Rotatable cutting bit

Details Rotatable cutting bit Rotatable cutting bit

1985-07-18

1988-02-16

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

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

175410, E21C 3518

Patent

active

047250992

ABSTRACT:
A rotatable cutting insert of improved geometry having a shank depending from a head portion and having a hard insert mounted therein, includes an insert having a conically shaped tip section, a base section contiguous with a first intermediate section, a second intermediate section contiguous with both tip and first intermediate section, and where the diameter of the second intermediate section is equal to the maximum diameter of the tip but is smaller than the diameter of the base section.

REFERENCES:
patent: 3796404 (1974-03-01), Hansen et al.
patent: 3807804 (1974-04-01), Kniff
patent: 4163581 (1979-08-01), Krekeler
patent: 4497520 (1985-02-01), Ojanen
patent: 4542943 (1985-09-01), Montgomery, Jr.
patent: 4547020 (1985-10-01), Ojanen

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