Patents by Inventor David T. McMillan

David T. McMillan 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).

  • Elliptical flow conditioning pipe elbow
    Patent number: 9476531
    Abstract: A pipe elbow for conditioning the flow of fluid through the elbow so that separate flow conditioners or a flow straightener need not be inserted between the elbow and a flow measurement device, comprising, a fluid carrying conduit elbow having first and second ends of circular cross section for connection to straight piping and having a bend intermediate the ends, wherein a lateral cross section of the conduit at the bend is elliptical in shape.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: October 25, 2016
    Assignee: Dieterich Standard, Inc.
    Inventor: David T. McMillan
  • Differential pressure measuring probe with bottoming indicator
    Patent number: 7561056
    Abstract: A bottoming indication system indicates contact between an inner wall of a fluid conducting conduit and a tip of a differential pressure measuring probe. The system includes a piezoelectric device and an indicator. The piezoelectric device is affixed to the tip of the differential pressure measuring probe so that pressure exerted on the piezoelectric device by contact between the piezoelectric device and the inner wall of the conduit produces a voltage difference across the piezoelectric device. The indicator is in electrical communication with the piezoelectric device so that a voltage difference across the piezoelectric device activates the indicator to indicate contact between the inner wall of the conduit and the tip of the differential pressure measuring probe.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: July 14, 2009
    Assignee: Dieterich Standard, Inc.
    Inventor: David T. McMillan
  • Elliptical Flow Conditioning Pipe Elbow
    Publication number: 20090026761
    Abstract: A pipe elbow for conditioning the flow of fluid through the elbow so that separate flow conditioners or a flow straightener need not be inserted between the elbow and a flow measurement device, comprising, a fluid carrying conduit elbow having first and second ends of circular cross section for connection to straight piping and having a bend intermediate the ends, wherein a lateral cross section of the conduit at the bend is elliptical in shape.
    Type: Application
    Filed: July 27, 2007
    Publication date: January 29, 2009
    Inventor: David T. McMillan
  • Differential Pressure Measuring Probe With Bottoming Indicator
    Publication number: 20080238697
    Abstract: A bottoming indication system indicates contact between an inner wall of a fluid conducting conduit and a tip of a differential pressure measuring probe. The system includes a piezoelectric device and an indicator. The piezoelectric device is affixed to the tip of the differential pressure measuring probe so that pressure exerted on the piezoelectric device by contact between the piezoelectric device and the inner wall of the conduit produces a voltage difference across the piezoelectric device. The indicator is in electrical communication with the piezoelectric device so that a voltage difference across the piezoelectric device activates the indicator to indicate contact between the inner wall of the conduit and the tip of the differential pressure measuring probe.
    Type: Application
    Filed: March 27, 2007
    Publication date: October 2, 2008
    Inventor: David T. McMillan