Patents by Inventor David Hadfield

David Hadfield 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).

  • Publication number: 20140151274
    Abstract: A wear detector comprising, a pressure vessel, a hydrocyclone, within the pressure vessel, a vibration or strain sensor, coupled to the hydrocyclone, for producing a data signal representative of a physical parameter of the hydrocyclone, means for transmitting the data signal out of the pressure vessel, and data analysing means, for collecting and analysing the data signal.
    Type: Application
    Filed: December 19, 2011
    Publication date: June 5, 2014
    Applicant: M-I DRILLING FLUIDS UK LIMITED
    Inventors: David Hadfield, Ian Charles Smyth
  • Patent number: 8728327
    Abstract: A method and apparatus are provided for the controlled application of ultrasonic energy for conditioning of mixtures of gas and liquids by evolving and/or agglomerating gas bubbles existing with or in a liquid or for coalescing droplets of liquid dispersed in another liquid. The invention in preferred embodiments thereof comprises a coalescing apparatus for increasing the droplet size of a mixture formed as a liquid dispersed in another liquid, and a de-gassing apparatus arranged to evolve and/or agglomerate gaseous bubbles in a gas/liquid mixture. In the apparatuses, ultrasonic transducers are used to impart vibrational energy to the mixtures.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: May 20, 2014
    Assignee: Cyclotech Limited
    Inventors: David Hadfield, Alastair Sinker, Ian Charles Smyth
  • Publication number: 20100264095
    Abstract: A method and apparatus are provided for the controlled application of ultrasonic energy for conditioning of mixtures of gas and liquids by evolving and/or agglomerating gas bubbles existing with or in a liquid or for coalescing droplets of liquid dispersed in another liquid. The invention in preferred embodiments thereof comprises a coalescing apparatus for increasing the droplet size of a mixture formed as a liquid dispersed in another liquid, and a de-gassing apparatus arranged to evolve and/or agglomerate gaseous bubbles in a gas/liquid mixture. In the apparatuses, ultrasonic transducers are used to impart vibrational energy to the mixtures.
    Type: Application
    Filed: June 30, 2010
    Publication date: October 21, 2010
    Inventors: David HADFIELD, Alastair SINKER, Ian Charles SMYTH
  • Patent number: 7766121
    Abstract: A method and apparatus are provided for the controlled application of ultrasonic energy for conditioning of mixtures of gas and liquids by evolving and/or agglomerating gas bubbles existing with or in a liquid or for coalescing droplets of liquid dispersed in another liquid. The invention in preferred embodiments thereof comprises a coalescing apparatus for increasing the droplet size of a mixture formed as a liquid dispersed in another liquid, and a de-gassing apparatus arranged to evolve and/or agglomerate gaseous bubbles in a gas/liquid mixture. In the apparatuses, ultrasonic transducers are used to impart vibrational energy to the mixtures.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: August 3, 2010
    Assignee: Cyclotech Limited
    Inventors: David Hadfield, Alastair Sinker, Ian Charles Smyth
  • Patent number: 7401704
    Abstract: A conveyor apparatus for conveying solid material in a process vessel includes, a first baffle set comprising a plurality of inclined baffles located above the eductors and arranged to restrict upward flow of solids in the direction of movement of the solids. A second baffle set may be used to prevent particles rebounding from an end wall and back into upper levels of the vessel.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: July 22, 2008
    Assignee: Cyclotech Limited
    Inventors: David Hadfield, Michael Hess, Alastair Sinker, Ian Smyth, Pete Thompson
  • Publication number: 20070138108
    Abstract: A method and apparatus are provided for the controlled application of ultrasonic energy for conditioning of mixtures of gas and liquids by evolving and/or agglomerating gas bubbles existing with or in a liquid or for coalescing droplets of liquid dispersed in another liquid. The invention in preferred embodiments thereof comprises a coalescing apparatus for Increasing the droplet size of a mixture formed as a liquid dispersed in another liquid, and a de-gassing apparatus arranged to evolve and/or agglomerate gaseous bubbles in a gas/liquid mixture. In the apparatuses, ultrasonic transducers are used to impart vibrational energy to the mixtures.
    Type: Application
    Filed: December 20, 2005
    Publication date: June 21, 2007
    Inventors: David Hadfield, Alastair Sinker, Ian Smyth
  • Publication number: 20060006126
    Abstract: A conveyor apparatus for conveying solid material in a process vessel includes, a first baffle set comprising a plurality of inclined baffles located above the eductors and arranged to restrict upward flow of solids in the direction of movement of the solids. A second baffle set may be used to prevent particles rebounding from the end wall and back into upper levels of the vessel.
    Type: Application
    Filed: July 8, 2005
    Publication date: January 12, 2006
    Inventors: David Hadfield, Michael Hess, Alastair Sinker, Ian Smyth, Pete Thompson
  • Patent number: D252156
    Type: Grant
    Filed: March 15, 1976
    Date of Patent: June 19, 1979
    Assignee: Lucas Industries Limited
    Inventors: Roy A. Tabony, David Hadfield