Patents by Inventor Ahmad P. Zahedi

Ahmad P. Zahedi 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).

  • Reusable hard tooling for article consolidation and consolidation method
    Patent number: 6202277
    Abstract: Hard tooling for consolidation of a workpiece there between is preserved for reuse by disposing between the tooling and a workpiece a plurality of distinct, superimposed sacrificial sheets, for example metal foils, to isolate the workpiece from the tooling. The sacrificial sheets are substantially non-adherent one to another; and a sheet in contact with a workpiece surface is substantially chemically non-reactive with such workpiece surface.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: March 20, 2001
    Assignee: General Electric Company
    Inventors: Ahmad P. Zahedi, Nicholas Damlis, Paul A. Siemers
  • Stiffened composite structures and method of making thereof
    Patent number: 5771680
    Abstract: A stiffened composite is provided exhibiting multi-directional reinforcement with continuous long fibers. The composite has a substrate and serpentine stiffeners adhered thereto. The stiffeners merge toward, join with and diverge from adjacent stiffeners to provide a stiffener matrix on the substrate. The serpentine stiffener permit the matrix to exhibit multi-directional reinforcement with the continuous long fibers within the serpentine ribs. The composite structures are useful as aircraft bypass ducts, and as other composite products.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: June 30, 1998
    Assignee: General Electric Company
    Inventors: Ahmad P. Zahedi, Stephen C. Mitchell
  • 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