Patents by Inventor Robert K. Hayden

Robert K. Hayden 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).

  • Method of opening metal beverage containers
    Patent number: 4330894
    Abstract: A finger or thumb worn thimble provided at one end thereof with a blade which can be used to puncture the end of a metal container and which is also provided with a cutting edge adjacent the aforesaid blade which can be used for cutting twine, rope, etc.
    Type: Grant
    Filed: January 7, 1980
    Date of Patent: May 25, 1982
    Inventor: Robert K. Hayden
  • Device and method for freeing frozen engine cylinders
    Patent number: 4273086
    Abstract: The subject invention constitutes an uncomplicated, inexpensive means of loosening "frozen" cylinders under certain conditions in an internal combustion engine, by applying pressure to the piston by forcing grease from a grease gun applied to a fitting in the engine spark plug or injector hole.
    Type: Grant
    Filed: June 12, 1979
    Date of Patent: June 16, 1981
    Inventor: Robert K. Hayden
  • High voltage safety-glow insulator
    Patent number: 4259545
    Abstract: The invention provides a relatively simple and inexpensive means of alerting electric power line maintenance crews and uninformed citizenry as to whether or not electric power lines, whether overhead or damaged and on the ground, are energized. This is done by combining with the conventional insulator which is used to support a power line conductor a glow lamp or fluorescent indicator which lights up when the conductor is energized.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: March 31, 1981
    Inventor: Robert K. Hayden