Apparatus for cutting hard earth formations

Details Apparatus for cutting hard earth formations Apparatus for cutting hard earth formations

1978-07-13

1981-01-13

Purser, Ernest R.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Endless-chain type head

299 84, E21C 2538

Patent

active

042446252

ABSTRACT:
The chain link conveyor assembly of an earth cutting machine is provided with means for mounting the conical cutting bits at a penetration angle on the range of 47.degree. to 53.degree. and a sideward angle in the range of 3.degree. to 12.degree.. Even bit wear is best promoted at penetration and sideward angles of 50.degree. and 71/2.degree., respectively.

REFERENCES:
patent: 3787091 (1974-01-01), Paolini et al.
patent: 3841707 (1974-10-01), Kniff et al.
patent: 3954301 (1976-05-01), Stepp
patent: 3968995 (1976-07-01), Arentzen

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