Patents by Inventor Raymond Francis Wilbur

Raymond Francis Wilbur 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).

  • Strain reliever for electric plug-socket connection
    Patent number: 3960432
    Abstract: A strain reliever for an electric appliance cord for preventing application of the force applied to electric cord from disengaging the plug at the end of the cord from a socket or a receptacle. An apertured body secured to the receptacle cover plate and a ball chain one end of which is engagable in the apertures. The opposite end of the ball chain has a cord clip for engaging an electrical cord so that when the plug at the end of the cord is engaged in the receptacle any strain on the cord will be taken up by the chain, rather than by the plug-socket engagement.
    Type: Grant
    Filed: July 2, 1975
    Date of Patent: June 1, 1976
    Inventor: Raymond Francis Wilbur