Patents by Inventor John W. Sunderland

John W. Sunderland 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).

  • Compression boiler drain
    Patent number: 5169122
    Abstract: A compression boiler drain is provided which is integrally form with a plumbing fitting having inwardly tapered external threads and an outwardly tapered bore. This construction permits the user to choose which ever of two methods he/she decides is more desirable when installing the associated plumbing fitting that is: 1) using an appropriate sized compression ferrule and compression nut to connect to tubing; or 2) alternatively using an ordinary thread conventional plumbing coupling to connect to threaded pipe.
    Type: Grant
    Filed: December 2, 1991
    Date of Patent: December 8, 1992
    Inventor: John W. Sunderland