Patents by Inventor Dennis Griffin
Dennis Griffin 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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Publication number: 20040105806Abstract: A method for forming a superhard polycrystalline diamond or diamond-like element with greatly improved resistance to thermal degradation without loss of impact strength. Collectively called PCD elements, these elements are formed with a binder-catalyzing material in a high-temperature, high-pressure process. The PCD element has a plurality of partially bonded diamond or diamond-like crystals forming at least one continuous diamond matrix, and the interstices among the diamond crystals forming at least one continuous interstitial matrix containing a catalyzing material. The element has a working surface and a body, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material to a depth from the working surface, the remaining interstitial matrix contains the catalyzing material, causing a 950 degrees C. temperature at the working surface to be less than 750 degrees C. at the depth.Type: ApplicationFiled: October 1, 2003Publication date: June 3, 2004Inventors: Nigel Dennis Griffin, Peter Raymond Hughes
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Patent number: 6739214Abstract: The present invention provides a method of making an earth boring drill bit having a superhard polycrystalline diamond or diamond-like element with greatly improved resistance to thermal degradation without loss of impact strength. Collectively called PCD elements, these elements are formed with a binder-catalyzing material in a high-temperature, high-pressure process. The PCD element has a plurality of partially bonded diamond or diamond-like crystals forming at least one continuous diamond matrix, and the interstices among the diamond crystals forming at least one continuous interstitial matrix containing a catalyzing material. The element has a working surface and a body, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and the remaining interstitial matrix contains the catalyzing material.Type: GrantFiled: November 1, 2002Date of Patent: May 25, 2004Assignee: ReedHycalog (UK) LimitedInventors: Nigel Dennis Griffin, Peter Raymond Hughes
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Publication number: 20040007394Abstract: A polycrystalline diamond cutter and method of manufacturing a polycrystalline diamond cutter is disclosed. The method of manufacture comprising assembling a first substrate component, a second notched substrate component and diamond crystals into a desired configuration. The assembly is subjected to high temperature and high pressure conditions to cause the diamond crystals to bond to one another and to the first and second substrate components. The method forms a cutter having a single body of polycrystalline diamond bonded to the substrate components.Type: ApplicationFiled: August 21, 2002Publication date: January 15, 2004Inventor: Nigel Dennis Griffin
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Publication number: 20040007393Abstract: A polycrystalline diamond cutter and method of manufacturing a polycrystalline diamond cutter is disclosed. The method of manufacture comprising assembling a first substrate component, a second substrate component and diamond crystals into a desired configuration. The assembly is subjected to high temperature and high pressure conditions to cause the diamond crystals to bond to one another and to the first and second substrate components. The method forms a cutter having a single body of polycrystalline diamond bonded to the substrate components.Type: ApplicationFiled: July 12, 2002Publication date: January 15, 2004Inventor: Nigel Dennis Griffin
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Publication number: 20030235691Abstract: The present invention provides a superhard polycrystalline diamond or diamond-like element with greatly improved resistance to thermal degradation without loss of impact strength. Collectively called PCD elements, these elements are formed with a binder-catalyzing material in a high-temperature, high-pressure process. The PCD element has a plurality of partially bonded diamond or diamond-like crystals forming at least one continuous diamond matrix, and the interstices among the diamond crystals forming at least one continuous interstitial matrix containing a catalyzing material. The element has a working surface and a body, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and the remaining interstitial matrix contains the catalyzing material.Type: ApplicationFiled: June 20, 2003Publication date: December 25, 2003Inventors: Nigel Dennis Griffin, Peter Raymond Hughes
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Patent number: 6634599Abstract: An airborne store suspension and release arrangement includes two slender “Tee” hangers located one on either side of a vertical plane through the center of the store. Each hanger has a narrow strut portion mounted on the store by one end and an enlarged cross section portion at the other end of the narrow strut portion. The enlarged cross section portion of each hanger is clamped by releasable clamps mounted in a store carrying aircraft. The store and the aircraft are formed with surfaces which abut one another when the store is suspended from the aircraft and the enlarged cross section portions of the hangers are clamped by the clamps. The arrangement of the hangers, the clamps and the abutting surfaces establishes a couple in reaction to a rolling moment to which the store is subjected during maneuvering of the aircraft. Only one such a slender ‘Tee’ hanger is aligned with the geometrical center of the store in an alternative embodiment.Type: GrantFiled: January 4, 2002Date of Patent: October 21, 2003Assignee: Flight Refuelling LimitedInventor: Dennis Griffin
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Publication number: 20030183426Abstract: The present invention provides a superhard polycrystalline diamond or diamond-like element with improved wear resistance. Collectively called PCD elements for the purposes of this specification, these elements are formed with a binder-catalyzing material in a high-temperature, high-pressure (HTHP) process. The diamond material is formed and integrally bonded to a substrate containing the catalyzing material during the HTHP process. The diamond body so formed has a working surface, a plurality of crystals being exposed at the working surface, and wherein the exposed crystals are substantially free of microfractures. The exposed parts of the exposed crystals are of rounded or domed form.Type: ApplicationFiled: March 21, 2003Publication date: October 2, 2003Inventors: Nigel Dennis Griffin, Peter Raymond Hughes
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Patent number: 6601662Abstract: Disclosed is a polycrystalline diamond or diamond-like element with greatly improved wear resistance without loss of impact strength. These elements are formed with a binder-catalyzing material in a high-temperature, high-pressure (HTHP) process. The PCD element has a body with a plurality of bonded diamond or diamond-like crystals forming a continuous diamond matrix that has a diamond volume density greater than 85%. Interstices among the diamond crystals form a continuous interstitial matrix containing a catalyzing material. The diamond matrix table is formed and integrally bonded with a metallic substrate containing the catalyzing material during the HTHP process. The diamond matrix body has a working surface, where a first portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and a second portion of the interstitial matrix in the body adjacent to the working surface contains the catalyzing material.Type: GrantFiled: September 6, 2001Date of Patent: August 5, 2003Assignee: Grant Prideco, L.P.Inventors: Terry R. Matthias, Nigel Dennis Griffin, Peter Raymond Hughes
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Patent number: 6592985Abstract: The present invention provides a superhard polycrystalline diamond or diamond-like element with greatly improved resistance to thermal degradation without loss of impact strength. Collectively called PCD elements, these elements are formed with a binder-catalyzing material in a high-temperature, high-pressure process. The PCD element has a plurality of partially bonded diamond or diamond-like crystals forming at least one continuous diamond matrix, and the interstices among the diamond crystals forming at least one continuous interstitial matrix containing a catalyzing material. The element has a working surface and a body, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and the remaining interstitial matrix contains the catalyzing material.Type: GrantFiled: July 13, 2001Date of Patent: July 15, 2003Assignee: Camco International (UK) LimitedInventors: Nigel Dennis Griffin, Peter Raymond Hughes
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Patent number: 6589640Abstract: The present invention provides a superhard polycrystalline diamond or diamond-like element with greatly improved resistance to thermal degradation without loss of impact strength. Collectively called PCD elements, these elements are formed with a binder-catalyzing material in a high-temperature, high-pressure process. The PCD element has a plurality of partially bonded diamond or diamond-like crystals forming at least one continuous diamond matrix, and the interstices among the diamond crystals forming at least one continuous interstitial matrix containing a catalyzing material. The element has a working surface and a body, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and the remaining interstitial matrix contains the catalyzing material.Type: GrantFiled: November 1, 2002Date of Patent: July 8, 2003Inventors: Nigel Dennis Griffin, Peter Raymond Hughes
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Patent number: 6585064Abstract: The present invention provides an earth boring drill bit with a superhard polycrystalline diamond or diamond-like element with greatly improved resistance to thermal degradation without loss of impact strength. Collectively called PCD elements, these elements are formed with a binder-catalyzing material in a high-temperature, high-pressure process. The PCD element has a plurality of partially bonded diamond or diamond-like crystals forming at least one continuous diamond matrix, and the interstices among the diamond crystals forming at least one continuous interstitial matrix containing a catalyzing material. The element has a working surface and a body, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and the remaining interstitial matrix contains the catalyzing material. This translates to higher wear resistance in cutting applications and has advantages in numerous other applications.Type: GrantFiled: November 4, 2002Date of Patent: July 1, 2003Inventors: Nigel Dennis Griffin, Peter Raymond Hughes
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Patent number: 6562462Abstract: Disclosed is a polycrystalline diamond or diamond-like element with greatly improved wear resistance without loss of impact strength. These elements are formed with a binder-catalyzing material in a high-temperature, high-pressure (HTHP) process. The PCD element has a body with a plurality of bonded diamond or diamond-like crystals forming a continuous diamond matrix that has a diamond volume density greater than 85%. Interstices among the diamond crystals form a continuous interstitial matrix containing a catalyzing material. The diamond matrix table is formed and integrally bonded with a metallic substrate containing the catalyzing material during the HTHP process. The diamond matrix body has a working surface, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and the remaining interstitial matrix contains the catalyzing material.Type: GrantFiled: December 20, 2001Date of Patent: May 13, 2003Assignee: Camco International (UK) LimitedInventors: Nigel Dennis Griffin, Peter Raymond Hughes
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Patent number: 6544308Abstract: Disclosed is a polycrystalline diamond or diamond-like element with greatly improved wear resistance without loss of impact strength. These elements are formed with a binder-catalyzing material in a high-temperature, high-pressure (HTHP) process. The PCD element has a body with a plurality of bonded diamond or diamond-like crystals forming a continuous diamond matrix that has a diamond volume density greater than 85%. Interstices among the diamond crystals form a continuous interstitial matrix containing a catalyzing material. The diamond matrix table is formed and integrally bonded with a metallic substrate containing the catalyzing material during the HTHP process. The diamond matrix body has a working surface, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and the remaining interstitial matrix contains the catalyzing material.Type: GrantFiled: August 30, 2001Date of Patent: April 8, 2003Assignee: Camco International (UK) LimitedInventors: Nigel Dennis Griffin, Peter Raymond Hughes
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Publication number: 20030037640Abstract: The present invention provides a method of making an earth boring drill bit having a superhard polycrystalline diamond or diamond-like element with greatly improved resistance to thermal degradation without loss of impact strength. Collectively called PCD elements, these elements are formed with a binder-catalyzing material in a high-temperature, high-pressure process. The PCD element has a plurality of partially bonded diamond or diamond-like crystals forming at least one continuous diamond matrix, and the interstices among the diamond crystals forming at least one continuous interstitial matrix containing a catalyzing material. The element has a working surface and a body, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and the remaining interstitial matrix contains the catalyzing material.Type: ApplicationFiled: November 1, 2002Publication date: February 27, 2003Inventors: Nigel Dennis Griffin, Peter Raymond Hughes
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Publication number: 20030035958Abstract: The present invention provides an earth boring drill bit with a superhard polycrystalline diamond or diamond-like element with greatly improved resistance to thermal degradation without loss of impact strength. Collectively called PCD elements, these elements are formed with a binder-catalyzing material in a high-temperature, high-pressure process. The PCD element has a plurality of partially bonded diamond or diamond-like crystals forming at least one continuous diamond matrix, and the interstices among the diamond crystals forming at least one continuous interstitial matrix containing a catalyzing material. The element has a working surface and a body, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and the remaining interstitial matrix contains the catalyzing material. This translates to higher wear resistance in cutting applications and has advantages in numerous other applications.Type: ApplicationFiled: November 4, 2002Publication date: February 20, 2003Inventors: Nigel Dennis Griffin, Peter Raymond Hughes
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Publication number: 20030034182Abstract: The present invention provides a superhard polycrystalline diamond or diamond-like element with greatly improved resistance to thermal degradation without loss of impact strength. Collectively called PCD elements, these elements are formed with a binder-catalyzing material in a high-temperature, high-pressure process. The PCD element has a plurality of partially bonded diamond or diamond-like crystals forming at least one continuous diamond matrix, and the interstices among the diamond crystals forming at least one continuous interstitial matrix containing a catalyzing material. The element has a working surface and a body, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and the remaining interstitial matrix contains the catalyzing material.Type: ApplicationFiled: November 1, 2002Publication date: February 20, 2003Inventors: Nigel Dennis Griffin, Peter Raymond Hughes
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Publication number: 20030035957Abstract: The present invention provides a superhard polycrystalline diamond or diamond-like element with greatly improved resistance to thermal degradation without loss of impact strength. Collectively called PCD elements, these elements are formed with a binder-catalyzing material in a high-temperature, high-pressure process. The PCD element has a plurality of partially bonded diamond or diamond-like crystals forming at least one continuous diamond matrix, and the interstices among the diamond crystals forming at least one continuous interstitial matrix containing a catalyzing material. The element has a working surface and a body, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and the remaining interstitial matrix contains the catalyzing material.Type: ApplicationFiled: November 1, 2002Publication date: February 20, 2003Inventors: Nigel Dennis Griffin, Peter Raymond Hughes
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Patent number: 6517902Abstract: A method of thermally treating a preform element, of the kind having a facing table of polycrystalline diamond bonded to a substrate of cemented tungsten carbide, comprises the steps of: (a) heating the element to a soaking temperature of 550-625° C., and preferably about 600° C., (b) maintaining the element at that temperature for at least one hour, and (c) cooling the element to ambient temperature. The resulting preform element has a substrate with a cobalt binder including a substrate interface zone with at least 30 percent by volume of the cobalt binder a hexagonal close packed crystal structure. This reduces the risk of cracking or delamination of the element in use.Type: GrantFiled: April 6, 2001Date of Patent: February 11, 2003Assignee: Camco International (UK) LimitedInventors: Eric F. Drake, Harold A. Sreshta, Nigel Dennis Griffin
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Publication number: 20030021995Abstract: Griffin, Nigel, et al78.1081-1.3-29 Disclosed is a method for manufacturing a polycrystalline diamond or diamond-like element with greatly improved wear resistance without loss of impact strength. These elements are formed with a binder-catalyzing material in a high-temperature, high-pressure (HTHP) process. The PCD element has a body with a plurality of bonded diamond or diamond-like crystals forming a continuous diamond matrix that has a diamond volume density greater than 85%. Interstices among the diamond crystals form a continuous interstitial matrix containing a catalyzing material. The diamond matrix table is formed and integrally bonded with a metallic substrate containing the catalyzing material during the HTHP process. The diamond matrix body has a working surface, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and the remaining interstitial matrix contains the catalyzing material.Type: ApplicationFiled: October 9, 2002Publication date: January 30, 2003Inventors: Nigel Dennis Griffin, Peter Raymond Hughes
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Publication number: 20020193828Abstract: Endovascular filter (10) including a plurality of struts (14) with distal ends (18) adapted to anchor the filter to the vessel wall after deployment, such as by having barbs (20), the filter being adapted to be retrieved if desired. Strut distal ends (18) are coated with an antiproliferative agent (40) that inhibits the ingrowth of tissue around the filter, thereby permitting the filter to be retrieved and removed atraumatically after a prolonged period of time, thus extending the useful life of the retrievable filter. Optionally, the proximal end (22) of the filter may also be so coated, or the entire filter.Type: ApplicationFiled: June 14, 2002Publication date: December 19, 2002Applicant: COOK INCORPORATEDInventors: Dennis Griffin, Arne Molgaard-Nielsen, Anthony O. Ragheb, Raymond B. Leonard