Patents by Inventor Thomas O. Hahn

Thomas O. Hahn 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: 8997715
    Abstract: This disclosure provides a fuel system for supplying fuel to an internal combustion engine, an internal combustion engine that includes such a fuel system, a connector for connecting a single-walled high pressure common rail to a double-walled fuel line segment, and a fluid containment system. Each embodiment includes drain plumbing having a leakage drain connector that can be used to provide an interface between a single-walled high pressure common rail and a double-walled high pressure fuel line segment, and also provide part of a low pressure passage fluidly connected with a low pressure passage of the double-walled high pressure fuel line segment. The drain plumbing also can provide an interface with a low pressure fuel drain line fluidly coupled to a leakage detector.
    Type: Grant
    Filed: May 8, 2011
    Date of Patent: April 7, 2015
    Assignee: Cummins Intellectual Properties, Inc.
    Inventors: Joseph Worthington, Thomas O. Hahn, Vijay Sonawane, Prasad Khedekar, Dave Richter, Josh Knight
  • Patent number: 8844503
    Abstract: A fuel supply system and method of controlling fuel flow through a supply system is provided including a variable flow, i.e. speed, electric fuel transfer pump and a control system adapted to variably control the transfer pump based on fuel demand of the engine. The system provides improved transient response by providing the transfer pump with a feed forward speed/flow command based on engine fueling demand determined based on engine operating conditions. The transfer pump is controlled based on fuel demand not necessarily achieved yet by the high pressure pump and injectors. Therefore, this system controls the EFTP substantially simultaneously with controlling the high pressure pump and injectors to optimize fuel flow through the entire system ensuring the minimum required fuel flow is passing through the second the fuel filtration system, hence maximizing steady state fuel filtration efficiency, and minimizing surge effects on filtration efficiency.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: September 30, 2014
    Assignee: Cummins Intellectual Property, Inc.
    Inventors: Joseph A. Worthington, Norman C. Blizard, David P. Genter, Gregory S. Franks, Michael F. Mattern, Thomas O. Hahn, James L. Walls, Edward N. Linen
  • Patent number: 8752527
    Abstract: This disclosure provides a fuel line assembly for use with an internal combustion engine, an internal combustion engine including such as fuel line assembly, and a method for providing leak containment and detection in a fuel system, each of which include a double-walled fuel line including a high pressure fuel line component. The double-walled fuel line includes a high pressure fuel line, a jacket surrounding the high pressure fuel line, and a low pressure passage between the high pressure fuel line and the jacket. A fuel line nut includes a main body that houses a portion of the high pressure fuel line, and a first end portion supporting an enlarged end portion of the high pressure fuel line protruding from the first end portion. A second end portion of the fuel line nut sealingly connects to the jacket to extend the low pressure passage into an area between the main body and the housed high pressure fuel line.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: June 17, 2014
    Assignee: Cummins Intellectual Properties, Inc.
    Inventors: Joseph Worthington, Thomas O. Hahn, Vijay Sonawane, Prasad Khedekar, Dave Richter, Josh Knight
  • Patent number: 8733324
    Abstract: This disclosure relates a system for heating fuel supplied by a common rail fuel supply to an internal combustion engine. The system includes a high pressure fuel line, plural fuel injectors connected in series along the high pressure fuel line in the common rail, and a continuous low pressure passage including a heat exchanging portion in close proximity to the high pressure fuel line. A heated fluid source is operative to fluidly communicate with the continuous low pressure passage and circulate heated fluid to heat fuel present in the high pressure fuel line prior to, and during a cold start operation of the internal combustion engine. Other embodiments relate to a method of providing fuel to an internal combustion engine that includes sensing the temperature of fuel supplied to a fuel system and determining whether the sensed fuel temperature is greater than a predetermined value.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: May 27, 2014
    Assignee: Cummins Intellectual Properties, Inc.
    Inventors: Norman C. Blizard, Thomas O. Hahn, Cary J. Marston, Damon C. Salo, Kent A. Lobsiger
  • Publication number: 20120073545
    Abstract: A fuel supply system and method of controlling fuel flow through a supply system is provided including a variable flow, i.e. speed, electric fuel transfer pump and a control system adapted to variably control the transfer pump based on fuel demand of the engine. The system provides improved transient response by providing the transfer pump with a feed forward speed/flow command based on engine fueling demand determined based on engine operating conditions. The transfer pump is controlled based on fuel demand not necessarily achieved yet by the high pressure pump and injectors. Therefore, this system controls the EFTP substantially simultaneously with controlling the high pressure pump and injectors to optimize fuel flow through the entire system ensuring the minimum required fuel flow is passing through the second the fuel filtration system, hence maximizing steady state fuel filtration efficiency, and minimizing surge effects on filtration efficiency.
    Type: Application
    Filed: September 23, 2011
    Publication date: March 29, 2012
    Inventors: Joseph A. WORTHINGTON, Norman C. BLIZARD, David P. GENTER, Gregory S. FRANKS, Michael F. MATTERN, Thomas O. HAHN, James L. WALLS, Edward N. LINEN
  • Publication number: 20120006299
    Abstract: This disclosure provides a fuel line assembly for use with an internal combustion engine, an internal combustion engine including such as fuel line assembly, and a method for providing leak containment and detection in a fuel system, each of which include a double-walled fuel line including a high pressure fuel line component. The double-walled fuel line includes a high pressure fuel line, a jacket surrounding the high pressure fuel line, and a low pressure passage between the high pressure fuel line and the jacket. A fuel line nut includes a main body that houses a portion of the high pressure fuel line, and a first end portion supporting an enlarged end portion of the high pressure fuel line protruding from the first end portion. A second end portion of the fuel line nut sealingly connects to the jacket to extend the low pressure passage into an area between the main body and the housed high pressure fuel line.
    Type: Application
    Filed: May 10, 2011
    Publication date: January 12, 2012
    Applicant: CUMMINS INTELLECTUAL PROPERTIES, INC.
    Inventors: Joseph WORTHINGTON, Thomas O. HAHN, Vijay SONAWANE, Prasad KHEDEKAR, Dave RICHTER, Josh KNIGHT
  • Publication number: 20120006297
    Abstract: This disclosure provides a fuel system for supplying fuel to an internal combustion engine, an internal combustion engine that includes such a fuel system, a connector for connecting a single-walled high pressure common rail to a double-walled fuel line segment, and a fluid containment system. Each embodiment includes drain plumbing having a leakage drain connector that can be used to provide an interface between a single-walled high pressure common rail and a double-walled high pressure fuel line segment, and also provide part of a low pressure passage fluidly connected with a low pressure passage of the double-walled high pressure fuel line segment. The drain plumbing also can provide an interface with a low pressure fuel drain line fluidly coupled to a leakage detector.
    Type: Application
    Filed: May 8, 2011
    Publication date: January 12, 2012
    Applicant: CUMMINS INTELLECTUAL PROPERTIES, INC.
    Inventors: Joseph WORTHINGTON, Thomas O. HAHN, Vijay SONAWANE, Prasad KHEDEKAR, Dave RICHTER, Josh KNIGHT
  • Publication number: 20110214643
    Abstract: This disclosure relates a system for heating fuel supplied by a common rail fuel supply to an internal combustion engine. The system includes a high pressure fuel line, plural fuel injectors connected in series along the high pressure fuel line in the common rail, and a continuous low pressure passage including a heat exchanging portion in close proximity to the high pressure fuel line. A heated fluid source is operative to fluidly communicate with the continuous low pressure passage and circulate heated fluid to heat fuel present in the high pressure fuel line prior to, and during a cold start operation of the internal combustion engine. Other embodiments relate to a method of providing fuel to an internal combustion engine that includes sensing the temperature of fuel supplied to a fuel system and determining whether the sensed fuel temperature is greater than a predetermined value.
    Type: Application
    Filed: February 1, 2011
    Publication date: September 8, 2011
    Applicant: CUMMINS INTELLETUAL PROPERTIES, INC.
    Inventors: Norman C. BLIZARD, Thomas O. HAHN, Cary J. MARSTON, Damon C. SALO, Kent A. LOBSIGER
  • Patent number: 5125726
    Abstract: Device for the presentation of objects, comprising at least one pane made of transparent material and having one or more sections made nontransparent, the inner surfaces of said sections being provided with fixing or attachment elements for joining the pane(s) with other parts of said device and/or for supporting accessory means. By means of said concealed fixing or attachment elements, the construction of which is therefore simple and moderate in price, a frameless joining of the pane(s) to form a device with continuous, uninterrupted panes is possible in which all the accessory means such as intermediate display platforms, illumination means, dust protection means, etc., which required heretofore complicated base portions and understructures and hood constructions, are directly attached on the nontransparent sections of the inner surfaces of the panes.
    Type: Grant
    Filed: January 28, 1987
    Date of Patent: June 30, 1992
    Assignee: Glasbau Hahn GmbH + Co. KG
    Inventors: Till H. Hahn, Klaus H. Fischer, Thomas O. Hahn
  • Patent number: 4828784
    Abstract: A method of producing a layer of plastics material between two glass panes and an apparatus for performing said method, wherein the plastics material is filled in liquid form between the two glass panes which are in an inclined or vertical position and maintained parallel and sealed at their outer edges, are characterized in that the two glass panes are pressed against each other at their outer surfaces by one or a plurality of rotatable devices to achieve pressure guided in parallel and extending preferably over the total width of the glass panes, which pressure devices are movable along the total length of the glass panes, and that the pressure devices are moved at the curing rate of the plastics material from one end of the glass panes to the other end of the glass panes relative thereto.
    Type: Grant
    Filed: August 19, 1987
    Date of Patent: May 9, 1989
    Assignee: UCB S.A.
    Inventor: Thomas O. Hahn
  • Patent number: 4696613
    Abstract: A positioning arrangement for use with a device having a fixed or movable crane arm includes a suction device for plate-shaped bodies which hangs from the free end of the crane arm, the suction device being provided with a tilting device. The tilting device is infinitely variable by a setting mechanism. In this way, the center of gravity of the suction device with the plate-shaped body attached by suction may be adjusted such that the plate-shaped body is kept vertically.
    Type: Grant
    Filed: September 16, 1985
    Date of Patent: September 29, 1987
    Assignee: Glasbau Hahn GmbH & Co.Kg.
    Inventor: Thomas O. Hahn