Patents by Inventor David W. Darr

David W. Darr 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: 5140216
    Abstract: An explosion proof light comprising a shatter-resistant, fluid tight, light transmissive case and a fluid tight light source sealed within the case in at least partial spaced-apart relation thereto. An effective quantity of electrically non-conductive fluid extinguishant such as Halon 2402 is sealed within the space between the case and the light source under positive pressure for suppressing sparks resulting from damage to the light causing penetration to the light source and exposure of sparks and intense heat to the environment. An outer housing may preferably be positioned over the case to add further protection.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: August 18, 1992
    Inventor: David W. Darr