Patents by Inventor John Tunstall
John Tunstall 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: 20190143485Abstract: An abrasive article in form of an abrasive wheel comprising a core and a bonded abrasive body disposed within an interior recess of a peripheral surface of a core. The core comprises a polymer material and has an HDT at 0.45 MPa of at least about 130° C., and a low shrinkage ratio.Type: ApplicationFiled: January 11, 2019Publication date: May 16, 2019Inventors: Boris L. SEREBRENNIKOV, Debdutta ROY, John TUNSTALL, Arup K. KHAUND
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Patent number: 10213903Abstract: An abrasive article in form of an abrasive wheel comprising a core and a bonded abrasive body disposed within an interior recess of a peripheral surface of a core. The core comprises a polymer material and has an HDT at 0.45 MPa of at least about 130° C., and a low shrinkage ratio.Type: GrantFiled: August 4, 2017Date of Patent: February 26, 2019Assignees: SAINT-GOBAIN ABRASIVES, INC., SAINT-GOBAIN ABRASIFSInventors: Boris L. Serebrennikov, Debdutta Roy, John Tunstall, Arup K. Khaund
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Publication number: 20170334040Abstract: An abrasive article in form of an abrasive wheel comprising a core and a bonded abrasive body disposed within an interior recess of a peripheral surface of a core. The core comprises a polymer material and has an HDT at 0.45 MPa of at least about 130° C., and a low shrinkage ratio.Type: ApplicationFiled: August 4, 2017Publication date: November 23, 2017Inventors: Boris L. SEREBRENNIKOV, Debdutta ROY, John TUNSTALL, Arup K. KHAUND
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Patent number: 9764449Abstract: An abrasive article in form of an abrasive wheel comprising a core and a bonded abrasive body disposed within an interior recess of a peripheral surface of a core. The core comprises a polymer material and has an HDT at 0.45 MPa of at least about 130° C., and a low shrinkage ratio.Type: GrantFiled: May 29, 2015Date of Patent: September 19, 2017Assignees: SAINT-GOBAIN ABRASIVES, INC., SAINT-GOBAIN ABRASIFSInventors: Boris L. Serebrennikov, Debdutta Roy, John Tunstall, Arup K. Khaund
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Patent number: 9649747Abstract: A grinding wheel is suited for shaping glass, notably glass that is less than or equal to 4 mm thick. This grinding wheel has at least one abrasive portion formed of at least one metal binder and of diamonds distributed in the binder. The binder has a Rockwell B hardness of between 95 and 105 and is tungsten-based. The diamonds have a size of between 75 and 95 ?m and a concentration of between 2.2 ct/cm3 and 2.64 ct/cm3. Glass, in particular for shaping motor-vehicle glazing units, can be shaped with this grinding wheel, making it possible to achieve travel speeds greater than or equal to 30 m/min.Type: GrantFiled: August 14, 2012Date of Patent: May 16, 2017Assignee: SAINT-GOBAIN GLASS FRANCEInventors: Dominique Bureloux, Thierry Dumenil, Sebastien Wery, Adeline Girod, John Tunstall
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Patent number: 9381618Abstract: A grinding tool includes a shank having an axis, and at least two abrasive portions mounted directly to and in contact with the shank without a hub therebetween. Each of the abrasive portions has a substantially identical profile formed therein.Type: GrantFiled: April 22, 2014Date of Patent: July 5, 2016Assignees: Saint-Gobain Abrasives, Inc., Saint-Gobain AbrasifsInventors: Rajesh Kaul, John Tunstall, Shivshankar Sivasubramanian, Srinivasan Ramanath, Rachana Upadhyay, Arup K Khaund, Yinggang Tian, John Pearlman, Michael D. Cheng, Cecile O. Mejean
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Patent number: 9242345Abstract: An abrasive tool is provided that may include a body, which may include abrasive particles contained within a bond material. The abrasive particles may be a super abrasive material. The body may further include at least one of a ratio of tungsten to cast iron (W/CI) of not greater than about 1, a ratio of copper-containing compositions to cast iron (CCC/CI) of not greater than about 1, a ratio of titanium-containing compositions to cast-iron (TiCC/CI) of not greater than about 1, a ratio of tungsten carbide to cast iron (WC/CI) of not greater than about 1, a ratio of tungsten carbide to copper-containing compositions (WC/CCC) of not greater than about 1, a ratio of copper-containing compositions and titanium-containing compositions to cast iron ((CCC+TiC)/CI) of not greater than about 1.5 or a combination thereof.Type: GrantFiled: June 12, 2014Date of Patent: January 26, 2016Assignees: Saint-Gobain Abrasives, Inc., Saint-Gobain AbrasifsInventors: Debdutta Roy, Srinivasan Ramanath, John Tunstall, Rachana Upadhyay, Arup K. Khaund
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Publication number: 20150343601Abstract: An abrasive article in form of an abrasive wheel comprising a core and a bonded abrasive body disposed within an interior recess of a peripheral surface of a core. The core comprises a polymer material and has an HDT at 0.45 MPa of at least about 130° C., and a low shrinkage ratio.Type: ApplicationFiled: May 29, 2015Publication date: December 3, 2015Inventors: Boris L. SEREBRENNIKOV, Debdutta ROY, John TUNSTALL, Arup K. KHAUND
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Publication number: 20150283673Abstract: A grinding wheel is suited for shaping glass, notably glass that is less than or equal to 4 mm thick. This grinding wheel has at least one abrasive portion formed of at least one metal binder and of diamonds distributed in the binder. The binder has a Rockwell B hardness of between 95 and 105 and is tungsten-based. The diamonds have a size of between 75 and 95 ?m and a concentration of between 2.2 ct/cm3 and 2.64 ct/cm3. Glass, in particular for shaping motor-vehicle glazing units, can be shaped with this grinding wheel, making it possible to achieve travel speeds greater than or equal to 30 m/min.Type: ApplicationFiled: August 14, 2012Publication date: October 8, 2015Applicant: SAINT-GOBAIN GLASS FRANCEInventors: Dominique Bureloux, Thierry Dumenil, Sebastien Wery, Adeline Girod, John Tunstall
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Publication number: 20140366458Abstract: An abrasive tool is provided that may include a body, which may include abrasive particles contained within a bond material. The abrasive particles may be a super abrasive material. The body may further include at least one of a break-in length of not greater than about 1000 linear meters, a maximum initial speed character of at least about 10 m/min, a life span of at least about 1000 linear meters, a dressing frequency of at least about 25 parts/dress, an edge quality of at least about 25% of a workpiece free from defects and a combination thereof.Type: ApplicationFiled: June 12, 2014Publication date: December 18, 2014Inventors: Debdutta ROY, Srinivasan RAMANATH, John TUNSTALL, Rachana UPADHYAY, Arup K. KHAUND
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Publication number: 20140366457Abstract: An abrasive tool is provided that may include a body, which may include abrasive particles contained within a bond material. The abrasive particles may be a super abrasive material. The body may further include at least one of a ratio of tungsten to cast iron (W/CI) of not greater than about 1, a ratio of copper-containing compositions to cast iron (CCC/CI) of not greater than about 1, a ratio of titanium-containing compositions to cast-iron (TiCC/CI) of not greater than about 1, a ratio of tungsten carbide to cast iron (WC/CI) of not greater than about 1, a ratio of tungsten carbide to copper-containing compositions (WC/CCC) of not greater than about 1, a ratio of copper-containing compositions and titanium-containing compositions to cast iron ((CCC+TiC)/CI) of not greater than about 1.5 or a combination thereof.Type: ApplicationFiled: June 12, 2014Publication date: December 18, 2014Inventors: Debdutta ROY, Srinivasan RAMANATH, John TUNSTALL, Rachana UPADHYAY, Arup K. KHAUND
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Publication number: 20140323020Abstract: A grinding tool includes a shank having an axis, and at least two abrasive portions mounted directly to and in contact with the shank without a hub therebetween. Each of the abrasive portions has a substantially identical profile formed therein.Type: ApplicationFiled: April 22, 2014Publication date: October 30, 2014Applicants: SAINT-GOBAIN ABRASIVES, INC., SAINT-GOBAIN ABRASIFSInventors: Rajesh KAUL, John TUNSTALL, Shivshankar SIVASUBRAMANIAN, Srinivasan RAMANATH, Rachana UPADHYAY, Arup K. KHAUND, Yinggang TIAN, John PEARLMAN, Michael D. CHENG, Cecile O. MEJEAN
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Patent number: 6769964Abstract: A grinding tool and method is provided for shaping an edge of sheet glass. The grinding tool includes an arbor and a wheel being of a unitary construction and including an axis of rotation. The grinding tool further includes a recess extending along a periphery of the wheel, with a bonded abrasive being disposed therein. The bonded abrasive is sized and shaped for being profiled, to shape an edge of a glass sheet upon rotation of the tool about the axis. The bonded abrasive may further be sized and shaped for being re-profiled after use. The grinding tool of this invention may provide for both improved quality and reduced cost sheet glass.Type: GrantFiled: August 2, 2002Date of Patent: August 3, 2004Assignee: Saint-Cobain Abrasives Technology CompanyInventor: John Tunstall
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Publication number: 20040023599Abstract: A grinding tool and method is provided for shaping an edge of sheet glass. The grinding tool includes an arbor and a wheel being of a unitary construction and including an axis of rotation. The grinding tool further includes a recess extending along a periphery of the wheel, with a bonded abrasive being disposed therein. The bonded abrasive is sized and shaped for being profiled, to shape an edge of a glass sheet upon rotation of the tool about the axis. The bonded abrasive may further be sized and shaped for being re-profiled after use. The grinding tool of this invention may provide for both improved quality and reduced cost sheet glass.Type: ApplicationFiled: August 2, 2002Publication date: February 5, 2004Inventor: John Tunstall
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Patent number: 6213860Abstract: A grinding wheel for use in grinding glass, has an outer periphery of abrasive material secured to a body portion made of a lightweight material.Type: GrantFiled: September 21, 2000Date of Patent: April 10, 2001Assignee: Unicorn Abrasives LimitedInventors: John Tunstall, George Laskaris