Patents by Inventor Edward Litzow

Edward Litzow 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).

  • Patent number: 4154993
    Abstract: A drawout switchgear assembly which can be disconnected from a shielded cable electric distribution system under energized cable conditions. Each of the switchgear source and load bushings is held within a stationary cable connector with sufficient pressure exerted by the switchgear drawout operating mechanism to maintain a waterproof, fully shielded connection. Each stationary cable connector includes a current exchange bayonet member carrying a louvered band having resilient contact fingers which engage the movable switchgear bushing rod within a cavity of this rod for receiving the bayonet member. A switchgear drawout operating mechanism includes a mechanical interlock which allows withdrawal or reconnection of the switchgear only when the switchgear is in its open position.
    Type: Grant
    Filed: September 26, 1977
    Date of Patent: May 15, 1979
    Assignee: McGraw-Edison Company
    Inventors: David G. Kumbera, Edward Litzow