Patents by Inventor Scott A. Johnstone
Scott A. Johnstone 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: 20240337160Abstract: Roller cone drill bits and methods of increasing the wear resistance of a roller cone drill bit are disclosed. The roller cone drill bit includes a plurality of rolling elements within a bearing assembly of a cone. Each rolling element of the plurality of rolling elements may have a surface hardness of HRC 59-63, a hardened depth that is 0.5 mm to 3.0 mm deep, and may be derived from a low carbon bearing steel material. The hardened depth is measured from the surface of each rolling element and the low carbon bearing steel material has, by weight percent, from 0.12% to 0.25% carbon.Type: ApplicationFiled: July 20, 2022Publication date: October 10, 2024Applicant: Caterpillar Inc.Inventors: Swetha SURESH, Gary C. YERBY, Chetan V. DAHIWAL, Thomas J. YANIAK, Michael A. PERSHING, Todd M. BLINDT, Scott A. JOHNSTON, Timothy F. NUSZ, Akilan APPAVU, Benjamin J. BARGFREDE
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Patent number: 12098466Abstract: A carburized steel component, comprising a steel base including, by weight percent, from 0.08% to 0.35% carbon, 0.5% to 1.3% manganese, 0% to 0.35% silicon, 0.2% to 2.0% chromium, 0% to 4% nickel, 0% to 0.50% molybdenum, 0% to 0.06% niobium, and a remaining weight percent of iron, and a carburized layer of above 0.35% by weight carbon from a surface of the carburized layer to a carburized layer depth, wherein the carburized layer depth is from 0.5 mm to 3.0 mm, wherein the carburized layer comprises a microstructure including martensite, retained austenite, carbide, and less than 2% by volume non-martensitic transformation products (NMTP), and wherein the carburized layer includes a prior austenite average grain size of 3.0-8.0 microns from the surface to a depth of at least 0.2 mm.Type: GrantFiled: March 8, 2023Date of Patent: September 24, 2024Assignee: Caterpillar Inc.Inventors: Michael A. Pershing, Curtis A. Henning, Robert J. Pickerill, Scott A. Johnston
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Publication number: 20230220532Abstract: A carburized steel component, comprising a steel base including, by weight percent, from 0.08% to 0.35% carbon, 0.5% to 1.3% manganese, 0% to 0.35% silicon, 0.2% to 2.0% chromium, 0% to 4% nickel, 0% to 0.50% molybdenum, 0% to 0.06% niobium, and a remaining weight percent of iron, and a carburized layer of above 0.35% by weight carbon from a surface of the carburized layer to a carburized layer depth, wherein the carburized layer depth is from 0.5 mm to 3.0 mm, wherein the carburized layer comprises a microstructure including martensite, retained austenite, carbide, and less than 2% by volume non-martensitic transformation products (NMTP), and wherein the carburized layer includes a prior austenite average grain size of 3.0-8.0 microns from the surface to a depth of at least 0.2 mm.Type: ApplicationFiled: March 8, 2023Publication date: July 13, 2023Applicant: Caterpillar Inc.Inventors: Michael A. PERSHING, Curtis A. HENNING, Robert J. PICKERILL, Scott A. JOHNSTON
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Patent number: 11624106Abstract: A carburized steel component, comprising a steel base including, by weight percent, from 0.08% to 0.35% carbon, 0.5% to 1.3% manganese, 0% to 0.35% silicon, 0.2% to 2.0% chromium, 0% to 4% nickel, 0% to 0.50% molybdenum, 0% to 0.06% niobium, and a remaining weight percent of iron, and a carburized layer of above 0.35% by weight carbon from a surface of the carburized layer to a carburized layer depth, wherein the carburized layer depth is from 0.5 mm to 3.0 mm, wherein the carburized layer comprises a microstructure including martensite, retained austenite, carbide, and less than 2% by volume non-martensitic transformation products (NMTP), and wherein the carburized layer includes a prior austenite average grain size of 3.0-8.0 microns from the surface to a depth of at least 0.2 mm.Type: GrantFiled: March 18, 2020Date of Patent: April 11, 2023Assignee: Caterpillar Inc.Inventors: Michael A. Pershing, Curtis A. Henning, Robert J. Pickerill, Scott A. Johnston
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Publication number: 20210292880Abstract: A carburized steel component, comprising a steel base including, by weight percent, from 0.08% to 0.35% carbon, 0.5% to 1.3% manganese, 0% to 0.35% silicon, 0.2% to 2.0% chromium, 0% to 4% nickel, 0% to 0.50% molybdenum, 0% to 0.06% niobium, and a remaining weight percent of iron, and a carburized layer of above 0.35% by weight carbon from a surface of the carburized layer to a carburized layer depth, wherein the carburized layer depth is from 0.5 mm to 3.0 mm, wherein the carburized layer comprises a microstructure including martensite, retained austenite, carbide, and less than 2% by volume non-martensitic transformation products (NMTP), and wherein the carburized layer includes a prior austenite average grain size of 3.0-8.0 microns from the surface to a depth of at least 0.2 mm.Type: ApplicationFiled: March 18, 2020Publication date: September 23, 2021Applicant: Caterpillar Inc.Inventors: Michael A. PERSHING, Curtis A. HENNING, Robert J. PICKERILL, Scott A. JOHNSTON
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Publication number: 20170100772Abstract: A method for manufacturing an article from a metal alloy is described. The method includes supplying the metal alloy into a nozzle of a printing chamber, where temperature of the metal alloy is between a solidus and a liquidus temperature. Further, the method includes depositing the metal alloy in successive layers on a substrate plate, inside the printing machine, using the nozzle. The method also includes controlling movement of at least one of the nozzle and the substrate plate within the printing chamber based on an electronic data source of the article, where the electronic data source includes geometry of the article.Type: ApplicationFiled: October 7, 2015Publication date: April 13, 2017Applicant: Caterpillar Inc.Inventors: Scott A. Johnston, Cary J. Lyons, Christopher A. Barnes
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Publication number: 20160354850Abstract: A method of manufacturing a gear-cutting tool is disclosed. The gear-cutting tool includes a base portion and cutter teeth extended from the base portion. Each cutter tooth includes a cutting tip portion. The method initiates with hardening the gear-cutting tool with a first hardening process. Thereafter, coating the cutter teeth with a wear resistant material and then hardening the cutting tip portion of each of the cutter teeth with a second hardening process. In the second hardening process, the heat treat is directed to penetrate through the wear resistant material. This process imparts the heat treatment to the wear resistant material and the cutting tip portion of the cutter teeth of the gear-cutting tool.Type: ApplicationFiled: June 4, 2015Publication date: December 8, 2016Applicant: Caterpillar Inc.Inventors: GABRIEL J. ELLICOTT, Richard G. Marsh, Scott A. Johnston
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Patent number: 8347504Abstract: A method of manufacturing a fuel injector having high-flow orifices in its tip includes removing a bulb from a fuel injector tip having at least one spray orifice with a first diameter, and friction welding a slug to the fuel injector tip, including forming a fused interface of material of the slug and material of the fuel injector tip. The method further includes modifying the slug subsequent to friction welding the slug to the fuel injector tip, including forming a new bulb from the slug having at least one spray orifice therein with a different diameter than that of the removed bulb. A remanufactured fuel injector, and fuel injector tip, includes an injector tip body having a first tip portion of a first material and a second tip portion of a material compatible for friction welding with the first material.Type: GrantFiled: December 6, 2010Date of Patent: January 8, 2013Inventors: Karen Raab, James D. Sparks, Scott A. Johnston, Sami El-Sayed
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Publication number: 20110073681Abstract: A method of manufacturing a fuel injector having high-flow orifices in its tip includes removing a bulb from a fuel injector tip having at least one spray orifice with a first diameter, and friction welding a slug to the fuel injector tip, including forming a fused interface of material of the slug and material of the fuel injector tip. The method further includes modifying the slug subsequent to friction welding the slug to the fuel injector tip, including forming a new bulb from the slug having at least one spray orifice therein with a different diameter than that of the removed bulb. A remanufactured fuel injector, and fuel injector tip, includes an injector tip body having a first tip portion of a first material and a second tip portion of a material compatible for friction welding with the first material.Type: ApplicationFiled: December 6, 2010Publication date: March 31, 2011Applicant: Caterpillar Inc.Inventors: Karen Raab, James D. Sparks, Scott A. Johnston, Sami El-Sayed
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Patent number: 7866574Abstract: A method of manufacturing a fuel injector having high-flow orifices in its tip includes removing a bulb from a fuel injector tip having at least one spray orifice with a first diameter, and friction welding a slug to the fuel injector tip, including forming a fused interface of material of the slug and material of the fuel injector tip. The method further includes modifying the slug subsequent to friction welding the slug to the fuel injector tip, including forming a new bulb from the slug having at least one spray orifice therein with a different diameter than that of the removed bulb. A remanufactured fuel injector, and fuel injector tip, includes an injector tip body having a first tip portion of a first material and a second tip portion of a material compatible for friction welding with the first material.Type: GrantFiled: January 22, 2007Date of Patent: January 11, 2011Assignee: Caterpillar Inc.Inventors: Karen Raab, James D. Sparks, Scott A. Johnston, Sami El-Sayed
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Publication number: 20100025500Abstract: A fuel injector is disclosed. The fuel injector has an injector body and an injector needle located inside the injector body. At least one of the injector body and injector needle has a portion configured to be exposed to a combustion chamber, the portion including maraging or carburizing steel and having a nitrided outer layer.Type: ApplicationFiled: July 31, 2008Publication date: February 4, 2010Inventors: Michael J. Pollard, Petr Michlik, Jeff A. Jensen, Scott A. Johnston, Pingshun Zhao
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Publication number: 20080173733Abstract: A method of manufacturing a fuel injector having high-flow orifices in its tip includes removing a bulb from a fuel injector tip having at least one spray orifice with a first diameter, and friction welding a slug to the fuel injector tip, including forming a fused interface of material of the slug and material of the fuel injector tip. The method further includes modifying the slug subsequent to friction welding the slug to the fuel injector tip, including forming a new bulb from the slug having at least one spray orifice therein with a different diameter than that of the removed bulb. A remanufactured fuel injector, and fuel injector tip, includes an injector tip body having a first tip portion of a first material and a second tip portion of a material compatible for friction welding with the first material.Type: ApplicationFiled: January 22, 2007Publication date: July 24, 2008Inventors: Karen Raab, James D. Sparks, Scott A. Johnston, Sami El-Sayed
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Patent number: 6253392Abstract: A tub defines a volume for receiving a child and holding water in a top side at least when oriented in a reclined position, the tub having a back side, head and foot ends, and first and second arms connected by a front cross member. The first and second arms are pivotally attached to the tub about an axis displaced from the foot end of the tub into at least first and second positions. The front cross member is disposed above, and displaced from, the top side of the tub when the arms are in first position. An elongated member is attached to the front cross member at a first end and extends from the front cross member to a second end having a foot disposed below the foot end of the tub and adapted to engage a smooth surface. The elongated member extends toward the foot end of the tub to provide a passive crotch restraint for a child received by the tub when the arms are in first position.Type: GrantFiled: July 22, 1999Date of Patent: July 3, 2001Assignee: The First Years Inc.Inventors: Carl J. Conforti, Scott A. Johnstone, Glen Nielsen
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Patent number: RE38237Abstract: A fused fiber optic 1×4 or 2×4 coupler in which four optical fiber segments (A, B, C, D) extend longitudinally beside each other in a coupling region in which the fiber segments are at least partially fused together to form an assembly exhibiting a close packed cross section in which the fiber cores (11) are centered substantially at the corners of a four sided polygon having a pair or opposite internal acute angles substantially less than 90°.Type: GrantFiled: May 10, 2000Date of Patent: August 26, 2003Assignee: AOFR Pty. LimitedInventors: Martin C. Elias, Scott A. Johnston, Mark R. Hesling
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Patent number: D575102Type: GrantFiled: November 5, 2007Date of Patent: August 19, 2008Assignee: Tailor Made Products, IncInventors: Mohan Rajasekaran, Scott A. Johnstone, Michael Bryan Mennone
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Patent number: D411349Type: GrantFiled: April 22, 1998Date of Patent: June 22, 1999Assignee: The First Years Inc.Inventor: Scott A. Johnstone
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Patent number: D419785Type: GrantFiled: July 22, 1998Date of Patent: February 1, 2000Assignee: The First Years Inc.Inventors: Carl J. Conforti, Scott A. Johnstone, Glen Nielsen
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Patent number: D430737Type: GrantFiled: October 23, 1998Date of Patent: September 12, 2000Assignee: The First Years, Inc.Inventors: Ralph M. Nowak, Carl J. Conforti, Scott A. Johnstone, Glen Nielsen