Corner-cutting mining assembly

Details Corner-cutting mining assembly Corner-cutting mining assembly

1981-07-01

1983-08-23

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 59, E21C 2724

Patent

active

044000367

ABSTRACT:
A mining assembly includes a primary rotary cutter mounted on one end of a support shaft and four secondary rotary cutters carried on the same support shaft and positioned behind the primary cutters for cutting corners in the hole cut by the latter.

REFERENCES:
patent: 2561343 (1951-07-01), Crossley
patent: 2733057 (1956-01-01), Letts
patent: 2950902 (1960-08-01), Olds
patent: 3945445 (1976-03-01), Ikeda

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