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. 04, 2015
Filed:
May. 09, 2012
Cornelis Roelof Jonker, Springs, ZA;
David Christian Bowes, Springs, ZA;
Thembinkosi Shabalala, Springs, ZA;
Nedret Can, Didcot, GB;
Cornelis Roelof Jonker, Springs, ZA;
David Christian Bowes, Springs, ZA;
Thembinkosi Shabalala, Springs, ZA;
Nedret Can, Didcot, GB;
Element Six Abrasives S.A., Luxembourg, LU;
Abstract
A pick tool for degrading asphalt or rock, comprising a PCD element; the PCD element comprising a PCD structure () bonded to a cemented carbide support body () at an interface; the PCD structure comprising a first region () and a second region () adjacent the first region, the second region bonded to the first region by intergrowth of diamond grains; the first region () comprising a plurality of alternating strata (), each stratum having a thickness in the range of about 30 to 300 microns; the second region comprising a plurality of strata (), one or more strata in the second region () having a thickness greater than the thicknesses of the individual strata in the first region (), wherein the alternating strata in the first region () comprise first strata alternating with second strata, the first strata being in a state of residual compressive stress and the second strata being in a state of residual tensile stress.