Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Wear resistant feature for tool body
Reexamination Certificate
2007-03-15
2009-08-04
Kreck, John (Department: 3672)
Mining or in situ disintegration of hard material
Cutter tooth or tooth head
Wear resistant feature for tool body
C299S104000, C299S113000
Reexamination Certificate
active
07568770
ABSTRACT:
In one aspect of the invention, a pick comprises a steel body comprising a formed shank attached to a first end of the body and generally extending along a central axis of the body. An impact tip is secured to a second end of the steel body and comprises a carbide substrate attached to the second end of the steel body which is bonded to a superhard material. A composite material is bonded to an outer surface of the steel body and adapted to protect the steel from wear. The composite material comprises a plurality of superhard particles held within a matrix. The matrix comprises a superhard particle concentration of 40 to 80 percent by volume.
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Crockett Ronald
Fox Joe
Hall David R.
Jepson Jeff
Kreck John
Mills Jad A.
Wilde Tyson J.
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