Patents by Inventor Matthew Key

Matthew Key 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).

  • Ionisation vacuum gauges and gauge heads
    Patent number: 8456167
    Abstract: A gauge head (10) for an ionisation vacuum gauge includes an electrical device (12, 28, 54) operable to provide an electrical discharge in a gas whose pressure is to be measured to initiate ion discharge in the gas.
    Type: Grant
    Filed: October 7, 2008
    Date of Patent: June 4, 2013
    Assignee: Edwards Limited
    Inventor: Matthew Key
  • IONISATION VACUUM GAUGES AND GAUGE HEADS
    Publication number: 20110101988
    Abstract: A gauge head (10) for an ionisation vacuum gauge includes an electrical device (12, 28, 54) operable to provide an electrical discharge in a gas whose pressure is to be measured to initiate ion discharge in the gas.
    Type: Application
    Filed: October 7, 2008
    Publication date: May 5, 2011
    Inventor: Matthew Key
  • Vacuum gauge
    Patent number: 7165458
    Abstract: A thermal conductivity type pressure gauge comprises a gauge head (2) being rotatably mountable in a vessel whose environmental pressure is to be measured and an elongate electrical filament (6) mounted in the gauge head, the gauge head (2) having an inlet where through the electrical filament is exposed to the environmental pressure within the vessel and the filament (6) having directional component lengths in two orthogonal axes, one of the orthogonal axes X—X being parallel to the axis of rotation of the gauge head (2).
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: January 23, 2007
    Assignee: The BOC Group plc
    Inventors: Kenneth George Packer, Matthew Key
  • Vacuum gauge
    Publication number: 20060086189
    Abstract: A thermal conductivity type pressure gauge comprises a gauge head (2) being rotatably mountable in a vessel whose environmental pressure is to be measured and an elongate electrical filament (6) mounted in the gauge head, the gauge head (2) having an inlet where through the electrical filament is exposed to the environmental pressure within the vessel and the filament (6) having directional component lengths in two orthogonal axes, one of the orthogonal axes X-X being parallel to the axis of rotation of the gauge head (2).
    Type: Application
    Filed: June 6, 2003
    Publication date: April 27, 2006
    Inventors: Kenneth Packer, Matthew Key
  • Pumping apparatus
    Publication number: 20050123414
    Abstract: A conduit supplies a flow of gas to a sealed chamber surrounding the swept volume of a pump. The conduit comprises a flow impedance for limiting the rate of flow of the gas to the sealed chamber. Signals output from pressure transducers provided on either side of the flow impedance are used to detect leakage of gas from the sealed chamber into the pump swept volume, thus indicating the state of the seal surrounding the swept volume.
    Type: Application
    Filed: December 3, 2004
    Publication date: June 9, 2005
    Inventors: Matthew Key, Nicholas Hutton, Frederick Underwood, Phillip North