Patents by Inventor Arjan Stehouwer

Arjan Stehouwer 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).

  • Device and method for measuring a flow characteristic of a fluid in a conduit
    Patent number: 8146442
    Abstract: A device for determining a flow characteristic, in particular flow velocity, of a fluid in a conduit, comprises a conduit body (110), at least four pairs of ultrasonic transducers (116, 118; 122, 124; 128, 130; 132, 1340 defining swirl sensitive acoustic paths (128, 130; 132, 134). The ultrasonic transducers are arranged such that they define paired acoustic paths. The device also comprises means (142, 144) for measuring the transit times of transmitted ultrasonic waves and for determining a flow characteristic from the measured transit times.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: April 3, 2012
    Assignee: Elster NV/SA
    Inventor: Arjan Stehouwer
  • DEVICE AND METHOD FOR MEASURING A FLOW CHARACTERISTIC OF A FLUID IN A CONDUIT
    Publication number: 20110016985
    Abstract: A device for determining a flow characteristic, in particular flow velocity, of a fluid in a conduit, comprises a conduit body (110), at least four pairs of ultrasonic transducers (116, 118; 122, 124; 128, 130; 132, 1340 defining swirl sensitive acoustic paths (128, 130; 132, 134). The ultrasonic transducers are arranged such that they define paired acoustic paths. The device also comprises means (142, 144) for measuring the transit times of transmitted ultrasonic waves and for determining a flow characteristic from the measured transit times.
    Type: Application
    Filed: July 24, 2009
    Publication date: January 27, 2011
    Applicant: Elster NV/SA
    Inventor: Arjan STEHOUWER
  • Device and method for determining a flow characteristic of a fluid in a conduit
    Patent number: 7845240
    Abstract: A device for determining a flow characteristic of a fluid in a conduit comprises a conduit body (10), a first pair of first ultrasonic transducers (16, 18) defining a first swirl sensitive acoustic path (20) and a second pair of second ultrasonic transducers (24, 26) defining a second swirl sensitive acoustic path (28), a third pair of third ultrasonic transducers (30, 32) and a fourth pair of fourth ultrasonic transducers (36, 38) the transducers (30, 32) of the third pair being positioned diametrically opposite to each other at the wall (14) of the conduit body (10) such that the third transducers (30, 32) define a third acoustic path (34) having a single reflection against the inner (12) wall of the conduit body (10) and the transducers (36, 38) of the fourth pair being positioned diametrically opposite to each other such that the fourth transducers (36, 38) define a fourth acoustic path (40), wherein the transducers (16, 18; 24, 26; 30, 32; 36, 38) are capable of acting individually as a transmitter and r
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: December 7, 2010
    Assignee: Elster NV/SA
    Inventor: Arjan Stehouwer