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:
Sep. 20, 2011
Filed:
May. 27, 2004
Brett Lancaster, Boksburg, ZA;
Bronwyn Annette Roberts, Parkhurst, ZA;
Imraan Parker, Cape Town, ZA;
Klaus Tank, Johannesburg, ZA;
Roy Derrick Achilles, Bedfordview, ZA;
Clement David Van Der Riet, Edenglen, ZA;
Brett Lancaster, Boksburg, ZA;
Bronwyn Annette Roberts, Parkhurst, ZA;
Imraan Parker, Cape Town, ZA;
Klaus Tank, Johannesburg, ZA;
Roy Derrick Achilles, Bedfordview, ZA;
Clement David Van Der Riet, Edenglen, ZA;
Other;
Abstract
A polycrystalline diamond abrasive element, particularly a cutting element, comprises a table of polycrystalline diamond bonded to a substrate, particularly a cemented carbide substrate, along a non-planar interface. The non-planar interface typically has a cruciform configuration. The polycrystalline diamond has a high wear-resistance, and has a region adjacent the working surface lean in catalysing material and a region rich in catalysing material. The region lean in catalysing material extends to a depth of 40 to 90 microns, which is much shallower than in the prior art. Notwithstanding the shallow region lean in catalysing material, the polycrystalline diamond cutters have a wear resistance, impact strength and cutter life comparable to that of prior art cutters, but requiring only 20% of the treatment times of the prior art cutters.