Patents by Inventor David B. Chamberlain

David B. Chamberlain 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).

  • Butterfly valve and system employing same and method for using same field
    Patent number: 8763987
    Abstract: A butterfly valve comprises: a body including a valve opening; and a flapper rotatably mounted about a rotation axis so as to be movable relative to the valve opening. The flapper is rotatable at least 180° about the rotation axis so that the flapper is movable to at least one fully opened position, at least one fully closed position 90° apart from the fully opened position, and a third position, either fully opened or fully closed, 180° from the other like position. In one embodiment the flapper is rotatable at least 360° about the rotation axis so that the flapper is movable to each of two opened positions 180° apart, and two closed positions 180° apart from each other and 90° and 270° apart from each of the fully opened positions. The valve can be easily calibrated and controlled, and cleaned to extend the useful service life between cleanings.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: July 1, 2014
    Assignee: MKS Instruments, Inc.
    Inventors: Jaroslaw W. Pisera, David B. Chamberlain, Robert Krmpotich, Paul D. Lucas
  • BUTTERFLY VALVE AND SYSTEM EMPLOYING SAME AND METHOD FOR USING SAME FIELD
    Publication number: 20110101259
    Abstract: A butterfly valve comprises: a body including a valve opening; and a flapper rotatably mounted about a rotation axis so as to be movable relative to the valve opening. The flapper is rotatable at least 180° about the rotation axis so that the flapper is movable to at least one fully opened position, at least one fully closed position 90° apart from the fully opened position, and a third position, either fully opened or fully closed, 180° from the other like position. In one embodiment the flapper is rotatable at least 360° about the rotation axis so that the flapper is movable to each of two opened positions 180° apart, and two closed positions 180° apart from each other and 90° and 270° apart from each of the fully opened positions. The valve can be easily calibrated and controlled, and cleaned to extend the useful service life between cleanings.
    Type: Application
    Filed: November 3, 2009
    Publication date: May 5, 2011
    Inventors: Jaroslaw W. Pisera, David B. Chamberlain, Robert Krmpotich, Paul D. Lucas