Patents by Inventor David W. Mather

David W. Mather 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: 6119729
    Abstract: The present invention provides a fluid handling apparatus for use in cold temperature conditions. In this respect, the apparatus of the present invention comprises a freeze protected conduit having a length comprising an elongated conduit for conveying or containing an aqueous liquid and an elongated compressible elastomeric material disposed within the conduit along its length. Alternatively, the conduit may comprise, at least in part, a substantially liquid impermeable membrane which is disposed in substantially adjacent relationship with a compressible elastomeric material. When exposed to freezing temperatures, aqueous liquid in conduits will freeze and expand. The compressible elastomeric material accommodates this expansion, thereby protecting the conduit from failure.
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: September 19, 2000
    Assignee: Arise Technologies Corporation
    Inventors: Johannes-Ulrich Oberholzer, David Elzinga, Ian MacLellan, David W. Mather