Rotatable cutting bit insert

Details Rotatable cutting bit insert Rotatable cutting bit insert

1992-06-11

1993-06-15

Bagnell, David J.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Tooth mounted on helical head portion or head with helical...

175427, E21C 3518

Patent

active

052192091

ABSTRACT:
A multi-portion carbide cutting insert which affixes to the forward end of a rotatable cutting bit. The cutting insert has an axially forward tip portion and a flange portion with at least four mediate portions between the tip portion and the flange portion. The first mediate portion has an included angle less than that of the second mediate portion. The second mediate portion has an included angle greater than that of the third mediate portion. The fourth mediate portion has the largest included angle.

REFERENCES:
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patent: 4865392 (1989-09-01), Penkunas et al.
patent: 4911503 (1990-03-01), Stiffler et al.
patent: 4911504 (1990-03-01), Stiffler et al.
patent: 4938538 (1990-07-01), Larsson et al.
Multi-Metals Drawing, C-1445-7 Sep. 1973.
American Mine Tool Drawing T-104-76 Sep. 1982.
American Mine Tool Drawing T-104-13 Nov. 1982.
American Mine Tool Drawing T-104-14 Aug. 1984.
Kennametal Drawing 921-01145 Jan. 1986.
Kennametal Drawing 921-0171 Dec. 1986.
Kennametal Drawing 921-01173 Mar. 1987.

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