Patents by Inventor John J. Duzich

John J. Duzich 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).

  • Accumulator condition indicator with spring biasing to indicate linear displacement of a piston
    Patent number: 4355280
    Abstract: An accumulator fluid indicator useful to measure the linear displacement of a piston without the use of a dynamic seal. A Hall Effect sensor mounted on the outer surface of the accumulator is used to sense the piston location while isolated from the fluid flow. Temperature and pressure sensors may be used to supplement the accuracy of the position indicator by compensating for errors due to changes in temperature or pressure applied to the pressurant.
    Type: Grant
    Filed: May 13, 1980
    Date of Patent: October 19, 1982
    Assignee: Grumman Aerospace Corporation
    Inventor: John J. Duzich
  • Aircraft onboard operational status indicator
    Patent number: 4115754
    Abstract: An indicator panel on the exterior of an airplane having indicators operatively connected to systems and components with switches interposed to provide on call to an observer outside of the airplane the ability to function of the indicators in checking the airplane's previous inflight and post flight operational status of such systems and components of the vehicle with the indicators being grouped on the panel as to the various systems and components.
    Type: Grant
    Filed: December 22, 1976
    Date of Patent: September 19, 1978
    Assignee: Grumman Aerospace Corporation
    Inventor: John J. Duzich