Cutting tool having hard tip with lobes

Details Cutting tool having hard tip with lobes Cutting tool having hard tip with lobes

1992-12-17

1994-06-28

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, F21C 3518

Patent

active

053240987

ABSTRACT:
A cutting tool for use in excavating an earth formation comprising an elongate tool body having a hard tip being affixed to the forward end thereof. The hard tip has a plurality of integral, coaxial sections including an integral ribbed section which presents a plurality of longitudinal ribs about the circumference thereof. The tip further includes an integral lobed base section which presents a plurality of radially extending lobes. An integral transition region provides a transition between the ribbed section and the base section.

REFERENCES:
patent: 3356418 (1967-12-01), Healey et al.
patent: 3830546 (1974-08-01), Kniff
patent: 4497520 (1985-02-01), Ojanen
patent: 4725099 (1988-02-01), Penkunas et al.
patent: 4729603 (1988-02-01), Elfgen
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.
patent: 4981328 (1991-01-01), Stiffler et al.
patent: 5054217 (1991-10-01), Nilsson et al.
patent: 5131725 (1990-07-01), Rowlett et al.
patent: 5219209 (1993-06-01), Prizzi et al.
Carbide tip depicted in Multi-Metals Dwg. C-1445-7 (Sep. 5, 1973).
Carbide tip depicted in American Mine Tool Dwg. T-104-76 (Sep. 14, 1982).
Carbide tip depicted in Kennametal Dwg 921-01135 (Aug. 18, 1983).
Carbide tip depicted in American Mine Tool Dwg T-104-13 (Nov. 30, 1982).
Carbide tip depicted in American Mine Tool Dwg. T-104-14 (Aug. 31, 1984).
Carbide tip depicted in Kennametal Dwg. DEV-C-1736 (Jan. 31, 1980).
Carbide tip depicted in Kennametal Dwg. 921-01171 (Dec. 4, 1986).
Carbide tip depicted in Kennametal Dwg. 921-01173 (Mar. 2, 1987).

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