Drum mining head with cutter pattern

Details Drum mining head with cutter pattern Drum mining head with cutter pattern

1975-03-12

1976-05-25

Purser, Ernest R.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Tooth mounted on helical head portion or head with helical...

175 91, 299 10, E21C 2724

Patent

active

039588327

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.

REFERENCES:
patent: 720841 (1903-02-01), Pawel
patent: 1717597 (1929-06-01), App
patent: 1723381 (1929-08-01), Seifert
patent: 1830267 (1931-11-01), Ferris
patent: 3064958 (1962-11-01), Osgood
patent: 3516712 (1970-06-01), Bennett et al.
patent: 3774969 (1973-11-01), Lebegue

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