Patents by Inventor Donald K. Murrell

Donald K. Murrell 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).

  • Replacement thermocouple apparatus for a pilot burner
    Patent number: 3930892
    Abstract: Replacement thermocouple apparatus for attachment to a pilot gas burner. The adaptor and thermocouple mounting portion are yieldably restrained against relative axially sliding movement to enable initial slip-on positioning of the thermocouple relative to the pilot burner flame. The thermocouple body is slightly rotated with an up and down movement within the adaptor to obtain final positioning of the thermocouple tip relative to the burner flame.
    Type: Grant
    Filed: November 26, 1973
    Date of Patent: January 6, 1976
    Assignee: Robertshaw Controls Company
    Inventors: Donnell H. Fox, Donald K. Murrell