Patents by Inventor Leo Holma

Leo Holma 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: 11692914
    Abstract: The aerosol diluting apparatus includes a first diluting unit to provide a first modified sample flow by combining an aerosol sample flow with a first diluting gas flow, an ejector unit to draw the first modified sample flow from the first diluting unit to the ejector unit and to provide a second modified sample flow by mixing a second dilution gas flow with the first modified sample flow, a control unit, and a control valve, wherein the control unit and the control valve are arranged to adjust flow rate of the second dilution gas flow according to an inlet pressure of the aerosol sample flow, so as to keep the dilution factor of the diluting apparatus substantially independent of the inlet pressure.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: July 4, 2023
    Assignee: Dekati Oy
    Inventors: Ville Niemelä, Leo Holma, Sami Lundahl, Ari Ukkonen
  • Publication number: 20220163430
    Abstract: The aerosol diluting apparatus includes a first diluting unit to provide a first modified sample flow by combining an aerosol sample flow with a first diluting gas flow, an ejector unit to draw the first modified sample flow from the first diluting unit to the ejector unit and to provide a second modified sample flow by mixing a second dilution gas flow with the first modified sample flow, a control unit, and a control valve, wherein the control unit and the control valve are arranged to adjust flow rate of the second dilution gas flow according to an inlet pressure of the aerosol sample flow, so as to keep the dilution factor of the diluting apparatus substantially independent of the inlet pressure.
    Type: Application
    Filed: February 10, 2020
    Publication date: May 26, 2022
    Applicant: Dekati Oy
    Inventors: Ville NIEMELÄ, Leo HOLMA, Sami LUNDAHL, Ari UKKONEN
  • Patent number: 11101622
    Abstract: A particle measuring apparatus includes a charging unit to form charged particles from aerosol particles carried by an input flow, and a particle detector to provide an electric current by collecting the charged particles, wherein the charging unit in turn includes a counter-electrode having a substantially hemispherical inner portion to define a charging space, an inlet channel for guiding aerosol particles into the charging space, a corona electrode to form charged particles from the aerosol particles by generating a corona discharge in the charging space, and an outlet channel for guiding charged particles from the charging space to the detector.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: August 24, 2021
    Assignee: Dekati Oy
    Inventors: Ville Niemelä, Leo Holma, Sami Lundahl, Tyler Beck
  • Publication number: 20180331510
    Abstract: A particle measuring apparatus includes a charging unit to form charged particles from aerosol particles carried by an input flow, and a particle detector to provide an electric current by collecting the charged particles, wherein the charging unit in turn includes a counter-electrode having a substantially hemispherical inner portion to define a charging space, an inlet channel for guiding aerosol particles into the charging space, a corona electrode to form charged particles from the aerosol particles by generating a corona discharge in the charging space, and an outlet channel for guiding charged particles from the charging space to the detector.
    Type: Application
    Filed: October 3, 2016
    Publication date: November 15, 2018
    Inventors: Ville Niemelä, Leo Holma, Sami Lundahl, Tyler Beck
  • Patent number: 9791361
    Abstract: A particle measuring apparatus includes a distributor unit arranged to provide a first partial flow and a second partial flow by separating the second partial flow from an input flow, a particle collecting unit to collect particles from the first partial flow by using a first filter, and a particle monitoring unit to form charged particles by charging particles carried by the second partial flow, and to provide an electric current by collecting the charged particles.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: October 17, 2017
    Assignee: Dekati Oy
    Inventors: Ville Niemelä, Leo Holma, Sami Lundahl, Tyler Beck
  • Patent number: 9791360
    Abstract: A particle measuring apparatus includes a distributor unit arranged to provide a first partial flow and a second partial flow by separating the second partial flow from an input flow, a particle collecting unit to collect particles from the first partial flow by using a first filter, and a particle monitoring unit to form charged particles by charging particles carried by the second partial flow, and to provide an electric current by collecting the charged particles.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: October 17, 2017
    Assignee: Dekati Oy
    Inventors: Ville Niemelä, Leo Holma, Sami Lundahl, Tyler Beck
  • Publication number: 20170115197
    Abstract: A particle measuring apparatus includes a distributor unit arranged to provide a first partial flow and a second partial flow by separating the second partial flow from an input flow, a particle collecting unit to collect particles from the first partial flow by using a first filter, and a particle monitoring unit to form charged particles by charging particles carried by the second partial flow, and to provide an electric current by collecting the charged particles.
    Type: Application
    Filed: October 26, 2015
    Publication date: April 27, 2017
    Inventors: Ville NIEMELÄ, Leo HOLMA, Sami LUNDAHL, Tyler Beck
  • Publication number: 20170115198
    Abstract: A particle measuring apparatus includes a distributor unit arranged to provide a first partial flow and a second partial flow by separating the second partial flow from an input flow, a particle collecting unit to collect particles from the first partial flow by using a first filter, and a particle monitoring unit to form charged particles by charging particles carried by the second partial flow, and to provide an electric current by collecting the charged particles.
    Type: Application
    Filed: October 26, 2015
    Publication date: April 27, 2017
    Inventors: Ville NIEMELÄ, Leo HOLMA, Sami LUNDAHL, Tyler Beck
  • Patent number: 7318338
    Abstract: The invention relates to a measuring device for measuring aerosols, which measuring device comprises detection means (13), means (41) for conveying a signal from the detection means (13), a first insulation (43), a second insulation (44), and a supporting means (42). The first insulation (43) insulates the medium (41) from the supporting means (42), and the second insulation (44) insulates the detection means (13) from the supporting means (42). Also, the second insulation (44) is designed in such a way that it positions the detection means (13) in a predetermined location.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: January 15, 2008
    Assignee: Dekati Oy
    Inventors: Mikko Moisio, Risto Luoma, Kimmo Pietarinen, Leo Holma, Marko Palonen
  • Patent number: 7152457
    Abstract: An impactor, a frame part for an impactor, a part to be used in an impactor, and a method for processing elements belonging to the impactor. Different elements belonging to different stages of the impactor are coupled to each other with a connecting element in such a way that they can be inserted in the frame part of the impactor, removed from it, or processed, as a single unit.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: December 26, 2006
    Assignee: Dekati Oy
    Inventors: Mikko Moisio, Risco Luoma, Kimmo Pietarinen, Leo Holma, Marko Palonen
  • Publication number: 20050081600
    Abstract: The invention relates to an impactor, a frame part for an impactor, a part to be used in an impactor, and a method for processing elements belonging to the impactor. According to the invention, different elements belonging to different stages of the impactor are coupled to each other by means of a connecting element in such a way that they can be inserted in the frame part of the impactor, removed from it, or processed, as a single unit.
    Type: Application
    Filed: November 20, 2002
    Publication date: April 21, 2005
    Inventors: Mikko Moisio, Risco Luoma, Kimmo Pietarinen, Leo Holma, Marko Palonen
  • Publication number: 20050039517
    Abstract: The invention relates to a measuring device for measuring aerosols, which measuring device comprises detection means (13), means (41) for conveying a signal from the detection means (13), a first insulation (43), a second second insulation (44), and a supporting means (42). The first insulation (43) insulates the medium (41) from the supporting means (42), and the second insulation (44) insulates the detection means (13) from the supporting means (42). Also, the second insulation (44) is designed in such a way that it positions the detection means (13) in a predetermined location.
    Type: Application
    Filed: November 20, 2002
    Publication date: February 24, 2005
    Inventors: Mikko Moisio, Risto Luoma, Kimmo Pietarinen, Leo Holma, Marko Palonen