Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Endless-chain type head
Patent
1978-06-06
1979-09-11
Purser, Ernest R.
Mining or in situ disintegration of hard material
Cutter tooth or tooth head
Endless-chain type head
175 89, 299 84, 172122, 74243R, 83830, E21C 2510
Patent
active
041672933
ABSTRACT:
The invention concerns a machine for cutting earth formations, of the type comprising a vehicle body, and a power driven rotary cutter mounted on the body. The cutter includes a wheel assembly and a cutter chain mounted in circular fashion around the wheel assembly. The cutter chain comprises a plurality of links connected together by transverse pins, and cutter-receiving sockets carried by the links. The wheel assembly comprises a peripheral surface for supporting the pins, and a plurality of circumferentially spaced recesses in the surface, the quantity and spacing of the recesses corresponding to the quantity and spacing of the transverse pins in the chain such that the pins can be positioned in the recesses. The recesses are of sufficient depth to support the chain in a slackened condition when the pins are positioned in the recesses. The diameter formed by non-recessed portions of the surface is large enough to prevent the pins from traveling completely out of the recesses during earth cutting operations in which the pins travel outwardly up the sides of the recesses to tighten the chain.
REFERENCES:
patent: 590649 (1897-09-01), Ribyn, Jr.
patent: 2398675 (1946-04-01), Sloane
patent: 2865621 (1958-12-01), Proctor
patent: 3436801 (1969-04-01), Berg
patent: 3787091 (1974-01-01), Paolini et al.
patent: 3982688 (1976-09-01), Taylor
Dresser Industries Inc.
Nichols Jr. Nick A.
Purser Ernest R.
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