Patents by Inventor Duane Bergmann

Duane Bergmann 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).

  • Turboexpander labyrinth seal
    Patent number: 12241552
    Abstract: There is disclosed a labyrinth seal arrangement for gas turboexpanders and the like which reduces process gas losses. The labyrinth seal includes a plurality of axially spaced seal sets with teeth facing a seal member. A plurality of vent ports in between each seal set permits extraction of gradually lower pressure process gas.
    Type: Grant
    Filed: May 8, 2023
    Date of Patent: March 4, 2025
    Assignee: ACD, LLC
    Inventors: Duane Bergmann, John Park, Asit Singhal, Geoff Legg
  • TURBOEXPANDER LABYRINTH SEAL
    Publication number: 20230272856
    Abstract: There is disclosed a labyrinth seal arrangement for gas turboexpanders and the like which reduces process gas losses. The labyrinth seal includes a plurality of axially spaced seal sets with teeth facing a seal member. A plurality of vent ports in between each seal set permits extraction of gradually lower pressure process gas.
    Type: Application
    Filed: May 8, 2023
    Publication date: August 31, 2023
    Inventors: Duane Bergmann, John Park, Asit Singhal, Geoff Legg
  • Turboexpander labyrinth seal
    Patent number: 11686390
    Abstract: There is disclosed a labyrinth seal arrangement for gas turboexpanders and the like which reduces process gas losses. The labyrinth seal includes a plurality of axially spaced seal sets with teeth facing a seal member. A plurality of vent ports in between each seal set permits extraction of gradually lower pressure process gas.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: June 27, 2023
    Assignee: ACD, LLC
    Inventors: Duane Bergmann, John Park, Asit Singhal, Geoff Legg
  • TURBOEXPANDER LABYRINTH SEAL
    Publication number: 20200200273
    Abstract: There is disclosed a labyrinth seal arrangement for gas turboexpanders and the like which reduces process gas losses. The labyrinth seal includes a plurality of axially spaced seal sets with teeth facing a seal member. A plurality of vent ports in between each seal set permits extraction of gradually lower pressure process gas.
    Type: Application
    Filed: December 23, 2019
    Publication date: June 25, 2020
    Inventors: Duane Bergmann, John Park, Asit Singhal, Geoff Legg
  • Portable gas filling system
    Patent number: 9945517
    Abstract: A portable gas filling system for transfer of cryogenic fluids to high pressure gas cylinders includes a moveable platform, a cryogenic fluid pump for connection to an off platform cryogenic fluid Dewar, and a vaporizer for connection between the fluid pump and gas cylinders. A vacuum pump is provided for purging of interconnecting system lines and a gas accumulator interconnected to the system lines enables storage of gas to pressurize the Dewar.
    Type: Grant
    Filed: September 8, 2009
    Date of Patent: April 17, 2018
    Assignee: ACD COMPANY
    Inventors: Craig Fennessy, Duane Bergmann
  • PORTABLE GAS FILLING SYSTEM
    Publication number: 20110056217
    Abstract: A portable gas filling system for transfer of cryogenic fluids to high pressure gas cylinders includes a moveable platform, a cryogenic fluid pump for connection to an off platform cryogenic fluid Dewar, and a vaporizer for connection between the fluid pump and gas cylinders. A vacuum pump is provided for purging of interconnecting system lines and a gas accumulator interconnected to the system lines enables storage of gas to pressurize the Dewar.
    Type: Application
    Filed: September 8, 2009
    Publication date: March 10, 2011
    Inventors: CRAIG FENNESSY, DUANE BERGMANN
  • Waste heat recovery system
    Patent number: 6742337
    Abstract: A waste heat recovery system comprising ducting to which hot gas is communicated, means to supply lower temperature diluent gas to the ducting, to mix with the hot gas, and produce a reduced temperature mixed gas stream, a vaporizer in communication with the ducting, to receive the stream and to transfer heat from the stream to a working fluid in the vaporizer to vaporize said fluid, and a blower operating to displace the stream through the vaporizer.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: June 1, 2004
    Assignee: Energent Corporation
    Inventors: Lance G. Hays, Duane Bergmann