Patent · US Expired

Cutter-bit assemblies

US4762372A · kind A · utility

20Cited by

5References

8Claims

0Family size

Assignee

Gewerkschaft Eisenhutte Westfalia GmbH · DE

Inventors

Christoph Rassmann · Grafenau, DE
Oswald Breuer · Lichtenau, DE
Bernd Steinkuhl · Grafenau, DE

Key dates

Filing date	Mar 11, 1987
Grant date	Aug 9, 1988
Priority date	—
Expiry date	Mar 11, 2007

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21C27/44
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A cutter-bit assembly employs an arcuate wedge to secure a cutter-bit within a pocket of a holder. The wedge fits into a tapered gap between complementary curved surfaces of the holder and the cutter-bit shank. A projecting insert carried by the shank mates with a serrated portion on the wedge. Contact is established between the wedge and the curved surfaces of the holder and the shank over outer regions separated by non-contacting clearances.

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