Classification

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

Abstract

A degradation assembly has an attack tool with a body and a shank. The body has a wear resistant tip with a hardness of at least 60 HRc. The shank is disposed within a bore of a holder secured to a driving mechanism. A retainer sleeve is disposed around the shank of the attack tool, wherein an annular gap of 0.002 to 0.010 inches exists between at least a portion of the sleeve and the shank.

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