Patents by Inventor Roger L. Briggs
Roger L. Briggs 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: 9714700Abstract: A pulley for a continuously variable transmission and a method of creating an engineered surface on an outer surface of a pulley of a continuously variable transmission, with the engineered surface engaging with a belt or chain of the continuously variable transmission. The method comprising the steps of: determining an actual engineered roughness (Rpk) on the outer surface needed to obtain a predetermined friction between the engineered surface and the belt or chain; and etching microgrooves in at least a portion of the outer surface to create the engineered surface by employing a laser to etch the microgrooves, the microgrooves being formed to a depth that produces the actual engineered roughness (Rpk).Type: GrantFiled: October 7, 2010Date of Patent: July 25, 2017Assignee: GM Global Technology Operations LLCInventors: Roger L. Briggs, Martin S. Kramer, Ronald P. Buffa, Matthew P. Werner
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Patent number: 8701259Abstract: A method of re-manufacturing a shaft-hub assembly to be used in a transfer case, the method including the steps of: determining an initial diameter of a journal bearing of a main shaft that has been used in the transfer case; comparing the determined initial diameter to a predetermined minimum threshold, and discarding the main shaft if the determined initial diameter is below the predetermined minimum threshold; if the determined initial diameter is above the predetermined minimum threshold, preparing the bearing surface of the journal bearing for a thermal spray process; thermally spraying an aluminum bronze material onto the bearing surface; and machining the aluminum bronze material to achieve an outside diameter that provides a desired running clearance with a corresponding finished inside diameter of a central bore for a hub to which the main shaft will be assembled in the transfer case.Type: GrantFiled: November 30, 2010Date of Patent: April 22, 2014Assignee: GM Global Technology Operations LLCInventors: Martin S. Kramer, Roger L. Briggs, Steven J. Ross
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Patent number: 8499447Abstract: A method is provided for repairing a cylinder head having corrosion and erosion of the gasket sealing surface around the coolant inlet. The engine is disassembled and the corroded material is machined to a selected depth and width creating a pocket having a bottom wall surface and an annular side wall surface surrounding the coolant inlet port. An annular insert is provided having an annular outer side wall, a top wall, a bottom wall, and a central opening. The insert has a thickness greater than the depth of the machined pocket. An adhesive is applied the insert is pressed into the pocket. After curing of the adhesive, the top wall of the insert is machined to a dimension flush with the sealing surface of the head thereby creating a proper sealing surface for the subsequent seating of a replacement gasket.Type: GrantFiled: August 13, 2010Date of Patent: August 6, 2013Assignee: GM Global Technology Operations LLCInventors: Martin S. Kramer, Roger L. Briggs
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Publication number: 20120131799Abstract: A method of re-manufacturing a shaft-hub assembly to be used in a transfer case, the method including the steps of : determining an initial diameter of a journal bearing of a main shaft that has been used in the transfer case; comparing the determined initial diameter to a predetermined minimum threshold, and discarding the main shaft if the determined initial diameter is below the predetermined minimum threshold; if the determined initial diameter is above the predetermined minimum threshold, preparing the bearing surface of the journal bearing for a thermal spray process; thermally spraying an aluminum bronze material onto the bearing surface; and machining the aluminum bronze material to achieve an outside diameter that provides a desired running clearance with a corresponding finished inside diameter of a central bore for a hub to which the main shaft will be assembled in the transfer case.Type: ApplicationFiled: November 30, 2010Publication date: May 31, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Martin S. Kramer, Roger L. Briggs, Steven J. Ross
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Publication number: 20120088615Abstract: A pulley for a continuously variable transmission and a method of creating an engineered surface on an outer surface of a pulley of a continuously variable transmission, with the engineered surface engaging with a belt or chain of the continuously variable transmission. The method comprising the steps of: determining an actual engineered roughness (Rpk) on the outer surface needed to obtain a predetermined friction between the engineered surface and the belt or chain; and etching microgrooves in at least a portion of the outer surface to create the engineered surface by employing a laser to etch the microgrooves, the microgrooves being formed to a depth that produces the actual engineered roughness (Rpk).Type: ApplicationFiled: October 7, 2010Publication date: April 12, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Roger L. Briggs, Martin S. Kramer, Ronald P. Buffa, Matthew P. Werner
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Publication number: 20120036715Abstract: A method is provided for repairing a cylinder head having corrosion and erosion of the gasket sealing surface around the coolant inlet. The engine is disassembled and the corroded material is machined to a selected depth and width creating a pocket having a bottom wall surface and an annular side wall surface surrounding the coolant inlet port. An annular insert is provided having an annular outer side wall, a top wall, a bottom wall, and a central opening. The insert has a thickness greater than the depth of the machined pocket. An adhesive is applied the insert is pressed into the pocket. After curing of the adhesive, the top wall of the insert is machined to a dimension flush with the sealing surface of the head thereby creating a proper sealing surface for the subsequent seating of a replacement gasket.Type: ApplicationFiled: August 13, 2010Publication date: February 16, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Martin S. KRAMER, Roger L. BRIGGS
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Patent number: 7485044Abstract: A shaft assembly comprises an annular hub with a shaft extending therefrom. The hub and the shaft are integrally formed from a single forging, thereby reducing stress concentration locations within the assembly. The hub includes a circumferential wall having a wall thickness. A plurality of teeth protrude from the circumferential wall. Each of the plurality of teeth has a tooth thickness, with the tooth thickness being greater than the wall thickness. Splines are formed on an outer surface of the shaft. Preferably, the splines are induction hardened. A method of manufacturing the shaft assembly includes forging a base member and flow forming the base member into the hub and the shaft to create the shaft assembly. Next, the plurality of teeth are formed within the hub. Finally, the splines are formed on the shaft, and preferably induction hardened.Type: GrantFiled: February 17, 2005Date of Patent: February 3, 2009Assignee: General Motors CorporationInventor: Roger L. Briggs
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Publication number: 20040267030Abstract: The present invention provides a novel process for preparing Form 1 ranitidine hydrochloride by crystallization from at least one C1-C6 alkanol.Type: ApplicationFiled: July 19, 2004Publication date: December 30, 2004Applicant: Aventis Pharmaceuticals Inc.Inventors: Wen J. Cheng, Roger L. Briggs, Lee V. McCoy
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Patent number: 6675453Abstract: A method is provided for remanufacturing a transmission assembly including an output shaft having an input end positioned adjacent an input sun gear. The method includes machining a pocket into the input end of the output shaft. A first roller needle bearing is positioned inside the pocket. The input sun gear is then replaced with a modified sun gear having a protruding center support hub configured to extend into the pocket and cooperate with the first roller needle bearing, thereby supporting the output shaft to prevent tilting of the output shaft to reduce wear.Type: GrantFiled: June 11, 2002Date of Patent: January 13, 2004Assignee: General Motors CorporationInventor: Roger L. Briggs
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Publication number: 20030226257Abstract: A method is provided for remanufacturing a transmission assembly including an output shaft having an input end positioned adjacent an input sun gear. The method includes machining a pocket into the input end of the output shaft. A first roller needle bearing is positioned inside the pocket. The input sun gear is then replaced with a modified sun gear having a protruding center support hub configured to extend into the pocket and cooperate with the first roller needle bearing, thereby supporting the output shaft to prevent tilting of the output shaft to reduce wear.Type: ApplicationFiled: June 11, 2002Publication date: December 11, 2003Inventor: Roger L. Briggs
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Publication number: 20020151729Abstract: The present invention provides a novel process for preparing Form 1 ranitidine hydrochloride by crystallization from at least one C1-C6 alkanol.Type: ApplicationFiled: May 31, 2002Publication date: October 17, 2002Inventors: Wen J. Cheng, Roger L. Briggs, Lee V. McCoy
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Patent number: 4171453Abstract: A dry alkali metal phenate can be more efficiently carbonated with carbon dioxide under pressure to an alkali metal carboxylate of a phenol, if the phenate is finely divided and the temperature during carbonation is maintained below about 135.degree. C. until at least about 25 mole percent of the carbon dioxide theoretically necessary to achieve complete carbonation is absorbed by the phenate. This method of carbonation is particularly useful to produce the sodium salt of salicylic acid.Type: GrantFiled: February 22, 1978Date of Patent: October 16, 1979Assignee: The Dow Chemical CompanyInventors: Eugene R. Moore, David C. McDonald, Joseph Willner, Roger L. Briggs
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Patent number: 4137258Abstract: Alkali metal salicylate can be efficiently acidified and the salicylic acid product formed contemporaneously sublimed by contacting the salicylate as a solid with gaseous hydrogen chloride at the conditions specified. The temperature of the gaseous hydrogen chloride is controlled so that the heat required to sublime the salicylic acid product is predominantly supplied by the heat of reaction of the hydrogen chloride with the alkali metal salt of the carboxylic acid.Type: GrantFiled: April 7, 1978Date of Patent: January 30, 1979Assignee: The Dow Chemical CompanyInventors: Eugene R. Moore, Roger L. Briggs, David C. McDonald, Richard Hoffman