Patents by Inventor David P. Luckenbach

David P. Luckenbach 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).

  • Rotable shaft having electrical connection therethrough
    Patent number: 4168872
    Abstract: A hollow rotatable shaft supported by bearing means surrounds a rivet extending through both ends thereof and rotatable therewith. A non-rotatable contact is connected to a terminal adjacent one end of the shaft and in brushing contact with one end of the rivet. A mechanical coupling is located at the opposite end of the shaft whereby the shaft, rivet and coupling are rotatable as a single unit and electrical current may pass through the rivet as the unit is rotating.
    Type: Grant
    Filed: July 21, 1978
    Date of Patent: September 25, 1979
    Assignee: McGraw-Edison Company
    Inventor: David P. Luckenbach