The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 24, 1984
Filed:
Jan. 19, 1982
Micheal B Crawford, Duncanville, TX (US);
Dresser Industries, Inc., Dallas, TX (US);
Abstract
A tri-cone rotary rock bit having true rolling conical cutters of different cone angle and with each cutter having a plurality of intermediate annular rows of cutting projections for disintegrating the borehole bottom. Such projections in the intermediate rows being true-rolling about a bottom distinct from the bottom cut by the projections on the remaining intermediate annular rows of the cutting projections of each cone are also at distinct separate distances from the center of rotation of the bit to produce a borehole bottom profile having concentric rows of crests and valleys.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile