Patent · US Active

Manually rotatable tool

US8534767B2 · kind B2 · utility

6Cited by

102References

15Claims

0Family size

Inventors

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

Key dates

Filing date	Jul 13, 2011
Grant date	Sep 17, 2013
Priority date	—
Expiry date	Jan 9, 2032

Classification

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

Abstract

In one aspect of the present invention, a tool assembly comprises a rotary portion and a stationary portion. The rotary portion comprises a bolster bonded to a diamond symmetric, substantially conically shaped tip. The stationary portion comprises a block mounted to a driving mechanism. A compressible element is disposed intermediate and in mechanical contact with both the rotary and stationary portions. The compressible element is compressed sufficiently to restrict free rotation during a degradation operation.

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