Patents by Inventor James Alexander Haylock

James Alexander Haylock 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).

  • Patent number: 10837836
    Abstract: Infra-red sensors are often used in turbo molecular pumps to detect the temperature of the rotor or other mechanical parts and therefore indicate imminent, or potential, running failures. As deposits build up on either the infra-red sensor, or on the surface being monitored, the reading given by the sensor may not be a true representation of the actual surface temperature which can cause the pump controller to fail to stop the pump in time. The present invention provides a method and device for calibrating the sensor by creating a determined temperature rise in the sensor whilst keeping the rotor at ambient temperature. In particular the present invention uses the motor stator as the heater for causing the temperature increase.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: November 17, 2020
    Assignee: Edwards Limited
    Inventors: Brent Haslett, Andrew Grantham, James Alexander Haylock
  • Publication number: 20200347851
    Abstract: A turbomolecular pump and method and apparatus for controlling the pressure in a process chamber using such a pump is disclosed. The turbomolecular comprises: a rotor comprising a plurality of blades on a rotatable shaft; a control motor for driving the rotatable shaft; wherein the control motor is sized to output a power that is more than three times larger than a power required to drive the shaft at a constant velocity that is sufficiently high to provide an exhaust pressure of 5 millibars.
    Type: Application
    Filed: December 10, 2018
    Publication date: November 5, 2020
    Inventors: James Alexander HAYLOCK, Christopher Mark BAILEY, Nigel Paul SCHOFIELD
  • Publication number: 20200162004
    Abstract: A method of controlling an induction motor, an apparatus and a computer program product are disclosed. The method comprises: in response to an indication that a rotational frequency of the rotor is to be reduced from an initial operating frequency to a reduced operating frequency, applying an alternating braking voltage to the stator, the alternating braking voltage having a frequency selected to provide a slip of less than around ?1. In this way, the applied to alternating braking voltage generates a negative torque to slow the rotor while ensuring that a large proportion of the power generated by the motor is dissipated within the motor itself. This helps to reduce the amount of power required to be dissipated by any driving circuitry.
    Type: Application
    Filed: July 23, 2018
    Publication date: May 21, 2020
    Inventors: Jian Li, James Alexander Haylock
  • Patent number: 10514040
    Abstract: A vacuum system includes a vacuum pump and an electric motor for driving the vacuum pump. A cooling arrangement cools the vacuum system. A control performs at least one of decreasing voltage and increasing frequency of a signal applied to the electric motor to decrease an amount of magnetic flux generated in the electric motor instead of decreasing the current applied to the electric motor to arrive at a desired torque generated by the electric motor in response to pumping requirements of the vacuum pump.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: December 24, 2019
    Assignee: Edwards Limited
    Inventors: James Alexander Haylock, Richard Lee Harkin, Ian Keech, Jian Li
  • Publication number: 20190226914
    Abstract: Infra-red sensors are often used in turbo molecular pumps to detect the temperature of the rotor or other mechanical parts and therefore indicate imminent, or potential, running failures. As deposits build up on either the infra-red sensor, or on the surface being monitored, the reading given by the sensor may not be a true representation of the actual surface temperature which can cause the pump controller to fail to stop the pump in time. The present invention provides a method and device for calibrating the sensor by creating a determined temperature rise in the sensor whilst keeping the rotor at ambient temperature. In particular the present invention uses the motor stator as the heater for causing the temperature increase.
    Type: Application
    Filed: September 6, 2017
    Publication date: July 25, 2019
    Inventors: Brent Haslett, Andrew Grantham, James Alexander Haylock
  • Publication number: 20190162748
    Abstract: A pump assembly method and computer program are disclosed. The pump assembly comprises: a pump, an associated motor controller and an accelerometer mounted on the pump. The motor controller is configured to control power supplied to drive the pump and to receive data output from the accelerometer, the motor controller comprising processing circuitry configured to process the data received from the accelerometer to determine accelerations experienced at the pump due to the pump operation. These accelerations can be used to determine a condition of the pump.
    Type: Application
    Filed: May 16, 2017
    Publication date: May 30, 2019
    Inventors: James Alexander Haylock, Alexander James Patey, Michael Simmonds
  • Publication number: 20170218966
    Abstract: A vacuum pump with dynamic control of cooling fan speed and motor flux is provided to reduce transmitted noise and waste heat and provide a quieter, more efficient pump.
    Type: Application
    Filed: May 13, 2015
    Publication date: August 3, 2017
    Inventors: James Alexander HAYLOCK, Richard Lee HARKIN, Ian KEECH, Jian LI
  • Patent number: 8323006
    Abstract: Scroll-type pumping apparatus comprises a stator (104) comprising a fixed scroll member (106) having an end plate with a first spiral wrap (110) extending therefrom; an orbital scroll member (108) having an end plate with a second spiral wrap (112) extending therefrom to intermesh with the first spiral wrap; a plurality of flexible supports (118) each having one end connected to the orbital scroll member and another end connected to the stator to support the orbital scroll member relative to the stator, and a linear drive system (120) for driving the orbital scroll member to orbit relative to the fixed scroll member. The use of a linear drive system in combination with the flexible supports can provide apparatus having no rotational or rubbing parts.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: December 4, 2012
    Assignee: Edwards Limited
    Inventors: Nigel Paul Schofield, James Alexander Haylock
  • Publication number: 20090180909
    Abstract: Scroll-type pumping apparatus comprises a stator (104) comprising a fixed scroll member (106) having an end plate with a first spiral wrap (110) extending therefrom; an orbital scroll member (108) having an end plate with a second spiral wrap (112) extending therefrom to intermesh with the first spiral wrap; a plurality of flexible supports (118) each having one end connected to the orbital scroll member and another end connected to the stator to support the orbital scroll member relative to the stator, and a linear drive system (120) for driving the orbital scroll member to orbit relative to the fixed scroll member. The use of a linear drive system in combination with the flexible supports can provide apparatus having no rotational or rubbing parts.
    Type: Application
    Filed: November 21, 2006
    Publication date: July 16, 2009
    Inventors: Nigel Paul Schofield, James Alexander Haylock