Patents by Inventor Charles E. Porter, Jr.

Charles E. Porter, Jr. 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).

  • Method and apparatus for testing the fluid-tight sealed integrity of a hermetically-sealed package in a rapidly-stabilized environment
    Patent number: 4715215
    Abstract: A leak detector is adapted to test the fluid-tight sealed integrity of a hermetically-sealed package having a movable wall portion. An enclosure surrounds a package-to-be-tested, and the space within the enclosure is evacuated by a vacuum pump. As the pressure acting on the outer surface of the package begins to fall,the gas within the package will be expand, pushing the movable wall portion outwardly. Such displacement of the movable wall portion is sensed and compared with a predetermined value. If desired, the reduced pressure within the enclosure may be held constant for as time interval, and the sensor used to determine whether the distended wall portion has relaxed.
    Type: Grant
    Filed: October 2, 1986
    Date of Patent: December 29, 1987
    Assignee: The Aro Corporation
    Inventors: John M. Perhach, Charles E. Porter, Jr., David C. Maloney