Patents by Inventor Theodore L. Bertchie

Theodore L. Bertchie 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).

  • Balance bar having a reduced axial thermal stress resulting from high temperature manufacturing methods
    Patent number: 6598489
    Abstract: A manufacturing process that prevents stress between a titanium flow tube and a surrounding steel balance bar due to a brazing operation. A straight tube Coriolis flowmeter having a titanium flow tube is surrounded by a balance bar having separate longitudinal halves. The balance bar halves are connected to each other by an elongated side channel on each side of the balance bar halves. The elongated side channels are radially spaced apart from the balance bar halves but connected to the balance bar halves by means of tubular pegs which extend into holes in the side channels. The flow tube is joined by brazing via connecting rings to the balance bar halves and to an inner end of the pegs. The radially outer end of the pegs are inserted into the holes in the side channels and welded. Circular welds and slots in the side channels reduce axial shrinkage of the side channels as the welds cool. This prevents axial stress on the flow tube.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: July 29, 2003
    Assignee: Micro Motion, Inc.
    Inventors: Craig Brainerd Van Cleve, Theodore L. Bertchie