Patents by Inventor Donald L. Curwick

Donald L. Curwick 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).

  • Hot air welding torch with concentric tubular members providing cooling air flow
    Patent number: 5909535
    Abstract: A hot air torch for the welding of plastic featuring an air flow around and about the inner portions of tubular members which entrains unwanted internally generated heat prior to the welding tip to provide a torch body which is safe to the touch while at the same time providing suitably heated air at the welding tip. Excess accumulated heat is vented overboard in the vicinity of the welding tip.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: June 1, 1999
    Assignee: Seelye Acquisition, Inc.
    Inventors: Donald L. Curwick, Dominick P. DiChiria