Patents by Inventor Keith Kohnen

Keith Kohnen 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: 3963381
    Abstract: This invention relates to an improvement in an apparatus suited for removing liquid e.g., flammable from a bulk container comprising pumping equipment in the container, a fluid transmitting casing extending from an upper portion in the container to a lower portion and communicating with the pumping equipment, an inlet communicating with the pumping equipment, a fluid outlet at the upper part of the container communicating with the casing, a foot valve for sealing the inlet from the container when in a closed position and permitting fluid flow from the container through the inlet to said casing when in the open position, said foot valve including means responsive to lifting movement of the pumping equipment for closing said valve and a sealing gland at the top of the casing accommodating movement of the pumping equipment for permitting opening and closing of the foot valve without venting the casing.
    Type: Grant
    Filed: May 21, 1975
    Date of Patent: June 15, 1976
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Keith Kohnen