Patents by Inventor Tom Chrisfield

Tom Chrisfield 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: 5682750
    Abstract: A portable self-contained delivery station for liquid natural gas (LNG) is provided on a movable skid frame and equipped with an instant -on delivery system which may initiate LNG delivery immediately to a use vehicle. The skid is equipped with a spill containment feature such that the LNG may be contained in the event of spillage. A variable speed pump both controls LNG dispensing and saturation levels of the stored LNG. The pump is submerged in a sump tank which is separate from the bulk storage tank. The sump tank is flooded with an amount of LNG such that the pump is submerged. Delivery of LNG may thus occur instantly, without pre-cooling of the pump or associated meter.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: November 4, 1997
    Assignee: MVE Inc.
    Inventors: Duane Preston, Michael Lutgen, Tom Drube, Paul Drube, Tom Chrisfield