Patents by Inventor Daniel Lawrence Fadgen

Daniel Lawrence Fadgen 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).

  • Circumferential air riding carbon seal on ceramic runner
    Patent number: 11085540
    Abstract: Systems and methods are disclosed for sealing a high pressure fluid cavity from a low pressure fluid cavity in a rotating machine such as a gas turbine engine. The cavities are at least partially disposed between a rotatable shaft and a sump housing radially displaced from the rotatable shaft. A seal assembly comprises an air riding carbon seal ring and a circumferential ceramic runner. The carbon seal ring is sealingly engaged with the sump housing and has a radially inward facing seal surface. The circumferential ceramic runner is carried by the shaft and has a radially outward facing seal surface extending axially along the shaft. The radially inward facing seal surface of the air riding carbon seal ring sealingly engages the radially outward facing seal surface of the ceramic runner during rotation of the rotatable shaft at a predetermined range of rotational speeds.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: August 10, 2021
    Assignee: Rolls-Royce Corporation
    Inventors: Daniel Lawrence Fadgen, Jared Isamu Taketa, Joseph A. Swift, Daniel Feinstein
  • CIRCUMFERENTIAL AIR RIDING CARBON SEAL ON CERAMIC RUNNER
    Publication number: 20200173556
    Abstract: Systems and methods are disclosed for sealing a high pressure fluid cavity from a low pressure fluid cavity in a rotating machine such as a gas turbine engine. The cavities are at least partially disposed between a rotatable shaft and a sump housing radially displaced from the rotatable shaft. A seal assembly comprises an air riding carbon seal ring and a circumferential ceramic runner. The carbon seal ring is sealingly engaged with the sump housing and has a radially inward facing seal surface. The circumferential ceramic runner is carried by the shaft and has a radially outward facing seal surface extending axially along the shaft. The radially inward facing seal surface of the air riding carbon seal ring sealingly engages the radially outward facing seal surface of the ceramic runner during rotation of the rotatable shaft at a predetermined range of rotational speeds.
    Type: Application
    Filed: November 30, 2018
    Publication date: June 4, 2020
    Applicant: Rolls-Royce Corporation
    Inventors: Daniel Lawrence Fadgen, Jared Isamu Taketa, Joseph A. Swift, Daniel Feinstein