Patents by Inventor Ewald Blaetz

Ewald Blaetz 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: 5795176
    Abstract: The present invention is an apparatus and method for providing a retrofitable cover on a preexisting plug which includes a lock on or quick release type connection. The retrofitable cover provides environment proof protection to an electrical connection between an extension cord and an electrical outlet box. The cover includes a hollow tubular housing and a hollow tubular end cap. As the end cap is tightened onto the hollow tubular housing, the housing contacts and compresses a bushing in the end cap to create a leak-free sealing of the interior of the housing. Another embodiment of the present invention is an extension cord which provides power to a plurality of receptacles which have the lock on and quick release connection feature.
    Type: Grant
    Filed: August 14, 1996
    Date of Patent: August 18, 1998
    Inventor: Ewald Blaetz
  • Patent number: 5299951
    Abstract: The invention is a housing assembly that is designed to be placed over the coupling area between two power/extension cords. The assembly includes a two-part central housing in which the two parts are joined together by a quick-release-type coupling that includes a gasket or "O"-ring. At each end of the housing are two threaded end caps. Located at least partially within each end cap is a compressible bushing. The bushings have a central thru-bore through which the power cord passes. As the end caps are tightened onto the housing, the housing contacts and compresses each of the bushings to create a leak-free sealing of the interior of the housing.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: April 5, 1994
    Inventor: Ewald Blaetz
  • Patent number: 4911654
    Abstract: An extension cord protection and locking device for securing and enclosing electrical connectors, and control connection and disconnection. A water resistant device is disclosed having a quick release, speed nut type connection. The outer surface of the device is configured with a taper at the ends for unrestricted movement during use.
    Type: Grant
    Filed: November 18, 1988
    Date of Patent: March 27, 1990
    Inventor: Ewald Blaetz