Rotatable tool having a carbide insert with bumps

Mining or in situ disintegration of hard material – Cutter tooth or tooth head

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Details

175410, 175411, 299 86, E21B 1046, E21C 3518

Patent

active

049813285

ABSTRACT:
A rotatable cutting tool having a tool body with a socket contained in the forward end thereof wherein a hard insert is affixed to the tool body within the socket. The hard insert comprises an integral tip portion and an integral cylindrical flange portion joined to the tip portion by integral mediate portion. An integral boss projects from the bottom surface of the flange portion wherein the boss is of a generally frusto-conical shape which corresponds to the generally frusto-conical volume defined by the socket. A plurality of bumps projects from the bottom surface of the flange portion and the frusto-conical surface of the boss to provide for a braze joint of uniform thickness between the hard insert and the tool body.

REFERENCES:
patent: 3957307 (1976-05-01), Varda
patent: 4201421 (1980-05-01), Den Besten et al.
patent: 4216832 (1980-08-01), Stephenson et al.
patent: 4497520 (1985-02-01), Ojanen
patent: 4627665 (1986-12-01), Ewing et al.
patent: 4725099 (1988-02-01), Penkunas et al.
patent: 4940288 (1990-07-01), Stiffler et al.
Drawing No. 5172-PD., 4-1979.
Drawing No. SK-41279-2, 1-1981.

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