Patents by Inventor Jürg Rast

Jürg Rast 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: 12030044
    Abstract: The present application relates to a pipetting device and a pipetting method for pipetting, therefore for aspirating and/or dispensing, a metered liquid using a working gas, independently of the flow- and/or wetting characteristics of the metered liquid, wherein a pipetting channel comprises a first working region, of which the known base temperature is in a lower base temperature range, and a second working region, of which the known working temperature is in a working temperature range that is increased with respect to the base temperature range.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: July 9, 2024
    Assignee: HAMIL TON BONADUZ AG
    Inventors: Jonas Hilti, Jürg Rast
  • Patent number: 11911757
    Abstract: A pipetting device includes a pipetting channel at least partially filled with working gas, a pipetting tip accessible through a pipetting opening such that the volume of dosing liquid drawn into the receiving chamber can be varied by changing the pressure of the working gas in the receiving chamber, a pipetting piston for changing the pressure of the working gas and accommodated in the pipetting channel to be movable along the pipetting channel, a drive driving the pipetting piston to perform a movement along the pipetting channel, a control device controlling the drive, and a pressure sensor sensing the pressure of the working gas. The control device controls the drive to generate a pressure pulse in the pipetting channel based on the pressure signal output by the pressure sensor whereby the pressure of the working gas during the pulse follows a predefined working gas target pressure pulse curve.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: February 27, 2024
    Assignee: HAMILTON BONADUZ AG
    Inventors: Hanspeter Romer, Reto Ettinger, Fridolin Gysel, Jürg Rast, Jonas Hilti
  • Patent number: 11539271
    Abstract: There is provided a method for contactless determination of the position of a driven moving portion (4) of an electric motor (2) by means of a plurality of magnetic field sensors (8), wherein the moving portion is movably arranged with respect to a stator (6) and has a plurality of permanent magnets (40) which generate a moving-portion magnetic field having a plurality of periodically spaced apart maxima, and wherein the plurality of magnetic field sensors are arranged along a movement path (43) of the moving portion.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: December 27, 2022
    Assignee: HAMILTON BONADUZ AG
    Inventors: Reto Ettinger, Jürg Rast, Fridolin Gysel
  • Publication number: 20220379295
    Abstract: The present application relates to a pipetting device and a pipetting method for pipetting, therefore for aspirating and/or dispensing, a metered liquid using a working gas, independently of the flow- and/or wetting characteristics of the metered liquid, wherein a pipetting channel comprises a first working region, of which the known base temperature is in a lower base temperature range, and a second working region, of which the known working temperature is in a working temperature range that is increased with respect to the base temperature range.
    Type: Application
    Filed: October 1, 2020
    Publication date: December 1, 2022
    Applicant: HAMILTON BONADUZ AG
    Inventors: Jonas Hilti, Jürg Rast
  • Patent number: 11504708
    Abstract: A pipetting apparatus and method for pulsed dispensing of small metered-liquid doses of no more than 1 ?l. The apparatus includes a pipetting conduit at least partly filled with working gas, a pressure-modifying apparatus for modifying the pressure of the working gas, and a control apparatus for applying control to the pressure-modifying apparatus. The control apparatus can control the pressure-modifying apparatus so as to generate in the pipetting conduit, with respect to a reference holding pressure in the pipetting conduit which is necessary for immovable holding of the metered-liquid quantity, an overpressure pulse having a pulse duration of no more than 40 ms.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: November 22, 2022
    Assignee: HAMILTON BONADUZ AG
    Inventors: Hanspeter Romer, Reto Ettinger, Fridolin Gysel, Jürg Rast, Jonas Hilti
  • Publication number: 20210154659
    Abstract: A pipetting device includes a pipetting channel at least partially filled with working gas, a pipetting tip which is accessible through a pipetting opening such that the volume of dosing liquid drawn into the receiving chamber through the pipetting opening can be varied by changing the pressure of the working gas in the receiving chamber, a pipetting piston for changing the pressure of the working gas and accommodated in the pipetting channel so as to be movable along the pipetting channel, a drive for driving the pipetting piston to perform a movement along the pipetting channel, a control device for controlling the drive, and a pressure sensor for sensing the pressure of the working gas. The control device controls the drive to generate a pressure pulse in the pipetting channel based on the pressure signal output by the pressure sensor such that the pressure of the working gas during the pulse follows a predefined working gas target pressure pulse curve.
    Type: Application
    Filed: July 9, 2019
    Publication date: May 27, 2021
    Inventors: Hanspeter Romer, Reto Ettinger, Fridolin Gysel, Jürg Rast, Jonas Hilti
  • Publication number: 20200076275
    Abstract: There is provided a method for contactless determination of the position of a driven moving portion (4) of an electric motor (2) by means of a plurality of magnetic field sensors (8), wherein the moving portion is movably arranged with respect to a stator (6) and has a plurality of permanent magnets (40) which generate a moving-portion magnetic field having a plurality of periodically spaced apart maxima, and wherein the plurality of magnetic field sensors are arranged along a movement path (43) of the moving portion.
    Type: Application
    Filed: May 3, 2018
    Publication date: March 5, 2020
    Inventors: Reto ETTINGER, Jürg RAST, Fridolin GYSEL
  • Publication number: 20190358626
    Abstract: A pipetting apparatus and method for pulsed dispensing of small metered-liquid doses of no more than 1 ?l. The apparatus includes a pipetting conduit at least partly filled with working gas, a pressure-modifying apparatus for modifying the pressure of the working gas, and a control apparatus for applying control to the pressure-modifying apparatus. The control apparatus can control the pressure-modifying apparatus so as to generate in the pipetting conduit, with respect to a reference holding pressure in the pipetting conduit which is necessary for immovable holding of the metered-liquid quantity, an overpressure pulse having a pulse duration of no more than 40 ms.
    Type: Application
    Filed: December 11, 2017
    Publication date: November 28, 2019
    Applicant: Hamilton Bonaduz AG
    Inventors: Hanspeter Romer, Reto Ettinger, Fridolin Gysel, Jürg Rast, Jonas Hilti