Cutting bit holding apparatus

Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Tooth mounted on helical head portion or head with helical...

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Details

299 91, E21C 3518

Patent

active

051061660

ABSTRACT:
A mining bit holding system is provided which includes a bit holder which attaches to the rotatable drum of a mining machine. The bit holder includes a base portion and a body portion. The body portion has an aperture therethrough to receive a coaxial sleeve. The sleeve has a bore therethrough for rotatably receiving a cutting bit. The sleeve and bit holder are constructed such that the angular position of the sleeve may be fixed relative to the common axis of the aperture in the sleeve in any one of a plurality of discrete positions. Additionally, the sleeve and bit holder are constructed such that the sleeve may be rotated with respect to the axis of the aperture the body portion to another position and then fixed in that position.

REFERENCES:
patent: T103602 (1983-11-01), Rettkowski
patent: 2429728 (1947-10-01), McMurtry
patent: 3397012 (1968-08-01), Krekeler
patent: 3841708 (1974-10-01), Kniff et al.
patent: 3945681 (1976-03-01), White
patent: 4212559 (1980-07-01), Persson
patent: 4302053 (1981-11-01), Roepke et al.
patent: 4462638 (1984-08-01), DenBesten
patent: 4489986 (1984-12-01), Dziak
patent: 4727664 (1988-03-01), Hemphill
patent: 4915454 (1990-04-01), Southern

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