Patents by Inventor Rudolf Kofmel

Rudolf Kofmel 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: 4070556
    Abstract: An electrical plug and socket connection which has an axially symmetrical plug body, a central aperture in the plug body for receiving a multi-conductor electrical cable and a cylindrical extension secured to the plug body in alignment with the axis thereof which defines a stop surface at the end thereof remote from the plug body. At least one contact ring is disposed coaxially with the extension between the plug body and the stop surface. The contact ring has an exposed outer surface. At least one contact element defined by a radially movable stud secured to one end of a flat spring projects partially into a cavity of the socket portion for cooperation with the contact ring.
    Type: Grant
    Filed: September 22, 1976
    Date of Patent: January 24, 1978
    Inventor: Rudolf Kofmel