Patents by Inventor Roy Derrick Achilles
Roy Derrick Achilles has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8240405Abstract: 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 polycrystalline diamond abrasive element is characterized by the nonplanar interface having a cruciform configuration, the polycrystalline diamond having a high wear-resistance, and the polycrystalline diamond having a region adjacent the working surface lean in catalysing material and a region rich in catalysing material. The polycrystalline diamond cutters have improved wear resistance, impact strength and cutter life than prior art cutters.Type: GrantFiled: August 4, 2011Date of Patent: August 14, 2012Assignee: Onesteel Trading Pty Ltd.Inventors: Brett Lancaster, Bronwyn Annette Roberts, Imraan Parker, Roy Derrick Achilles
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Patent number: 8206474Abstract: An abrasive compact having at least a tri-modal particle size distribution, and a binder phase, define a plurality of interstices. The binder phase is distributed in the interstices to form binder pools that correspond substantially in average size to that of an ultrahard polycrystalline composite material having a monomodal particle size distribution and substantially the same overall average particle grain size.Type: GrantFiled: July 30, 2007Date of Patent: June 26, 2012Inventors: Klaus Tank, Roy Derrick Achilles
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Patent number: 8172012Abstract: A polycrystalline diamond abrasive cutting element consists generally of a layer of high grade polycrystalline diamond bonded to a cemented carbide substrate. The polycrystalline diamond layer has a working surface and an outer peripheral surface and is characterized by having an annular region or a portion thereof adjacent the peripheral surface that is lean in catalysing material. A region adjacent the working surface is also lean in catalysing material such that in use, as a wear scar develops, both the leading edge and the trailing edge thereof are located in a region lean in catalysing material.Type: GrantFiled: June 3, 2010Date of Patent: May 8, 2012Assignee: Baker Hughes IncorporatedInventor: Roy Derrick Achilles
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Publication number: 20110303467Abstract: 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 crucifonn configuration. The polycrystalline diamond has a high wear-resistance, and has a region adjacent the working surface leanin 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.Type: ApplicationFiled: August 24, 2011Publication date: December 15, 2011Inventors: Brett Lancaster, Bronwyn Annette Roberts, Imraan Parker, Klaus Tank, Roy Derrick Achilles, Clement David Van Der Riet
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Publication number: 20110286810Abstract: 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 polycrystalline diamond abrasive element is characterised by the nonplanar interface having a cruciform configuration, the polycrystalline diamond having a high wear-resistance, and the polycrystalline diamond having a region adjacent the working surface lean in catalysing material and a region rich in catalysing material. The polycrystalline diamond cutters have improved wear resistance, impact strength and cutter life than prior art cutters.Type: ApplicationFiled: August 4, 2011Publication date: November 24, 2011Inventors: Brett Lancaster, Bronwyn Annette Roberts, Imraan Parker, Roy Derrick Achilles
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Patent number: 8020642Abstract: 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.Type: GrantFiled: May 27, 2004Date of Patent: September 20, 2011Inventors: Brett Lancaster, Bronwyn Annette Roberts, Imraan Parker, Klaus Tank, Roy Derrick Achilles, Clement David Van Der Riet
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Patent number: 8016054Abstract: 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 polycrystalline diamond abrasive element is characterised by the nonplanar interface having a cruciform configuration, the polycrystalline diamond having a high wear-resistance, and the polycrystalline diamond having a region adjacent the working surface lean in catalysing material and a region rich in catalysing material. The polycrystalline diamond cutters have improved wear resistance, impact strength and cutter life than prior art cutters.Type: GrantFiled: May 27, 2004Date of Patent: September 13, 2011Inventors: Brett Lancaster, Bronwyn Annette Roberts, Imraan Parker, Roy Derrick Achilles
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Publication number: 20100236837Abstract: A polycrystalline diamond abrasive cutting element consists generally of a layer of high grade polycrystalline diamond bonded to a cemented carbide substrate. The polycrystalline diamond layer has a working surface and an outer peripheral surface and is characterized by having an annular region or a portion thereof adjacent the peripheral surface that is lean in catalysing material. A region adjacent the working surface is also lean in catalysing material such that in use, as a wear scar develops, both the leading edge and the trailing edge thereof are located in a region lean in catalysing material.Type: ApplicationFiled: June 3, 2010Publication date: September 23, 2010Applicant: Baker Hughes IncorporatedInventor: Roy Derrick Achilles
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Patent number: 7730977Abstract: A polycrystalline diamond abrasive cutting element consists generally of a layer of high grade polycrystalline diamond bonded to a cemented carbide substrate. The polycrystalline diamond layer has a working surface and an outer peripheral surface and is characterized by having an annular region or a portion thereof adjacent the peripheral surface that is lean in catalyzing material. A region adjacent the working surface is also lean in catalyzing material such that in use, as a wear scar develops, both the leading edge and the trailing edge thereof are located in a region lean in catalyzing material.Type: GrantFiled: May 11, 2005Date of Patent: June 8, 2010Assignee: Baker Hughes IncorporatedInventor: Roy Derrick Achilles
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Publication number: 20100043302Abstract: An abrasive compact having at least a tri-modal particle size distribution, and a binder phase, define a plurality of interstices. The binder phase is distributed in the interstices to form binder pools that correspond substantially in average size to that of an ultrahard polycrystalline composite material having a monomodal particle size distribution and substantially the same overall average particle grain size.Type: ApplicationFiled: July 30, 2007Publication date: February 25, 2010Inventors: Klaus Tank, Roy Derrick Achilles
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Patent number: 7594553Abstract: A tool insert comprises a substrate (10) having a support surface and a support ring extending laterally from the support surface. The support ring is sized to define a recess (14) within the confines thereof and a shelf about the periphery thereof. A layer (12) of ultra-hard abrasive material is located within the recess and bonded to the substrate and the support ring (16), and presents a primary cutting edge (22) for the tool insert. A protective layer (18) is bonded to the shelf about the support ring so as to protect the primary cutting edge. The protective layer provides a secondary cutting edge (20) for the tool insert, the depth of the protective layer being selected so as to be sufficient to protect the primary cutting edge whilst cutting, milling or drilling through a first substance but to expose the primary cutting edge upon encountering a second substance.Type: GrantFiled: September 12, 2003Date of Patent: September 29, 2009Inventors: Klaus Tank, Raymond Albert Chapman, Roy Derrick Achilles
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Patent number: 7575805Abstract: A polycrystalline diamond abrasive element, particularly a cutting element, comprises a layer of polycrystalline diamond having a working surface and bonded to a substrate, particularly a cemented carbide substrate, along an interface. The polycrystalline diamond abrasive element is characterized by using a binder phase that is homogeneously distributed through the polycrystalline diamond layer and that is of a fine scale. The polycrystalline diamond also has a region adjacent the working surface lean in catalyzing material and a region rich in catalyzing material.Type: GrantFiled: December 9, 2004Date of Patent: August 18, 2009Inventors: Roy Derrick Achilles, Bronwyn Annette Roberts, Imraan Parker, Brett Lancaster, Klaus Tank
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Publication number: 20080222966Abstract: 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 polycrystalline diamond abrasive element is characterised by the nonplanar interface having a cruciform configuration, the polycrystalline diamond having a high wear-resistance, and the polycrystalline diamond having a region adjacent the working surface lean in catalysing material and a region rich in catalysing material. The polycrystalline diamond cutters have improved wear resistance, impact strength and cutter life than prior art cutters.Type: ApplicationFiled: May 27, 2004Publication date: September 18, 2008Applicant: ELEMENT SIX (PTY) LTDInventors: Brett Lancaster, Bronwyn Annette Roberts, Imraan Parker, Roy Derrick Achilles
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Patent number: 7074247Abstract: There is provided a method of making a composite abrasive compact which comprises an abrasive compact bonded to a substrate. The abrasive compact will generally be a diamond compact and the substrate will generally be a cemented carbide substrate. The composite abrasive compact is made under known conditions of elevated temperature and pressure suitable for producing abrasive compacts. The method is characterised by the mass of abrasive particles from which the abrasive compact is made. This mass has three regions which are: (i) an inner region, adjacent the surface of the substrate on which the mass is provided, containing particles having at least four different average particle sizes; (ii) an outer region containing particles having at least three different average particle sizes; and (iii) an intermediate region between the first and second regions.Type: GrantFiled: October 15, 2001Date of Patent: July 11, 2006Inventors: Klaus Tank, Moosa Mahomed Adia, Roy Derrick Achilles, Paul Machael Daniel
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Patent number: 6733378Abstract: An abrasive body which includes an abrasive layer bonded to a substrate along an interface and at least one strip-like projection extending from the interface into the substrate. The projection has a profile which includes a substantially flat central portion and connecting surfaces to either side of the central section. The surface is sloped from the central section to the interface.Type: GrantFiled: February 1, 2001Date of Patent: May 11, 2004Inventors: Klaus Tank, Roy Derrick Achilles
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Publication number: 20040037948Abstract: There is provided a method of making a composite abrasive compact which comprises an abrasive compact bonded to a substrate. The abrasive compact will generally be a diamond compact and the substrate will generally be a cemented carbide substrate. The composite abrasive compact is made under known conditions of elevated temperature and pressure suitable for producing abrasive compacts. The method is characterised by the mass of abrasive particles from which the abrasive compact is made. This mass has three regions which are: (i) an inner region, adjacent the surface of the substrate on which the mass is provided, containing particles having at least four different average particle sizes; (ii) an outer region containing particles having at least three different average particle sizes; and (iii) an intermediate region between the first and second regions.Type: ApplicationFiled: August 25, 2003Publication date: February 26, 2004Inventors: Klaus Tank, Moosa Mahomed Adia, Roy Derrick Achilles, Paul Machael Daniel
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Patent number: 6527633Abstract: An abrasive body which includes an abrasive layer bonded to a substrate along an interface and at least one projection extending from the interface into the substrate. The a projection has an essentially elliptical or circular form in plan and a profile which includes a substantially flat central portion and connecting surfaces joining the central portion to the interface and which slope towards the interface.Type: GrantFiled: February 5, 2001Date of Patent: March 4, 2003Inventors: Klaus Tank, Roy Derrick Achilles
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Patent number: D502952Type: GrantFiled: November 7, 2003Date of Patent: March 15, 2005Inventors: Roy Derrick Achilles, Imraan Parker, Klaus Tank
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Patent number: RE47605Abstract: A polycrystalline diamond abrasive cutting element consists generally of a layer of high grade polycrystalline diamond bonded to a cemented carbide substrate. The polycrystalline diamond layer has a working surface and an outer peripheral surface and is characterized by having an annular region or a portion thereof adjacent the peripheral surface that is lean in catalysing material. A region adjacent the working surface is also lean in catalysing material such that in use, as a wear scar develops, both the leading edge and the trailing edge thereof are located in a region lean in catalysing material.Type: GrantFiled: May 7, 2014Date of Patent: September 17, 2019Assignee: Baker Hughes, A GE Company, LLCInventor: Roy Derrick Achilles