Patents Represented by Attorney Frank L. Hart
  • Patent number: 5676436
    Abstract: A positive drive endless rubber belted track is adapted to be attached to track links of an endless track link assembly. The particular construction of the core and grousers of the belted track permit the rubber belted track to stretch as it passes over the driving mechanism and idler of the machine.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: October 14, 1997
    Assignee: Caterpillar Inc.
    Inventor: Cullen P. Hart
  • Patent number: 5653101
    Abstract: A method for treating exhaust gas stream of an engine for the removal of NOx by mixing a NOx reducing fluid and air together with the exhaust gas and subsequently cooling the treated exhaust gas stream prior to contact with the deNOx catalyst.
    Type: Grant
    Filed: June 19, 1995
    Date of Patent: August 5, 1997
    Assignee: Caterpillar Inc.
    Inventors: William H. Lane, Randy N. Peterson, Aaron L. Smith
  • Patent number: 5647504
    Abstract: A fluid filter, such as an oil filter for example, has a canister, a top plate and a sealing ring. The sealing ring overlaps portions of the top plate and canister. The sealing ring and canister are joined one to the other by laser welding about the sealing ring adjacent the canister and forming a mechanical lock between the canister and the top plate by mixing of materials.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: July 15, 1997
    Assignee: Caterpillar Inc.
    Inventors: David F. Gullett, Ronald T. Taylor, Daniel J. Techtow
  • Patent number: 5620645
    Abstract: A process for forming elements for use in high temperature environments includes the following steps. The process mixes metal and/or metal compounds with orthophosphoric acid and adds a filler to form a moldable material. The moldable material is dried at a temperature less than about 100 degrees to form a stable unitary mass and thereafter the temperature is increased to its "false melt" temperature. Pressure is then subjected on the element while maintaining the element at its false melt temperature for densifying the element to a preselected porosity and deforming the element to preselected final dimensions.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: April 15, 1997
    Assignee: Caterpillar Inc.
    Inventors: Jill E. Crumpacker, Chuong Q. Dam, Virgil R. Hester, Kurtis C. Kelley
  • Patent number: 5593607
    Abstract: A glow plug has a heating element and a ceramic silicon nitride tip which has an outer surface. A low porosity refractory metal oxide coating covers at least a portion of the tip outer surface. A catalyst wire, with a diameter of 0.008 inches, is wrapped about and connected to the coated glow plug tip. The wire is formed of one of the platinum group metals and the wire is free of charge carrying connection to a power source.
    Type: Grant
    Filed: June 21, 1995
    Date of Patent: January 14, 1997
    Assignee: Caterpillar Inc.
    Inventors: Chuong Q. Dam, Kent A. Koshkarian, Martin L. Willi
  • Patent number: 5590629
    Abstract: A spark ignition system of an internal combustion engine has a plurality of electrodes operating at high voltages to produce a plurality of sparks across the combustion zone. The construction of the system permits the formation of long length sparks while substantially maintain the utilization of customary electrical wiring sizes.
    Type: Grant
    Filed: September 14, 1995
    Date of Patent: January 7, 1997
    Assignee: Caterpillar Inc.
    Inventors: George Codina, Donald R. Krull, J. Thomas Vachon
  • Patent number: 5580476
    Abstract: A glow plug has a heating element having a tip formed of a preselected material includes a catalyst wire wrapped about and in intimate contact with the preselected material of the glow plug. The catalyst is formed of one of the platinum group metals, transition metals and combinations thereof and is in the form a wire with a diameter of 0.008 inches. The catalyst is free of charge carrying connection to a power source.
    Type: Grant
    Filed: June 21, 1995
    Date of Patent: December 3, 1996
    Assignee: Caterpillar Inc.
    Inventors: Chuong Q. Dam, Kent A. Koshkarian, Martin L. Willi
  • Patent number: 5566549
    Abstract: Apparatus and a method control the passage of gases into and from a combustion cylinder of an engine. Each combustion cylinder of the engine is associated with a respective induction-compression and an exhaust-expansion cylinder and the compressed gases of these cylinders are controllably passed at preselected intervals from one cylinder to the next.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: October 22, 1996
    Assignee: Caterpillar Inc.
    Inventor: John M. Clarke
  • Patent number: 5535711
    Abstract: A temperature controlling apparatus is adapted for association with preselected fluid systems of an internal combustion engine expected to be used in extremely cold atmospheres. The apparatus has a heater associated with a heat transfer reservoir which surrounds the fluid reservoir of the engine desired to be heated.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: July 16, 1996
    Assignee: Caterpillar Inc.
    Inventor: Edwin A. Kach
  • Patent number: 5522358
    Abstract: A fluid system of an engine which has an outwardly opening engine valve controls fluid delivery and removal from first and second cylinders for controlling the position of the engine valve and injection of fuel responsive to the position of the engine piston.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: June 4, 1996
    Assignee: Caterpillar Inc.
    Inventor: John M. Clarke
  • Patent number: 5507261
    Abstract: An on/off compression braking system is provided which when actuated controllably opens one inlet valve and one outlet valve in response to the actuation of the injector unit rocker arm and deactivates the exhaust valve rocker arm. This braking system thereby is useful on four cycle engines and is of a construction which eliminates elements of heretofore utilized compression braking systems and provides a four cycle engine with a two cycle compression braking system.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: April 16, 1996
    Assignee: Caterpillar Inc.
    Inventor: John L. Johnson, Jr.
  • Patent number: 5495838
    Abstract: A compression braking system is provided which controllably opens one inlet valve and one outlet valve in response to the actuation of the injector unit rocker arm. This braking system thereby is useful on four cycle engines and is of a construction which eliminates elements of heretofore utilized compression braking systems.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: March 5, 1996
    Assignee: Caterpillar Inc.
    Inventor: John L. Johnson, Jr.
  • Patent number: 5491619
    Abstract: A headlight of a working machine which is exposed to heavy impact shocks, vibrations, and heat build up has a heat conducting metal element in heat conducting contact with the headlight bulb. The heat conducting metal element is isolated from shock loads and vibration thereby protecting the fragile illuminating element of the light bulb.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: February 13, 1996
    Assignee: Caterpillar Inc.
    Inventor: Avtar S. Gill
  • Patent number: 5484226
    Abstract: The invention is directed to automated controls of an asphalt paver wherein the speed of the conveyor is automatically controlled at a rate proportional and responsive to the speed of the auger and the conveyer is free from having a material sensor and speed control responsive thereto.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: January 16, 1996
    Assignee: Caterpillar Paving Products Inc.
    Inventors: David Emerson, Andrew W. Green
  • Patent number: 5484248
    Abstract: An endless track transporter is provided moving the semi-trailer of an on-highway wheeled tractor-trailer over terrain where it is desirable to exert low ground pressure. The transporter has a gate system which is controllably moveable for clearing the landing gear of the semi-trailer during hitching of the transporter to the semi-trailer.
    Type: Grant
    Filed: October 20, 1994
    Date of Patent: January 16, 1996
    Assignee: Caterpillar Inc.
    Inventor: Robert J. Purcell
  • Patent number: 5473829
    Abstract: A carbide insert having fracture orienting grooves and a method for forming a cutting element for an earthworking machine. The carbide insert is placed in a groove formed on the cutting edge of the cutting element and there maintained by deforming walls of the cutting element into intimate contact with the carbide insert.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: December 12, 1995
    Assignee: Caterpillar Inc.
    Inventors: Richard L. Adrian, Phillip J. Shankwitz
  • Patent number: 5452839
    Abstract: An electric stud gun positioning apparatus is attachable to a collar of a stud gun and has making parts for aligning and orienting the stud relative to a part on which the stud is to be welded.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: September 26, 1995
    Assignee: Solar Turbines Incorporated
    Inventors: John J. Kapusnik, John A. Campbell, Richard B. Griffin
  • Patent number: 5417142
    Abstract: A system for hydraulically amplifying the deflection of a deflectable, resilient member into a greater displacement of a subject member. The system includes a deflectable resilient member, a fluid filled space in the pathway of and into which the deflectable, resilient member is deflectable, a subject member adjacent the fluid filled space, and an electroexpansive module for deflecting the deflectable, resilient member into the fluid filled space, wherein when the deflectable, resilient member is deflected into the fluid filled space the hydraulic pressure of the fluid in the space increases and acts against the subject member displacing the subject member a distance greater than the deflection of the deflectable, resilient member.
    Type: Grant
    Filed: May 18, 1994
    Date of Patent: May 23, 1995
    Assignee: Caterpillar Inc.
    Inventor: Craig W. Lohmann
  • Patent number: 5404716
    Abstract: A manifold of an engine has a liner, a housing and an insulating element covering and extending about the liner between the liner and the housing. The external surface of the housing is free of insulating elements. The insulating element is quilted and has ceramic fiber encased within fiberglass.
    Type: Grant
    Filed: February 24, 1994
    Date of Patent: April 11, 1995
    Assignee: Caterpillar Inc.
    Inventors: Alan W. Wells, Michael H. Haselkorn, Robert L. Miller, Leslie C. Morris, Michael C. Long
  • Patent number: 5397199
    Abstract: A screed assembly has a screed plate that is formed of a material having a thermal conductivity of less than about 25 W/mK, and a thermal barrier material having a thermal conductivity of less than about 0.5 W/mK that substantially covers an upper surface of the screed plate. The low thermal conductance properties of the screed plate obviate the need for auxiliary heating systems to preheat or maintain the screed plate in thermal equilibrium with a paving material.
    Type: Grant
    Filed: August 6, 1993
    Date of Patent: March 14, 1995
    Assignee: Caterpillar Paving Products Inc.
    Inventors: John J. Frampton, John A. Grassi, Karen R. Raab, Richard G. Eaton