Patents by Inventor Frederic H. Tubbs

Frederic H. Tubbs 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).

  • Transfer case with overdrive/underdrive shifting
    Publication number: 20040220009
    Abstract: A transfer case for a vehicle that includes a planetary gear assembly, a clutch pack assembly, and a band and drum assembly that provide an overdrive or underdrive and direct drive in combination with a vehicle transmission. In one embodiment, an input shaft drives an outer ring gear of the planetary gear assembly and is coupled to one set of discs of the clutch assembly. A carrier of the planetary gear assembly is coupled to a rear output shaft, where the carrier supports a plurality of pinion gears. A sun gear of the planetary gear assembly is coupled to another set of discs of the clutch assembly that are coupled to the drum. When the clutch assembly is engaged, the ring gear is coupled to the sun gear for direct drive and when the band is engaged, the pinion gears and the ring gear provide underdrive.
    Type: Application
    Filed: February 5, 2004
    Publication date: November 4, 2004
    Applicant: BorgWarner Inc.
    Inventors: Andy Yu, Frederic H. Tubbs, Thomas J. Foster