Patents by Inventor Dennis H. Gibson

Dennis H. Gibson 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).

  • Patent number: 10378535
    Abstract: A damping assembly for a valve is provided. The valve is configured to move between an open position and a close position. The valve includes a valve element and a valve stem disposed within a head. The damping assembly includes a damping chamber defined within the head. The damping assembly defines a sidewall. The damping assembly also includes a collar configured to receive the valve stem. The collar includes a collar stem. The collar also includes a collar head having an outer diameter. The collar head includes a side surface. The damping assembly includes a liquid passageway. The liquid passageway is being defined by a radial clearance between the side surface of the collar head and the sidewall of the damping chamber. The liquid passageway is configured to control a flow of a liquid as the valve moves between the open position and the closed position.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: August 13, 2019
    Assignee: Caterpillar Inc.
    Inventors: Sana Mahmood, Dennis H Gibson
  • Patent number: 10184436
    Abstract: A fluid injection system includes a fluid injector assembly; a fluid conditioning module having an outlet port that is fluidly coupled to an inlet port of the fluid injector assembly; an injector assembly outlet conduit fluidly coupled to an outlet port of the fluid injector assembly and disposed downstream of the fluid injector assembly, the injector assembly outlet conduit defining a pressure measurement port and a flow-restricting orifice, the pressure measurement port being disposed upstream of the flow-restricting orifice along the direction of fluid flow through the fluid injector assembly; a pressure sensor fluidly coupled to the pressure measurement port; and a controller operatively coupled to the fluid conditioning module and the pressure sensor. The controller is configured to adjust a flowrate of a fluid through the injector assembly inlet conduit based on a pressure signal from the pressure sensor.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: January 22, 2019
    Assignee: Caterpillar Inc.
    Inventors: Scott F. Shafer, Martin Lehman, Lifeng Wang, David E. Hackett, Taylor Tang, Andrew Marrack, Dennis H. Gibson
  • Publication number: 20180195500
    Abstract: A cryogenic fluid pump includes an outlet tube extending along the pump centerline, the outlet tube having an outlet passage that is fluidly in communication with the combined outlet and with a pump outlet opening, and a shroud that extends concentrically along the outlet tube and has an inner diameter that is larger than an outer diameter of the outlet tube such that a gap is formed in a radial direction between an inner surface of the shroud and an outer surface of the outlet tube, the gap extending along at least a portion of the outlet tube.
    Type: Application
    Filed: January 12, 2017
    Publication date: July 12, 2018
    Applicant: Caterpillar Inc.
    Inventors: Dana R. Coldren, Dennis H. Gibson, Ankababu Kandlagunta, Sridhar Thangaswamy, Alan R. Stockner
  • Publication number: 20180119693
    Abstract: A damping assembly for a valve is provided. The valve is configured to move between an open position and a close position. The valve includes a valve element and a valve stem disposed within a head. The damping assembly includes a damping chamber defined within the head. The damping assembly defines a sidewall. The damping assembly also includes a collar configured to receive the valve stem. The collar includes a collar stem. The collar also includes a collar head having an outer diameter. The collar head includes a side surface. The damping assembly includes a liquid passageway. The liquid passageway is being defined by a radial clearance between the side surface of the collar head and the sidewall of the damping chamber. The liquid passageway is configured to control a flow of a liquid as the valve moves between the open position and the closed position.
    Type: Application
    Filed: November 2, 2016
    Publication date: May 3, 2018
    Applicant: Caterpillar Inc.
    Inventors: Sana Mahmood, Dennis H. Gibson
  • Publication number: 20180100475
    Abstract: A fuel system is disclosed for use with an engine. The fuel system may have a common rail, a first type of fuel injector fluidly connected to the common rail, and a second type of fuel injector fluidly connected to the common rail. The second type of fuel injector may include a pumping portion having a bore formed therein, and a plunger reciprocatingly disposed in the bore. The second type of fuel injector may also include an accumulator portion fluidly connected to the common rail and configured to receive fuel pushed from the bore of the pumping portion by the plunger, a nozzle portion, and a valve portion fluidly connecting the pumping, nozzle, and accumulator portions.
    Type: Application
    Filed: October 7, 2016
    Publication date: April 12, 2018
    Applicant: Caterpillar Inc.
    Inventors: Scott F. SHAFER, Dennis H. GIBSON, Zhenyu (Jason) LI, Robert Michael CAMPION, Alan Ray STOCKNER, Satya Naga Deepak PILLARISETTI, George Kodikulam JOSEPH, Lifeng WANG
  • Patent number: 9890741
    Abstract: A dual fuel common rail engine supplies pressurized natural gas and liquid diesel fuel at different pressures through a co-axial quill assembly for direct injection from a single fuel injector into an engine cylinder. Pressure waves in the gaseous fuel common rail are damped in a pressure damping chamber of the co-axial quill assembly to promote consistent gaseous fuel injection rates and quantities from the fuel injector.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: February 13, 2018
    Assignee: Caterpillar Inc.
    Inventors: Dennis H. Gibson, Shivangini S. Hazari, Dana R. Coldren, Daniel R. Baldwin
  • Publication number: 20170016416
    Abstract: A fluid injection system includes a fluid injector assembly; a fluid conditioning module having an outlet port that is fluidly coupled to an inlet port of the fluid injector assembly; an injector assembly outlet conduit fluidly coupled to an outlet port of the fluid injector assembly and disposed downstream of the fluid injector assembly, the injector assembly outlet conduit defining a pressure measurement port and a flow-restricting orifice, the pressure measurement port being disposed upstream of the flow-restricting orifice along the direction of fluid flow through the fluid injector assembly; a pressure sensor fluidly coupled to the pressure measurement port; and a controller operatively coupled to the fluid conditioning module and the pressure sensor. The controller is configured to adjust a flowrate of a fluid through the injector assembly inlet conduit based on a pressure signal from the pressure sensor.
    Type: Application
    Filed: July 17, 2015
    Publication date: January 19, 2017
    Applicant: Caterpillar Inc.
    Inventors: Scott F. Shafer, Martin Lehman, Lifeng Wang, David E. Hackett, Taylor Tang, Andrew Marrack, Dennis H. Gibson
  • Publication number: 20150361925
    Abstract: A dual fuel common rail engine supplies pressurized natural gas and liquid diesel fuel at different pressures through a co-axial quill assembly for direct injection from a single fuel injector into an engine cylinder. Pressure waves in the gaseous fuel common rail are damped in a pressure damping chamber of the co-axial quill assembly to promote consistent gaseous fuel injection rates and quantities from the fuel injector.
    Type: Application
    Filed: August 27, 2015
    Publication date: December 17, 2015
    Applicant: Caterpillar Inc.
    Inventors: Dennis H. Gibson, Shivangini S. Hazari, Dana R. Coldren, Daniel R. Baldwin
  • Patent number: 9181881
    Abstract: A dual fuel common rail engine supplies pressurized natural gas and liquid diesel fuel at different pressures through a co-axial quill assembly for direct injection from a single fuel injector into an engine cylinder. Each coaxial quill assembly includes a matched pair of inner and outer quills that are chosen to have dimensions that allow both quills to sealingly engage each fuel injector at a common conical seat responsive to a clamping force applied along an axis. Matched pairs of inner and outer quills are retained together during pre-installation handling with a retainer that is left between the inner and outer quills after installation in an engine.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: November 10, 2015
    Assignee: Caterpillar Inc.
    Inventors: Daniel R. Baldwin, Dennis H. Gibson, Dana R. Coldren, Mark F. Sommars
  • Publication number: 20140352664
    Abstract: The present disclosure is related to a flow limiting system for a dual fuel engine is disclosed. The flow limiting system includes a first valve configured to regulate a flow of a liquid fuel therethrough based on a pressure difference across the first valve. The flow limiting system further includes a second valve configured to regulate a flow of a gaseous fuel therethrough based on a pressure difference across the second valve. The second valve includes a valve body movably provided within a valve chamber. The valve body includes a control orifice extending therethrough. The valve body also includes grooves defined on an outer surface thereof.
    Type: Application
    Filed: August 15, 2014
    Publication date: December 4, 2014
    Inventors: Dana R. Coldren, Dennis H. Gibson, Sana Mahmood, Sunil J. Bean
  • Publication number: 20140069387
    Abstract: In one aspect, a common rail fuel system includes a plurality of fuel injectors that each include an injector body defining a first fuel inlet fluidly connected to a first common rail and a second fuel inlet fluidly connected to a second common rail. Liquid fuel injection from a first nozzle outlet set is facilitated by energizing a first electrical actuator to open a direct operated check. Injection of gaseous fuel from a second nozzle outlet set is facilitated by energizing a second electrical actuator to open an admission valve to flood a gaseous nozzle chamber with high pressure gaseous fuel above a valve opening pressure that opens a conventional spring biased check to facilitate gaseous fuel injection out of second nozzle outlet set.
    Type: Application
    Filed: September 7, 2012
    Publication date: March 13, 2014
    Applicant: CATERPILLAR INC.
    Inventors: Cory A. Brown, Dennis H. Gibson
  • Publication number: 20140034020
    Abstract: A dual fuel common rail engine supplies pressurized natural gas and liquid diesel fuel at different pressures through a co-axial quill assembly for direct injection from a single fuel injector into an engine cylinder. Each coaxial quill assembly includes a matched pair of inner and outer quills that are chosen to have dimensions that allow both quills to sealingly engage each fuel injector at a common conical seat responsive to a clamping force applied along an axis. Matched pairs of inner and outer quills are retained together during pre-installation handling with a retainer that is left between the inner and outer quills after installation in an engine.
    Type: Application
    Filed: August 3, 2012
    Publication date: February 6, 2014
    Applicant: CATERPILLAR INC.
    Inventors: Daniel R. Baldwin, Dennis H. Gibson, Dana R. Coldren, Mark F. Sommars
  • Patent number: 8590815
    Abstract: Steel rod stock is shaped into a fuel injector tip having a central axis and including a shank extending between a mating end and a nozzle end. An inner surface of the fuel injector tip includes a conical needle valve seat and defines a nozzle chamber and a sac on opposite sides of the needle valve seat. The mating end includes a injector stack surface and an injector body contact surface. After shaping the fuel injector tip, it is a case hardened to a hardness in excess of HRC 55. Next, the nozzle end is shaped, after the case hardening step, to include a plurality of nozzle surfaces that each define one of a plurality of nozzle outlets extending between the sac and the outer surface. The inner surface and the nozzle surfaces are then autofrettaged to induce compressive residual stress at the case hardened needle valve seat, the case hardened sac and at least a portion of the nozzle surfaces closest to the sac.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: November 26, 2013
    Assignee: Caterpillar Inc.
    Inventors: Petr Michlik, Ajay Tomar, Dennis H. Gibson
  • Publication number: 20130160747
    Abstract: The present disclosure is directed to a system for running an engine. The system includes a first tank, a second tank, a pump, a vaporizer, and a heat source. The first tank stores liquid natural gas (LNG). The pump is in communication with the first tank and is configured to pump the LNG from the first tank. The vaporizer is in communication with the pump. The vaporizer is configured to receive the LNG from the first tank via the pump and convert the LNG into compressed natural gas (CNG). The second tank is in communication with the vaporizer. The second tank is configured to store CNG. A heat source is in communication with the second tank. The heat source uses the stored CNG to apply heat to the vaporizer.
    Type: Application
    Filed: December 23, 2011
    Publication date: June 27, 2013
    Applicant: Caterpillar Inc.
    Inventors: Dennis H. Gibson, Vishnu Irigireddy
  • Patent number: 8322004
    Abstract: A metallic fuel system component includes an internal surface and an external surface. The metallic fuel system component is made by inducing compressive residual stress in only a portion of the internal surface of the metallic fuel system component by transmitting a laser shock wave through the metallic fuel system component from the external surface to the internal surface.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: December 4, 2012
    Assignee: Caterpilar Inc.
    Inventors: Stephen R. Lewis, Alan R. Stockner, Dennis H. Gibson, Marion B. Grant, Jr., Avinash R. Manubolu
  • Patent number: 8240014
    Abstract: A method of fabricating a piezo actuator is disclosed. The method includes forcing a blank against a mold to form a cylindrical casing having an open end and a closed end and rotating the cylindrical casing. The method also includes urging a die having a plurality of equally spaced protrusions into a surface of the cylindrical casing to form bellows in the cylindrical casing. The method further includes positioning a piezo element within the cylindrical casing.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: August 14, 2012
    Assignee: Caterpillar Inc.
    Inventors: Dennis H. Gibson, Jinhui Sun
  • Publication number: 20110315793
    Abstract: Steel rod stock is shaped into a fuel injector tip having a central axis and including a shank extending between a mating end and a nozzle end. An inner surface of the fuel injector tip includes a conical needle valve seat and defines a nozzle chamber and a sac on opposite sides of the needle valve seat. The mating end includes a injector stack surface and an injector body contact surface. After shaping the fuel injector tip, it is a case hardened to a hardness in excess of HRC 55. Next, the nozzle end is shaped, after the case hardening step, to include a plurality of nozzle surfaces that each define one of a plurality of nozzle outlets extending between the sac and the outer surface. The inner surface and the nozzle surfaces are then autofrettaged to induce compressive residual stress at the case hardened needle valve seat, the case hardened sac and at least a portion of the nozzle surfaces closest to the sac.
    Type: Application
    Filed: June 24, 2010
    Publication date: December 29, 2011
    Applicant: CATERPILLAR INC.
    Inventors: Petr Michlik, Ajay Tomar, Dennis H. Gibson
  • Publication number: 20100276520
    Abstract: A metallic fuel system component includes an internal surface and an external surface. The metallic fuel system component is made by inducing compressive residual stress in only a portion of the internal surface of the metallic fuel system component by transmitting a laser shock wave through the metallic fuel system component from the external surface to the internal surface.
    Type: Application
    Filed: April 29, 2009
    Publication date: November 4, 2010
    Applicant: Caterpillar Inc.
    Inventors: Stephen R. Lewis, Alan R. Stockner, Dennis H. Gibson, Marion B. Grant, JR., Avinash R. Manubolu
  • Patent number: 7762238
    Abstract: Pressurized injector actuation fluid, such as oil or fuel, is supplied to high pressure common rail by a fixed displacement fluid pump. Variable delivery from the pump is achieved by an improved sleeve metering approach. The sleeve surrounds the reciprocating piston and is manipulated to control venting of pumped fluid through vent ports in the piston. The sleeve is moved by preferably being the armature of a solenoid assembly. The varying of current to the solenoid coil alters the axial position of the sleeve relative to the piston to vary the effective pumping stroke of the piston.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: July 27, 2010
    Assignee: Caterpillar Inc.
    Inventors: Dennis H. Gibson, Mark F. Sommars
  • Patent number: 7588012
    Abstract: A fuel injector for a work machine is disclosed. The fuel injector has nozzle member having at least one orifice and a needle valve element having a tip end. The needle valve element is axially movable to selectively allow and block fuel flow through the at least one orifice with the tip end. The fuel injector also has at least one supply passageway in communication with the tip end of the needle valve and a variable restrictive device disposed within the at least one supply passageway.
    Type: Grant
    Filed: November 9, 2005
    Date of Patent: September 15, 2009
    Assignee: Caterpillar Inc.
    Inventors: Dennis H. Gibson, Mark F. Sommars, Jinhui Sun