Mining or in situ disintegration of hard material – Cutter tooth or tooth head
Patent
1989-01-27
1990-07-10
Massie, Jerome W.
Mining or in situ disintegration of hard material
Cutter tooth or tooth head
175411, 299 86, E21C 3518
Patent
active
049402889
ABSTRACT:
A cutter bit for use in construction and/or excavation applications is provided having a hard wear resistant tip joined to a steel shank. The wear resistant tip is rotational symmetric about its longitudinal axis and has a rear end having a socket therein in which is bonded a steel protrusion on the forward end of the steel shank. The tip socket and an outer rearmost facing surface on the tip rear end have respective pluralities of first and second bumps formed thereon and protruding therefrom for spacing, centering and aligning the tip on the bit body to facilitate formation of a braze joint of a desired given cross-sectional thickness profile between the tip and bit body.
REFERENCES:
patent: 177973 (1876-05-01), Trissler
patent: 2614813 (1952-10-01), Shepherd
patent: 2628072 (1953-02-01), Baker
patent: 2707619 (1955-05-01), Andersson
patent: 2784943 (1957-03-01), Bylund
patent: 3519309 (1970-07-01), Engle et al.
patent: 3557416 (1971-01-01), Jones
patent: 4150728 (1979-04-01), Garner et al.
patent: 4176725 (1979-12-01), Shields
patent: 4190127 (1980-02-01), Wolf
patent: 4201421 (1980-05-01), Den Besten et al.
patent: 4216832 (1980-08-01), Stephenson et al.
patent: 4497520 (1985-02-01), Ojanen
patent: 4547020 (1985-10-01), Ojanen
Designing with Kennametal (1957).
Designing with Kennametal (1980).
Kennametal Inc. Drawing Nos. 285-9187 (1969) and 082-8890A (1969).
Handy & Harman Technical Data Sheet No. D-74 (1984).
Beach Wayne H.
Stiffler Stephen P.
Bagnell David J.
Kennametal Inc.
Massie Jerome W.
Prizzi John J.
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