Rotatable cutting bit and bit washer therefor

Details Rotatable cutting bit and bit washer therefor Rotatable cutting bit and bit washer therefor

1998-10-08

2000-09-05

Lillis, Eileen D.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Wear shield or replaceable wear sleeve

299106, 299107, E21C 35197, E21C 3518

Patent

active

061131954

ABSTRACT:
A cutter tool comprises a tool holder, a cutting bit mounted in a bore of the tool holder, and a washer disposed between the tool holder and the cutting bit. The washer is a conical (Belleville) washer which makes annular line contact with a shoulder of the cutting bit, and with an edge of the bore of the tool holder, in order to effectively seal-out fines from the bore.

REFERENCES:
patent: 3746396 (1973-07-01), Radd
patent: 4660890 (1987-04-01), Mills
patent: 4818027 (1989-04-01), Simon
patent: 4932723 (1990-06-01), Mills
patent: 5415462 (1995-05-01), Massa
patent: 5931542 (1999-08-01), Britzke et al.

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