Patents by Inventor Daniel L. Fadgen

Daniel L. 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 archbound carbon seal on ceramic runner
    Patent number: 11255436
    Abstract: A seal assembly is disclosed for sealing a high pressure fluid cavity from a low pressure fluid cavity. The cavities are at least partially disposed between a rotatable shaft and a sump housing. The seal assembly comprises a circumferential runner and a seal ring. The circumferential runner is carried by the shaft and has a radially outward facing seal surface extending axially along the shaft. The seal ring is sealing engaged with the sump housing and has a radially inward facing seal surface that sealingly engages the radially outward facing seal surface of the runner. The runner and the seal ring are formed from materials having coefficients of thermal expansion that are matched to effect sealing engagement between the runner and the seal ring over a predetermined range of operating temperatures.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: February 22, 2022
    Assignee: Rolls-Royce Corporation
    Inventors: Daniel L. Fadgen, John Munson
  • CIRCUMFERENTIAL ARCHBOUND CARBON SEAL ON CERAMIC RUNNER
    Publication number: 20200173557
    Abstract: A seal assembly is disclosed for sealing a high pressure fluid cavity from a low pressure fluid cavity. The cavities are at least partially disposed between a rotatable shaft and a sump housing. The seal assembly comprises a circumferential runner and a seal ring. The circumferential runner is carried by the shaft and has a radially outward facing seal surface extending axially along the shaft. The seal ring is sealing engaged with the sump housing and has a radially inward facing seal surface that sealingly engages the radially outward facing seal surface of the runner. The runner and the seal ring are formed from materials having coefficients of thermal expansion that are matched to effect sealing engagement between the runner and the seal ring over a predetermined range of operating temperatures.
    Type: Application
    Filed: November 30, 2018
    Publication date: June 4, 2020
    Applicant: Rolls-Royce Corporation
    Inventors: Daniel L. Fadgen, John Munson