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).

  • Publication number: 20240337160
    Abstract: 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: Application
    Filed: July 20, 2022
    Publication date: October 10, 2024
    Applicant: 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
  • Patent number: 12098466
    Abstract: 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: Grant
    Filed: March 8, 2023
    Date of Patent: September 24, 2024
    Assignee: Caterpillar Inc.
    Inventors: Michael A. Pershing, Curtis A. Henning, Robert J. Pickerill, Scott A. Johnston
  • Publication number: 20230220532
    Abstract: 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: Application
    Filed: March 8, 2023
    Publication date: July 13, 2023
    Applicant: Caterpillar Inc.
    Inventors: Michael A. PERSHING, Curtis A. HENNING, Robert J. PICKERILL, Scott A. JOHNSTON
  • Patent number: 11624106
    Abstract: 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: Grant
    Filed: March 18, 2020
    Date of Patent: April 11, 2023
    Assignee: Caterpillar Inc.
    Inventors: Michael A. Pershing, Curtis A. Henning, Robert J. Pickerill, Scott A. Johnston
  • Publication number: 20210292880
    Abstract: 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: Application
    Filed: March 18, 2020
    Publication date: September 23, 2021
    Applicant: Caterpillar Inc.
    Inventors: Michael A. PERSHING, Curtis A. HENNING, Robert J. PICKERILL, Scott A. JOHNSTON
  • Publication number: 20170100772
    Abstract: 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: Application
    Filed: October 7, 2015
    Publication date: April 13, 2017
    Applicant: Caterpillar Inc.
    Inventors: Scott A. Johnston, Cary J. Lyons, Christopher A. Barnes
  • Publication number: 20160354850
    Abstract: 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: Application
    Filed: June 4, 2015
    Publication date: December 8, 2016
    Applicant: Caterpillar Inc.
    Inventors: GABRIEL J. ELLICOTT, Richard G. Marsh, Scott A. Johnston
  • Patent number: 8347504
    Abstract: 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: Grant
    Filed: December 6, 2010
    Date of Patent: January 8, 2013
    Inventors: Karen Raab, James D. Sparks, Scott A. Johnston, Sami El-Sayed
  • Publication number: 20110073681
    Abstract: 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: Application
    Filed: December 6, 2010
    Publication date: March 31, 2011
    Applicant: Caterpillar Inc.
    Inventors: Karen Raab, James D. Sparks, Scott A. Johnston, Sami El-Sayed
  • Patent number: 7866574
    Abstract: 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: Grant
    Filed: January 22, 2007
    Date of Patent: January 11, 2011
    Assignee: Caterpillar Inc.
    Inventors: Karen Raab, James D. Sparks, Scott A. Johnston, Sami El-Sayed
  • Publication number: 20100025500
    Abstract: 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: Application
    Filed: July 31, 2008
    Publication date: February 4, 2010
    Inventors: Michael J. Pollard, Petr Michlik, Jeff A. Jensen, Scott A. Johnston, Pingshun Zhao
  • Publication number: 20080173733
    Abstract: 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: Application
    Filed: January 22, 2007
    Publication date: July 24, 2008
    Inventors: Karen Raab, James D. Sparks, Scott A. Johnston, Sami El-Sayed
  • Patent number: 6253392
    Abstract: 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: Grant
    Filed: July 22, 1999
    Date of Patent: July 3, 2001
    Assignee: The First Years Inc.
    Inventors: Carl J. Conforti, Scott A. Johnstone, Glen Nielsen
  • Patent number: RE38237
    Abstract: 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: Grant
    Filed: May 10, 2000
    Date of Patent: August 26, 2003
    Assignee: AOFR Pty. Limited
    Inventors: Martin C. Elias, Scott A. Johnston, Mark R. Hesling
  • Patent number: D575102
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: August 19, 2008
    Assignee: Tailor Made Products, Inc
    Inventors: Mohan Rajasekaran, Scott A. Johnstone, Michael Bryan Mennone
  • Patent number: D411349
    Type: Grant
    Filed: April 22, 1998
    Date of Patent: June 22, 1999
    Assignee: The First Years Inc.
    Inventor: Scott A. Johnstone
  • Patent number: D419785
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: February 1, 2000
    Assignee: The First Years Inc.
    Inventors: Carl J. Conforti, Scott A. Johnstone, Glen Nielsen
  • Patent number: D430737
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: September 12, 2000
    Assignee: The First Years, Inc.
    Inventors: Ralph M. Nowak, Carl J. Conforti, Scott A. Johnstone, Glen Nielsen