Patents by Inventor Heidi J. Stegemiller

Heidi J. Stegemiller 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).

  • System and method for controlling deformation of a structure having a phase shift detector
    Patent number: 5338928
    Abstract: Vibrations within ceramic matrix and metal matrix composite materials are controlled by applying an excitation voltage to an array of piezoelectric actuators mounted to the surface of such materials. The actuators are driven in response to the phase shift of monochromatic light transmitted through a grid of optical fibers embedded within the composite materials. Applications include active vibration suppression, de-icing, and on-line structural integrity monitoring.
    Type: Grant
    Filed: April 28, 1993
    Date of Patent: August 16, 1994
    Assignee: General Electric Company
    Inventors: James R. Jamieson, Ahmad P. Zahedi, Heidi J. Stegemiller
  • Titanium MMC fanshaft with superalloy end attachment
    Patent number: 5277661
    Abstract: A first hollow titanium MMC driveshaft portion is diffusion bonded to a third portion which in turn is fastened to a second superalloy portion via circumferentially positioned pins which are tightly fitted within aligned holed formed in the second and third driveshaft portions. The first, second and third portions are concentric with respect to the driveshaft centerline, and the pins are retained by means of a concentric retaining cylinder.
    Type: Grant
    Filed: February 27, 1992
    Date of Patent: January 11, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Stephen W. Mak, Heidi J. Stegemiller