Patents Represented by Attorney Herbert B. Burkard

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  • Stress graded electrical bushing and method of making same
    Patent number: 4847450
    Abstract: A high voltage bushing is formed from a plurality of insulating layers. Conductive layers are interleaved with the insulating layers, and are electrically insulated from each other. The ends of the conductive layers are overlapped by stress grading layers, to minimize the electrical stress on the bushing.
    Type: Grant
    Filed: April 6, 1988
    Date of Patent: July 11, 1989
    Assignee: Raychem GmbH
    Inventor: Werner Rupprecht, deceased