Patents by Inventor Igor A. Krichtafovitch

Igor A. Krichtafovitch 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: 10792673
    Abstract: An electrostatic air cleaner may include a corona charging stage, a precipitation stage, and an air mover (fan). The corona charging stage may include a first and second array placed under electrical potential difference capable of generating a corona discharge. The first array may be substantially parallel corona wires and may be located downstream of an air penetrable second array. The precipitation stage may be downstream from the corona charging stage. The spacing between the first array and the second array may be less than the distance of the precipitation stage to the second array. The air mover may be upstream of the corona charging stage or downstream of the precipitation stage or between these stages. The arrangement allows for higher ion output downstream of the first array with the same voltage and power consumption resulting in greater particle charging and better air cleaning efficiency.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: October 6, 2020
    Inventor: Igor Krichtafovitch
  • Patent number: 10760784
    Abstract: A perforated flame holder and burner including a perforated flame holder provides reduced oxides of nitrogen (NOx) during operation. The perforated flame holder includes a pattern of elongated apertures extending between a proximal and a distal surface of the flame holder relative to a fuel nozzle. The perforated flame holder can provide a significantly reduced flame height while maintaining heat output from the burner.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: September 1, 2020
    Assignee: CLEARSIGN TECHNOLOGIES CORPORATION
    Inventors: Douglas W. Karkow, Joseph Colannino, Igor A. Krichtafovitch, Robert E. Breidenthal, Christopher A. Wiklof
  • Publication number: 20200188929
    Abstract: An electrostatic air cleaner may include a corona charging stage, a precipitation stage, and an air mover (fan). The corona charging stage may include a first and second array placed under electrical potential difference capable of generating a corona discharge. The first array may be substantially parallel corona wires and may be located downstream of an air penetrable second array. The precipitation stage may be downstream from the corona charging stage. The spacing between the first array and the second array may be less than the distance of the precipitation stage to the second array. The air mover may be upstream of the corona charging stage or downstream of the precipitation stage or between these stages. The arrangement allows for higher ion output downstream of the first array with the same voltage and power consumption resulting in greater particle charging and better air cleaning efficiency.
    Type: Application
    Filed: December 13, 2018
    Publication date: June 18, 2020
    Applicant: Pacific Air Filtration Holdings, LLC
    Inventor: Igor Krichtafovitch
  • Publication number: 20200188931
    Abstract: An electrostatic device, for example, an electrostatic air cleaner, may be provided with a corona discharge electrode; a collecting electrode; a power source connected to the corona discharge electrode and to the collecting electrode; an electrical parameter sensor; and a power supply system. The control system may receive a signal from the electrical sensor. The control system evaluates the electrical performance of the system and initiates appropriate or corrective action.
    Type: Application
    Filed: December 13, 2018
    Publication date: June 18, 2020
    Applicant: Pacific Air Filtration Holdings, LLC
    Inventor: Igor Krichtafovitch
  • Publication number: 20200188932
    Abstract: An electrostatic air cleaner may be operated according to a manner designed to achieve acceptable air quality while balancing power usage and corona electrode degradation levels. The voltage applied to the corona electrode(s) may be controlled as well as the voltage applied to repelling electrodes and air flow velocity. The air cleaner may also be operated to achieve desired particle separation.
    Type: Application
    Filed: December 13, 2018
    Publication date: June 18, 2020
    Applicant: Pacific Air Filtration Holdings, LLC
    Inventor: Igor Krichtafovitch
  • Patent number: 10677454
    Abstract: Two or more unipolar voltage generation systems may apply respective voltages to separate but complementary electrodes. The complementary electrodes may be disposed substantially congruently or analogously to one another to provide bipolar electrical effects on a combustion reaction.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: June 9, 2020
    Assignee: CLEARSIGN TECHNOLOGIES CORPORATION
    Inventor: Igor A. Krichtafovitch
  • Patent number: 10668483
    Abstract: Electronic air cleaners for use in heating, air-conditioning, and ventilation (HVAC) systems and associated methods and systems are disclosed herein. In one embodiment, an electronic air cleaner includes one or more collecting electrodes having a collection material with a porous, open-cell structure and a conductive internal portion. The collection material can be configured to collect and receive charged particulate matter in an airflow path. After a period of time, used collection material can be removed from individual collecting electrodes and replaced with new collection material.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: June 2, 2020
    Assignee: University of Washington
    Inventor: Igor Krichtafovitch
  • Patent number: 10627106
    Abstract: A high voltage can be applied to a combustion reaction to enhance or otherwise control the combustion reaction. The high voltage is switched on or off by a grid electrode interposed between a high voltage electrode assembly and the combustion reaction.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: April 21, 2020
    Assignee: CLEARSIGN TECHNOLOGIES CORPORATION
    Inventors: Igor A. Krichtafovitch, Christopher A. Wiklof
  • Patent number: 10571124
    Abstract: A burner supporting primary and secondary combustion reactions may include a primary combustion reaction actuator configured to select a location of the secondary combustion reaction. A burner may include a perforated flame holder structure configured to support a secondary combustion reaction above a partial premixing region. The secondary flame support location may be selected as a function of a turndown parameter. Selection logic may be of arbitrary complexity.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: February 25, 2020
    Assignee: CLEARSIGN COMBUSTION CORPORATION
    Inventors: Douglas W. Karkow, James K. Dansie, Jesse Dumas, Donald Kendrick, Igor A. Krichtafovitch, Joseph Colannino, Christopher A. Wiklof
  • Publication number: 20190351431
    Abstract: An electronic air filter having a plurality of electrodes supported by rigid fixtures that are attached to a common case. The rigid fixtures that support the electrodes with different electrical potentials are attached to each other or to a common body in a way that increases or maximizes the creeping discharge path along the surface. Even conductive contaminants do not, therefore, provide an electrical shortage between the electrodes.
    Type: Application
    Filed: June 13, 2017
    Publication date: November 21, 2019
    Applicant: Pacific Air Filtration Holdings, LLC
    Inventor: Igor Krichtafovitch
  • Publication number: 20190329269
    Abstract: A collecting electrode element for an electrostatic air cleaner with a reduced weight can be constructed with a lightweight conductive core sandwiched between particle collection layers which are supported and stabilized by a rigid frame. The conductive core may be conductive foil, conductive film, conductive ink, or conductive glue. The particle collecting layers may be flexible open-cell foam such as melamine which may be compressed between opposing frame elements. The frame may leave most and preferably at least 90% of the surface of the particle collecting layers exposed. The frame may have opposing frame elements secured to each other at a compressed area of the particle-collecting layers.
    Type: Application
    Filed: June 13, 2017
    Publication date: October 31, 2019
    Applicant: Pacific Air Filtration Holdings, LLC
    Inventor: Igor KRICHTAFOVITCH
  • Patent number: 10458649
    Abstract: A horizontally-fired flame burner includes a flame holder positioned laterally from the burner. The flame holder includes a plurality of perforations that collectively confine a combustion reaction of the burner to the flame holder.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: October 29, 2019
    Assignee: CLEARSIGN COMBUSTION CORPORATION
    Inventors: Douglas W. Karkow, Joseph Colannino, Igor A. Krichtafovitch, Christopher A. Wiklof
  • Patent number: 10364980
    Abstract: Technologies are described for applying electrical energy according to a physical extent of a combustion reaction, which may include: supporting a combustion reaction at a fuel source; sensing a physical extent of the combustion reaction with respect to a plurality of different locations of a plurality of electrodes; and applying electrical energy to the combustion reaction via at least one of the plurality of electrodes responsive to the physical extent of the combustion reaction. Sensing the physical extent of the combustion reaction may include receiving a sensor signal corresponding to the physical extent of the combustion reaction.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: July 30, 2019
    Assignee: CLEARSIGN COMBUSTION CORPORATION
    Inventors: Joseph Colannino, David B. Goodson, Igor A. Krichtafovitch, Tracy A. Prevo, Christopher A. Wiklof
  • Patent number: 10359189
    Abstract: An charge element disposed proximate to a combustion reaction is caused to carry a voltage while also being prevented from arc-discharging or arc-charging to or from the combustion reaction, by a current limiting element in electrical continuity with the charge element.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: July 23, 2019
    Assignee: CLEARSIGN COMBUSTION CORPORATION
    Inventors: Igor A. Krichtafovitch, Christopher A. Wiklof
  • Patent number: 10359213
    Abstract: A fire tube boiler includes a perforated flame holder configured to hold a combustion reaction that produces very low oxides of nitrogen (NOx).
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: July 23, 2019
    Assignee: CLEARSIGN COMBUSTION CORPORATION
    Inventors: Douglas W. Karkow, Joseph Colannino, Igor A. Krichtafovitch, Robert E. Breidenthal, Christopher A. Wiklof
  • Patent number: 10295175
    Abstract: Technologies are provided for applying energy to a combustion reaction. For example, a method may include supporting a combustion reaction; applying energy to the combustion reaction via one or more control signals; detecting a change in one or more parameters associated with the combustion reaction; comparing the change in the one or more parameters to a database; determining whether the change in the one or more parameters corresponds to a change in the combustion reaction; selecting a change in the one or more control signals from the database; and applying the change in the one or more control signals to change the a value of the energy applied to the combustion reaction responsive to changes in the one or more parameters associated with in the combustion reaction.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: May 21, 2019
    Assignee: CLEARSIGN COMBUSTION CORPORATION
    Inventors: Joseph Colannino, Richard F. Rutkowski, Igor A. Krichtafovitch, David B. Goodson, Christopher A. Wiklof
  • Patent number: 10281141
    Abstract: A system and method for electrically controlling a position of a combustion reaction and/or for protecting a flame controller by decoupling an ionizer from a power supply.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: May 7, 2019
    Assignee: CLEARSIGN COMBUSTION CORPORATION
    Inventors: Igor A. Krichtafovitch, Christopher A. Wiklof
  • Patent number: 10240788
    Abstract: A combustion system includes an electrically actuated flame location control mechanism.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: March 26, 2019
    Assignee: CLEARSIGN COMBUSTION CORPORATION
    Inventors: Douglas W. Karkow, Joseph Colannino, Igor A. Krichtafovitch, Robert E. Breidenthal, Christopher A. Wiklof
  • Patent number: 10174938
    Abstract: A system and method for electrically charging a combustion flame with a power supply.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: January 8, 2019
    Assignee: CLEARSIGN COMBUSTION CORPORATION
    Inventor: Igor A. Krichtafovitch
  • Publication number: 20190003705
    Abstract: According to an embodiment, a combustion system is provided, which includes a nozzle configured to emit a diverging fuel flow, a flame holder positioned in the path of the fuel flow and that includes a plurality of apertures extending therethrough, and a preheat mechanism configured to heat the flame to a temperature exceeding a startup temperature threshold.
    Type: Application
    Filed: August 20, 2018
    Publication date: January 3, 2019
    Inventors: DOUGLAS W. KARKOW, JOSEPH COLANNINO, IGOR A. KRICHTAFOVITCH, CHRISTOPHER A. WIKLOF