Patents by Inventor Kayvan Hedayat

Kayvan Hedayat 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: 20200408659
    Abstract: A soot sensing system includes a soot sensor having a first element, and circuitry to an amount of soot accumulated on the element and to control heating of the element in response to the soot accumulation. An electrostatic repelling voltage (ERV) may be applied to a sensor/heater element(s) during a contamination prevention mode (CPM) to repel ash and reduce contamination of the sensor. A pulsed heating voltage (PHV) may be applied to the elements during the CPM and a pulsed ERV may be applied to the elements during the “off” period of the PHV. All voltage to the elements may be turned off during the CPM and the elements may be floating/ground. A PHV may be applied to the elements during the CPM and no voltage may be applied to the elements during the “off” period of the PHV. A heating voltage may be applied to the elements during a CPM corresponding to a cold start.
    Type: Application
    Filed: January 30, 2020
    Publication date: December 31, 2020
    Inventors: Kayvan Hedayat, John Hart, Eric Matson, Mark Wilson, Norman Poirier
  • Patent number: 10591398
    Abstract: A soot sensing system includes a soot sensor having a first element, and circuitry to an amount of soot accumulated on the element and to control heating of the element in response to the soot accumulation. An electrostatic repelling voltage (ERV) may be applied to a sensor/heater element(s) during a contamination prevention mode (CPM) to repel ash and reduce contamination of the sensor. A pulsed heating voltage (PHV) may be applied to the elements during the CPM and a pulsed ERV may be applied to the elements during the “off” period of the PHV. All voltage to the elements may be turned off during the CPM and the elements may be floating/ground. A PHV may be applied to the elements during the CPM and no voltage may be applied to the elements during the “off” period of the PHV. A heating voltage may be applied to the elements during a CPM corresponding to a cold start.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: March 17, 2020
    Assignee: Stoneridge, Inc.
    Inventors: Kayvan Hedayat, John Hart, Eric Matson, Mark Wilson, Norman Poirier
  • Publication number: 20200018680
    Abstract: A soot sensor includes a soot sensor including a first element on a first surface of the soot sensor. A soot sensing system may include a soot sensor and circuitry electrically coupled to the first element of the soot sensor. The circuitry is configured to determine an amount of soot accumulated on the first element and to control heating of the first element in response to the soot accumulation.
    Type: Application
    Filed: August 6, 2019
    Publication date: January 16, 2020
    Inventors: Kayvan Hedayat, John Hart, Eric Matson, Mark Wilson, Norman Poirier
  • Patent number: 10416062
    Abstract: A soot sensor includes a soot sensor including a first element on a first surface of the soot sensor. A soot sensing system may include a soot sensor and circuitry electrically coupled to the first element of the soot sensor. The circuitry is configured to determine an amount of soot accumulated on the first element and to control heating of the first element in response to the soot accumulation.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: September 17, 2019
    Assignee: Stoneridge, Inc.
    Inventors: Kayvan Hedayat, John Hart, Eric Matson, Mark Wilson, Norman Poirier
  • Patent number: 10006815
    Abstract: A thermocouple including first and second thermoelements arranged to define a hot junction and a cold junction. A thermometer is coupled to at least one of the first and second thermoelements to measure the temperature of said cold junction independent of electronics used for conditioning a signal of said thermocouple. The thermoelements may be thick film elements coupled to a substrate. The thermometer may also be coupled to the substrate.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: June 26, 2018
    Assignee: STONERIDGE CONTROL DEVICES, INC.
    Inventor: Kayvan Hedayat
  • Publication number: 20180113062
    Abstract: A soot sensing system includes a soot sensor having a first element, and circuitry to an amount of soot accumulated on the element and to control heating of the element in response to the soot accumulation. An electrostatic repelling voltage (ERV) may be applied to a sensor/heater element(s) during a contamination prevention mode (CPM) to repel ash and reduce contamination of the sensor. A pulsed heating voltage (PHV) may be applied to the elements during the CPM and a pulsed ERV may be applied to the elements during the “off” period of the PHV. All voltage to the elements may be turned off during the CPM and the elements may be floating/ground. A PHV may be applied to the elements during the CPM and no voltage may be applied to the elements during the “off” period of the PHV. A heating voltage may be applied to the elements during a CPM corresponding to a cold start.
    Type: Application
    Filed: June 30, 2017
    Publication date: April 26, 2018
    Inventors: Kayvan Hedayat, John Hart, Eric Matson, Mark Wilson, Norman Poirier
  • Patent number: 9696249
    Abstract: A soot sensing system includes a soot sensor having a first element, and circuitry to an amount of soot accumulated on the element and to control heating of the element in response to the soot accumulation. An electrostatic repelling voltage (ERV) may be applied to a sensor/heater element(s) during a contamination prevention mode (CPM) to repel ash and reduce contamination of the sensor. A pulsed heating voltage (PHV) may be applied to the elements during the CPM and a pulsed ERV may be applied to the elements during the “off” period of the PHV. All voltage to the elements may be turned off during the CPM and the elements may be floating/ground. A PHV may be applied to the elements during the CPM and no voltage may be applied to the elements during the “off” period of the PHV. A heating voltage may be applied to the elements during a CPM corresponding to a cold start.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: July 4, 2017
    Assignee: Stoneridge, Inc.
    Inventors: Kayvan Hedayat, John Hart, Eric Matson, Mark Wilson, Norman Poirier
  • Publication number: 20170023461
    Abstract: A soot sensor includes a soot sensor including a first element on a first surface of the soot sensor. A soot sensing system may include a soot sensor and circuitry electrically coupled to the first element of the soot sensor. The circuitry is configured to determine an amount of soot accumulated on the first element and to control heating of the first element in response to the soot accumulation.
    Type: Application
    Filed: June 30, 2016
    Publication date: January 26, 2017
    Inventors: Kayvan Hedayat, John Hart, Eric Matson, Mark Wilson, Norman Poirier
  • Patent number: 9389163
    Abstract: A soot sensor includes a soot sensor including a first element on a first surface of the soot sensor. A soot sensing system may include a soot sensor and circuitry electrically coupled to the first element of the soot sensor. The circuitry is configured to determine an amount of soot accumulated on the first element and to control heating of the first element in response to the soot accumulation.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: July 12, 2016
    Assignee: Stoneridge, Inc.
    Inventors: Kayvan Hedayat, John Hart, Eric Matson, Mark Wilson, Norman Poirier
  • Patent number: 9134216
    Abstract: A soot sensor includes a soot sensor including a sensor element and heater element disposed on a first surface of the soot sensor. A soot sensing system may include a soot sensor and circuitry electrically coupled to the sensor and heater elements of the soot sensor. The circuitry is configured to determine an amount of soot accumulated on the soot sensor and to control heating of the heater element in response to the soot accumulation.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: September 15, 2015
    Assignee: Stoneridge, Inc.
    Inventors: Kayvan Hedayat, John Hart, Eric Matson, Mark Wilson, Norman Poirier
  • Publication number: 20150168285
    Abstract: A soot sensing system includes a soot sensor having a first element, and circuitry to an amount of soot accumulated on the element and to control heating of the element in response to the soot accumulation. An electrostatic repelling voltage (ERV) may be applied to a sensor/heater element(s) during a contamination prevention mode (CPM) to repel ash and reduce contamination of the sensor. A pulsed heating voltage (PHV) may be applied to the elements during the CPM and a pulsed ERV may be applied to the elements during the “off” period of the PHV. All voltage to the elements may be turned off during the CPM and the elements may be floating/ground. A PHV may be applied to the elements during the CPM and no voltage may be applied to the elements during the “off” period of the PHV. A heating voltage may be applied to the elements during a CPM corresponding to a cold start.
    Type: Application
    Filed: November 12, 2014
    Publication date: June 18, 2015
    Inventors: Kayvan Hedayat, John Hart, Eric Matson, Mark Wilson, Norman Poirier
  • Publication number: 20150131701
    Abstract: A thermocouple including first and second thermoelements arranged to define a hot junction and a cold junction. A thermometer is coupled to at least one of the first and second thermoelements to measure the temperature of said cold junction independent of electronics used for conditioning a signal of said thermocouple. The thermoelements may be thick film elements coupled to a substrate. The thermometer may also be coupled to the substrate.
    Type: Application
    Filed: August 20, 2014
    Publication date: May 14, 2015
    Inventor: Kayvan Hedayat
  • Publication number: 20120324981
    Abstract: A soot sensor includes a soot sensor including a first element on a first surface of the soot sensor. A soot sensing system may include a soot sensor and circuitry electrically coupled to the first element of the soot sensor. The circuitry is configured to determine an amount of soot accumulated on the first element and to control heating of the first element in response to the soot accumulation.
    Type: Application
    Filed: May 25, 2012
    Publication date: December 27, 2012
    Applicant: Stoneridge, Inc.
    Inventors: Kayvan Hedayat, John Hart, Eric Matson, Mark Wilson, Norman Poirier
  • Patent number: 8191431
    Abstract: A sensor includes a shaft and a magnetic sensor and an anti-aging magnetic sensor. The shaft may have at least one magnetized active region. The magnetic sensor may be configured to sense a magnetic field about the shaft, and may provide an output representative of torque applied to the shaft, shaft rotational speed and/or shaft rotational position. The anti-aging magnetic sensor may be positioned adjacent the active region to provide a reference signal output that is substantially independent of torque applied to said shaft.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: June 5, 2012
    Assignee: Stoneridge Control Devices, Inc.
    Inventors: Kayvan Hedayat, Norman Poirier
  • Publication number: 20110265581
    Abstract: A sensor includes a shaft and a magnetic sensor and an anti-aging magnetic sensor. The shaft may have at least one magnetized active region. The magnetic sensor may be configured to sense a magnetic field about the shaft, and may provide an output representative of torque applied to the shaft, shaft rotational speed and/or shaft rotational position. The anti-aging magnetic sensor may be positioned adjacent the active region to provide a reference signal output that is substantially independent of torque applied to said shaft.
    Type: Application
    Filed: July 12, 2011
    Publication date: November 3, 2011
    Applicant: STONERIDGE CONTROL DEVICES, INC.
    Inventors: Kayvan Hedayat, Norman Poirier
  • Publication number: 20110203348
    Abstract: A soot sensor includes a soot sensor including a sensor element and heater element disposed on a first surface of the soot sensor. A soot sensing system may include a soot sensor and circuitry electrically coupled to the sensor and heater elements of the soot sensor. The circuitry is configured to determine an amount of soot accumulated on the soot sensor and to control heating of the heater element in response to the soot accumulation.
    Type: Application
    Filed: February 25, 2011
    Publication date: August 25, 2011
    Applicant: STONERIDGE, INC.
    Inventors: Kayvan Hedayat, John Hart, Eric Matson, Mark Wilson, Norman Poirier
  • Patent number: 8001850
    Abstract: A sensor includes a shaft and a magnetic sensor. The shaft may have at least one magnetized active region. The magnetic sensor may be configured to sense a magnetic field about the shaft, and may provide an output representative of torque applied to the shaft, shaft rotational speed and/or shaft rotational position.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: August 23, 2011
    Assignee: Stoneridge Control Devices, Inc.
    Inventors: Kayvan Hedayat, Norman Poirier
  • Patent number: 7977939
    Abstract: A system and method for non-contact engine parameter sensing. A magnetized engine component establishes a magnetic field that varies in response to stress imparted within the engine. A magnetic field sensing element spaced from the magnetized engine component is configured to provide an output indicative of a state of combustion in response to the magnetic field.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: July 12, 2011
    Assignee: Stoneridge Control Devices, Inc.
    Inventors: Kayvan Hedayat, Norman Poirier
  • Patent number: 7895906
    Abstract: A sensor includes a shaft and a magnetic sensor. The shaft may have at least one magnetized active region. The magnetic sensor may be configured to sense a magnetic field about the shaft, and may provide an output representative of torque applied to the shaft, shaft rotational speed and shaft rotational position.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: March 1, 2011
    Assignee: Stoneridge Control Devices, Inc.
    Inventors: Kayvan Hedayat, Norman Poirier
  • Publication number: 20100077869
    Abstract: A sensor includes a shaft and a magnetic sensor. The shaft may have at least one magnetized active region. The magnetic sensor may be configured to sense a magnetic field about the shaft, and may provide an output representative of torque applied to the shaft, shaft rotational speed and/or shaft rotational position.
    Type: Application
    Filed: August 25, 2009
    Publication date: April 1, 2010
    Applicant: Stoneridge Control Devices, Inc.
    Inventors: Kayvan Hedayat, Norman Poirier