Patents by Inventor Johan A. Friedericy

Johan A. Friedericy 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).

  • Layered flywheel with stress reducing construction
    Patent number: 4481840
    Abstract: A flywheel having elastic spokes carrying an elastic rim; and a hub coupling the spokes to a shaft and deforming in response to centrifugal force to match the radial distortion of the spokes.
    Type: Grant
    Filed: December 2, 1981
    Date of Patent: November 13, 1984
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Johan A. Friedericy, Dennis A. Towgood
  • Composite material flywheel hub
    Patent number: 4458400
    Abstract: Unidirectional fiber-reinforced matrix material bars are stacked to form a lightweight, high strength hub for a composite material flywheel.
    Type: Grant
    Filed: April 13, 1981
    Date of Patent: July 10, 1984
    Assignee: The Garrett Corporation
    Inventors: Johan A. Friedericy, Dennis A. Towgood
  • Composite material flywheel hub
    Patent number: 4286475
    Abstract: Unidirectional fiber-reinforced matrix material bars are stacked to form a lightweight, high strength hub for a composite material flywheel.
    Type: Grant
    Filed: September 26, 1979
    Date of Patent: September 1, 1981
    Assignee: The Garrett Corporation
    Inventors: Johan A. Friedericy, Dennis A. Towgood
  • Heat exchanger construction
    Patent number: 4253520
    Abstract: A plate-fin heat exchanger construction including peripheral channels each receiving a mass for protecting the plates against stress failure.
    Type: Grant
    Filed: October 26, 1978
    Date of Patent: March 3, 1981
    Assignee: The Garrett Corporation
    Inventors: Johan A. Friedericy, Gary F. Mueller, James R. Lohay
  • Multi-rim flywheel attachment
    Patent number: 4186623
    Abstract: Spacers are positioned between adjacent rims of a multi-rim composite flywheel in alignment with hub spokes thereof to improve flywheel performance while minimizing radial stress.
    Type: Grant
    Filed: April 3, 1978
    Date of Patent: February 5, 1980
    Assignee: The Garrett Corporation
    Inventors: Johan A. Friedericy, Dale O. Moeller, Dennis A. Towgood
  • Multi-rim flywheel
    Patent number: 4036080
    Abstract: A plurality of nested rims are mounted on spokes of a flywheel hub member in a manner causing the rim assembly to have a noncircular configuration while the flywheel is at rest. Expansion of the rim assembly and the hub member during high speed flywheel operation causes the rim assembly to assume a substantially circular configuration with each rim frictionally engaging its adjacent rims while the inner rim is frictionally engaged by the spokes.
    Type: Grant
    Filed: November 29, 1974
    Date of Patent: July 19, 1977
    Assignee: The Garrett Corporation
    Inventors: Johan A. Friedericy, Dennis A. Towgood