Patents by Inventor John I. Roberts

John I. Roberts 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: 4456024
    Abstract: This invention is a freeze protection valve assembly for preventing the freezing of water in pipes of residential and the like water systems. The valve is positioned in a reservoir containing water of the water system. If the water temperature falls below a predetermined minimum, the valve opens discharging water from the system at the same time bringing into the system the warmer waters from the underground supply. Since the valve is activated by the temperature of the water itself, water waste is minimized.
    Type: Grant
    Filed: January 17, 1983
    Date of Patent: June 26, 1984
    Inventor: John I. Roberts