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:
Aug. 08, 2000
Filed:
Sep. 01, 1998
Terry R Matthias, Upton St. Leonards, GB;
Camco International (UK) Limited, Stonehouse, GB;
Abstract
A preform cutting element, for a rotary drag-type drill bit, includes a facing table of superhard material having a front face, a peripheral surface, and a rear surface bonded to the front surface of a substrate which is less hard than the superhard material. The facing table extends across only a part of the front surface of the substrate, and part of the substrate engages the peripheral surface of the facing table. When such a cutting element is mounted on a bit body with the part of the facing table periphery which is engaged by the substrate being located opposite the cutting edge of the element, the part of the substrate which engages the periphery of the facing table acts as a mechanical support to the facing table so as to resist impact and other loads to which the facing table may be subject in use.