Patents by Inventor Frank H. Eidsvoog

Frank H. Eidsvoog 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).

  • Self-venting drain valve
    Patent number: 4611627
    Abstract: A self-venting drain valve is disclosed preferably used in connection with tapping accumulated water at the bottom of a fuel/water separator. A valve having a first portion (14) residing at the bottom of a vessel (10) has a main passage (34) and a secondary passage (26), the secondary passage being provided to allow air to enter the container to eliminate a vapor-lock. A second portion (16) of the valve is threaded on the first portion (14) and forms seals (52, 48, 44). When the second portion (16) is unscrewed, the seals are broken in sequence as follows: 48, 52, 44. Accumulated water as well as some fuel will then pass through the same outlet aperture (76) to a collection container held by the operator of the valve.
    Type: Grant
    Filed: February 7, 1985
    Date of Patent: September 16, 1986
    Assignee: Donaldson Company, Inc.
    Inventors: Frank H. Eidsvoog, Sean T. Warren