Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Rolling or rotatable bit
Reexamination Certificate
2005-10-26
2008-08-19
Singh, Sunil (Department: 3672)
Mining or in situ disintegration of hard material
Cutter tooth or tooth head
Rolling or rotatable bit
Reexamination Certificate
active
07413257
ABSTRACT:
A rotatable cutting tool includes a cutting tool body that has an axial forward end and an axial rearward end. The cutting tool body further has an axial length. There is a hard tip, which has a distal end, affixed to the cutting tool body at the axial forward end thereof. The cutting tool body has a clearance portion axial rearward of the distal end of the hard tip wherein the clearance portion has a transverse dimension. The clearance portion includes an axial forward transverse dimension and a minimum transverse dimension that is axial rearward of the axial forward transverse dimension. The axial forward dimension is greater than the minimum transverse dimension. The clearance portion has an axial length equal to between about ten percent and about thirty-five percent of the axial length of the cutting tool body.
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Internet Advertisement Printout Wirtgen Products (1 page) no date.
“Appendix C” Overhead Slide made for technical lecture to Virginia Tech Students, used each Fall from 1992-2003.
Kennametal Inc.
Singh Sunil
Smith Matthew W.
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