Patents by Inventor Steffen Kuhnert

Steffen Kuhnert 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: 11498083
    Abstract: A fixed-angle rotor for centrifuges includes stiffening ribs on the lower side of its rotor body. Its rotational energy is comparatively low during operation even at high speeds, whereby safety is noticeably increased without the need for a reinforced armored vessel in the centrifuge that is equipped therewith. At the same time, the drive power required to drive the fixed-angle rotor remains low. The fixed-angle rotor also withstands extreme loads over a long period of time. In addition, the fixed-angle rotor can be manufactured cost-effectively, because no additional components are required; rather, the stiffening ribs can also be manufactured during the manufacture of the rotor body. Finally, very thin rotor shells can also be used, which improves the temperature control of the samples, because the fixed-angle rotor has very good structural stability, especially in the main load directions.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: November 15, 2022
    Assignee: Eppendorf AG
    Inventor: Steffen Kühnert
  • Patent number: 11471897
    Abstract: A centrifuge rotor for sample vessels includes a seal between a lower part and a cover. The seal comprises a gasket, which is arranged in a first groove. The first groove is arranged on one of the elements constituted by the cover and the lower part. The first groove, in relation to the axis of rotation of the centrifuge rotor, is open axially toward the other of the elements constituted by the cover and the lower part.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: October 18, 2022
    Assignee: Eppendorf AG
    Inventor: Steffen Kühnert
  • Publication number: 20220072566
    Abstract: A connection construction (10), between a centrifuge rotor (12) and a drive shaft (14) of a laboratory centrifuge (100), allows one-handed operation that does not require any additional tools. The connection construction (10) is designed such that the locking mechanism (16, 48) is constantly guaranteed, preventing the jamming or blocking of the locking elements (16, 48). In addition, the user receives a reliable indication of a locked state (16, 48) by a clearly noticeable click.
    Type: Application
    Filed: December 16, 2019
    Publication date: March 10, 2022
    Applicant: Eppendorf AG
    Inventor: Steffen Kühnert
  • Patent number: 11247215
    Abstract: A centrifuge includes a swing rotor. Rotor arms of the swing rotor have recesses into which hangers of the swing rotor at least partially swing in a swung-out state. As a result, the centrifuge container and thus also the centrifuges are more compact, because the swinging-out requires less space. An inertial mass of the swing rotor is reduced due to the recesses provided therein, whereby energy consumption, primarily when starting the centrifuge, is significantly reduced.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: February 15, 2022
    Assignee: Eppendorf AG
    Inventors: Steffen Kühnert, Heinz Gerhard Köhn
  • Publication number: 20220040709
    Abstract: A connection construction (100) between a centrifuge rotor (102) and a drive shaft (104) of a laboratory centrifuge (200) allows one-handed operation that does not require any additional tools. The connection construction (100) is designed such that the locking mechanism (118, 132, 134) is constantly guaranteed, preventing the jamming or blocking of the locking elements (118, 134).
    Type: Application
    Filed: December 16, 2019
    Publication date: February 10, 2022
    Applicant: Eppendorf AG
    Inventor: Steffen Kühnert
  • Patent number: 11233380
    Abstract: A pre-chamber spark plug includes a housing, a ground electrode, and a pre-chamber defined by the housing and a cap, a center electrode being arranged within the pre-chamber, in which the V/D ratio of the pre-chamber volume V to the largest internal diameter D of the pre-chamber (5) is in the range of from 30 mm2 to 95 mm2.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: January 25, 2022
    Assignee: DKT VERWALTUNGS-GMBH
    Inventor: Steffen Kuhnert
  • Publication number: 20210187518
    Abstract: A centrifuge rotor for sample vessels includes a seal between a lower part and a cover. The seal comprises a gasket, which is arranged in a first groove. The first groove is arranged on one of the elements constituted by the cover and the lower part. The first groove, in relation to the axis of rotation of the centrifuge rotor, is open axially toward the other of the elements constituted by the cover and the lower part.
    Type: Application
    Filed: June 19, 2018
    Publication date: June 24, 2021
    Inventor: Steffen Kühnert
  • Patent number: 11011892
    Abstract: This disclosure relates to a pre-chamber spark plug including a housing, a ground electrode, a cap enclosing a pre-chamber, and a center electrode inside the pre-chamber, with transfer passages being formed in the cap. Center axes of the transfer passages diverge from a longitudinal direction of the main combustion chamber. A method of manufacturing such a pre-chamber spark plug is also disclosed. The method includes generating a housing, generating a ground electrode, and generating a cap enclosing a pre-chamber and having transfer passages formed in the cap. The method may further include generating a center electrode inside the pre-chamber, such that center axes of the transfer passages diverge from a longitudinal direction of the main combustion chamber. The method further includes generating the cap by a forming process from a raw material wire or from raw material bars. The method may further include compacting a material forming the cap.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: May 18, 2021
    Assignee: DKT VERWALTUNGS-GMBH
    Inventor: Steffen Kuhnert
  • Publication number: 20210135433
    Abstract: A pre-chamber spark plug includes a housing, a ground electrode, and a pre-chamber defined by the housing and a cap, a center electrode being arranged within the pre-chamber, in which the V/D ratio of the pre-chamber volume V to the largest internal diameter D of the pre-chamber (5) is in the range of from 30 mm2 to 95 mm2.
    Type: Application
    Filed: December 18, 2017
    Publication date: May 6, 2021
    Inventor: Steffen Kuhnert
  • Publication number: 20200406271
    Abstract: A centrifuge rotor (10) includes a closure (32) between a lower part (12) of the centrifuge rotor (10) and a cover (14). The centrifuge rotor has been improved such that proper single-handed operation is made possible. In particular, the closure (32) can be closed and detached again using just one hand. This means that the closure (32) has a simple structure and can also be produced cost-effectively.
    Type: Application
    Filed: December 12, 2018
    Publication date: December 31, 2020
    Applicant: Eppendorf AG
    Inventors: Steffen Kühnert, Christoph Knospe
  • Publication number: 20200406270
    Abstract: A centrifuge rotor (10) has a closure (32) between a lower part (12) of the centrifuge rotor (10) and a cover (14). The closure has been improved such that proper single-handed operation is made possible. In particular, the closure (32) can be closed and detached again using just one hand. This means that the closure (32) has a simpler structure and can also be produced more cost-effectively.
    Type: Application
    Filed: December 17, 2018
    Publication date: December 31, 2020
    Applicant: Eppendorf AG
    Inventors: Steffen Kühnert, Christoph Knospe
  • Publication number: 20200055060
    Abstract: A fixed-angle rotor for centrifuges includes stiffening ribs on the lower side of its rotor body. Its rotational energy is comparatively low during operation even at high speeds, whereby safety is noticeably increased without the need for a reinforced armored vessel in the centrifuge that is equipped therewith. At the same time, the drive power required to drive the fixed-angle rotor remains low. The fixed-angle rotor also withstands extreme loads over a long period of time. In addition, the fixed-angle rotor can be manufactured cost-effectively, because no additional components are required; rather, the stiffening ribs can also be manufactured during the manufacture of the rotor body. Finally, very thin rotor shells can also be used, which improves the temperature control of the samples, because the fixed-angle rotor has very good structural stability, especially in the main load directions.
    Type: Application
    Filed: August 15, 2019
    Publication date: February 20, 2020
    Inventor: Steffen Kühnert
  • Publication number: 20200036166
    Abstract: This disclosure relates to a pre-chamber spark plug including a housing, a ground electrode, a cap enclosing a pre-chamber, and a center electrode inside the pre-chamber, with transfer passages being formed in the cap. Center axes of the transfer passages diverge from a longitudinal direction of the main combustion chamber. A method of manufacturing such a pre-chamber spark plug is also disclosed. The method includes generating a housing, generating a ground electrode, and generating a cap enclosing a pre-chamber and having transfer passages formed in the cap. The method may further include generating a center electrode inside the pre-chamber, such that center axes of the transfer passages diverge from a longitudinal direction of the main combustion chamber. The method further includes generating the cap by a forming process from a raw material wire or from raw material bars. The method may further include compacting a material forming the cap.
    Type: Application
    Filed: December 18, 2017
    Publication date: January 30, 2020
    Inventor: Steffen KUHNERT
  • Publication number: 20190143341
    Abstract: A centrifuge includes a swing rotor. Rotor arms of the swing rotor have recesses into which hangers of the swing rotor at least partially swing in a swung-out state. As a result, the centrifuge container and thus also the centrifuges are more compact, because the swinging-out requires less space. An inertial mass of the swing rotor is reduced due to the recesses provided therein, whereby energy consumption, primarily when starting the centrifuge, is significantly reduced.
    Type: Application
    Filed: November 15, 2018
    Publication date: May 16, 2019
    Inventors: Steffen Kühnert, Heinz Gerhard Köhn
  • Patent number: 9972979
    Abstract: A pre-chamber spark plug for igniting a fuel-air mixture in an internal combustion engine, in particular a gasoline engine, comprises a spark plug body (1) having a pre-chamber housing (2) and a cap (4) which at least partially closes the pre-chamber (3), and further comprises a ground electrode (11) in the spark plug body (1) as well as a central electrode (7) which protrudes into the pre-chamber (3); the ground electrode (11) has an annular shape and, on the inner surface thereof, includes at least one ignition area (17) designed as a cam (16) as well as a radially inward extending protrusion (18) as a baffle (19).
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: May 15, 2018
    Assignee: DKT Verwaltungs-GmbH
    Inventor: Steffen Kuhnert
  • Patent number: 9929539
    Abstract: A prechamber spark plug for igniting a fuel-air mixture in an internal combustion engine, in particular a gas engine, having a spark plug body (1) comprising a prechamber housing (2) and a cap (4) that closes the prechamber (3) at least partially, a ground electrode (10) and a central electrode (7) isolated from the ground electrode and projecting into the prechamber, is designed and developed with simple structural means in order to obtain advantageous igniting properties, the ground electrode (10) being designed for that purpose essentially as a cylindrical pin (11) that can be welded in a passage (12), preferably a bore (12), in the spark plug body (1).
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: March 27, 2018
    Assignee: DKT Verwaltungs-GmbH
    Inventors: Georg Maul, Steffen Kuhnert
  • Publication number: 20170358906
    Abstract: A pre-chamber spark plug for igniting a fuel-air mixture in an internal combustion engine, in particular a gasoline engine, comprises a spark plug body (1) having a pre-chamber housing (2) and a cap (4) which at least partially closes the pre-chamber (3), and further comprises a ground electrode (11) in the spark plug body (1) as well as a central electrode (7) which protrudes into the pre-chamber (3); the ground electrode (11) has an annular shape and, on the inner surface thereof, includes at least one ignition area (17) designed as a cam (16) as well as a radially inward extending protrusion (18) as a baffle (19).
    Type: Application
    Filed: November 30, 2015
    Publication date: December 14, 2017
    Applicant: DKT Verwaltungs-GmbH
    Inventor: Steffen Kuhnert
  • Publication number: 20160254650
    Abstract: A prechamber spark plug for igniting a fuel-air mixture in an internal combustion engine, in particular a gas engine, having a spark plug body (1) comprising a prechamber housing (2) and a cap (4) that closes the prechamber (3) at least partially, a ground electrode (10) and a central electrode (7) isolated from the ground electrode and projecting into the prechamber, is designed and developed with simple structural means in order to obtain advantageous igniting properties, the ground electrode (10) being designed for that purpose essentially as a cylindrical pin (11) that can be welded in a passage (12), preferably a bore (12), in the spark plug body (1).
    Type: Application
    Filed: July 25, 2014
    Publication date: September 1, 2016
    Inventors: Georg Maul, Steffen Kuhnert