Patent · US Expired

Drum mining head with cutter pattern

US3958832A · kind A · utility

17Cited by

7References

4Claims

0Family size

Assignee

Vereinigte Osterreichische Eisen- und Stahlwerke - Alpine Montan Aktiengesellschaft · AT

Inventors

Siegfried Sigott · Ferlach, AT
Hubert Schwelberger · Zeltweg, AT

Key dates

Filing date	Mar 12, 1975
Grant date	May 25, 1976
Priority date	—
Expiry date	Mar 12, 1995

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21D9/104
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A tool body defines an axis of rotation for the tool and has a periphery surrounding said axis. A plurality of cutter bits are carried by said body and protrude substantially radially from said periphery and have free ends. Said cutter bits are arranged in a plurality of groups which are spaced in the direction of said axis. The free ends of the cutter bits of each of said groups define a circle. The circles defined by the free ends of the cutter bits of said groups increase in diameter in one direction along said axis.

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