Patents by Inventor Frank Graskowski

Frank Graskowski 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: 11942290
    Abstract: A vacuum interrupter has a cover base formed with an insertion opening for an axially movable moving contact rod carrying a moving contact. The moving contact rod is routed out of the vacuum interrupter in a vacuum-tight manner by way of a bellows. The bellows has a centering appendage which is formed by a tubular end piece of the bellows that runs parallel to the longitudinal axis of the bellows and is inserted into the insertion opening. The bellows moreover has a bellows base which is disposed on the centering appendage, runs substantially transversely to the longitudinal axis of the bellows, and is formed with a through-opening for the moving contact rod.
    Type: Grant
    Filed: December 2, 2021
    Date of Patent: March 26, 2024
    Assignee: Siemens Aktiengesellschaft
    Inventors: Thomas Brauner, Frank Graskowski, Klaus Schachtschneider
  • Publication number: 20240038467
    Abstract: A vacuum interrupter has a cover base formed with an insertion opening for an axially movable moving contact rod carrying a moving contact. The moving contact rod is routed out of the vacuum interrupter in a vacuum-tight manner by way of a bellows. The bellows has a centering appendage which is formed by a tubular end piece of the bellows that runs parallel to the longitudinal axis of the bellows and is inserted into the insertion opening. The bellows moreover has a bellows base which is disposed on the centering appendage, runs substantially transversely to the longitudinal axis of the bellows, and is formed with a through-opening for the moving contact rod.
    Type: Application
    Filed: December 2, 2021
    Publication date: February 1, 2024
    Inventors: Thomas Brauner, Frank Graskowski, Klaus Schachtschneider
  • Publication number: 20230368986
    Abstract: A contact for a vacuum interrupter of a low, medium or high-voltage switchgear includes a contact rod composed of a first electrically conductive material and extending along a longitudinal axis of the contact, and a contact piece composed of a second electrically conductive material and fastened to an end face of the contact rod. The contact rod and the contact piece are materially bonded to one another at a connecting face. At least one of the contact rod or the contact piece has a wall which delimits the connecting face, rises perpendicularly to the longitudinal axis and is disposed such that the contact piece and the contact rod are also force-lockingly connected to one another by a force acting transversely to the longitudinal axis between the contact piece and the contact rod. A production method for such a contact is also provided.
    Type: Application
    Filed: September 17, 2021
    Publication date: November 16, 2023
    Inventors: Frank Graskowski, Uwe Jahnke, Denis Donner, Thomas Brauner, Klaus Oberndörfer
  • Publication number: 20230360871
    Abstract: A compact vacuum interrupter has an insulator element, a moving contact connection, a fixed contact connection, a moving contact, and a fixed contact. The moving contact has a moving contact rod and a moving-contact contact element. The fixed contact has a fixed contact rod and a fixed-contact contact element. The moving contact is formed with a material that is mechanically stronger than a material of the fixed contact.
    Type: Application
    Filed: September 13, 2021
    Publication date: November 9, 2023
    Inventors: Frank Graskowski, Ulf Schümann, Alexander Ziefle
  • Patent number: 11676784
    Abstract: A vacuum interrupter includes at least one insulating body, a fixed contact, a fixed contact flange, a moving contact having a longitudinal axis of the moving contact, a moving contact flange, a moving contact bearing, and a bellows. The fixed contact is stationarily disposed in the fixed contact flange, the moving contact is moveably guided in the moving contact bearing and the moving contact is moveably secured to the moving contact flange by the bellows. The bellows is secured to the moving contact flange by a first bellows end and the bellows is secured to the moving contact by a second bellows end. An increased pressure resistance of the vacuum interrupter against ambient pressures over 1 bar is achieved by a sleeve which is secured to the moving contact against movements along the longitudinal axis of the moving contact, and which is guided through the moving contact bearing.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: June 13, 2023
    Assignee: Siemens Energy Global GmbH & Co. KG
    Inventors: Lydia Baron, Frank Graskowski, Uwe Jahnke, Christian Stiehler, Andreas Lawall, Klaus Schachtschneider
  • Patent number: 11342142
    Abstract: A shield element for a vacuum interrupter for installation between an electrically conductive wall element and an electrically insulating wall element of a vacuum interrupter includes a connection region, a shield inner region and a shield outer region. The shield outer region can be disposed outside of and the shield inner region can be disposed within the vacuum interrupter. The connection region has a first structure and a second structure which prevent the formation of mechanical stresses after soldering of the vacuum interrupter. A vacuum interrupter, a method for producing a shield element and a method for producing a vacuum interrupter are also provided.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: May 24, 2022
    Assignee: Siemens Aktiengesellschaft
    Inventors: Lydia Baron, Frank Graskowski, Christian Stiehler
  • Patent number: 11289292
    Abstract: A vacuum interrupter tube contains at least one insulating body, a fixed contact, a fixed contact flange, a moving contact having a longitudinal axis, a moving contact flange, and a bellows. The fixed contact is stationarily arranged in the fixed contact flange. The moving contact is moveably guided and the moving contact is moveably secured to the moving contact flange by the bellows. The bellows is secured to the moving contact flange by a first bellows end and the bellows is secured to the moving contact by a second bellows end. Therein the vacuum interrupter tube is protected against the deformation of at least one of the fixed contact flange and the moving contact flange due to an ambient pressure of the vacuum interrupter tube of over two bar by a stiffened fixed contact flange and/or a stiffened moving contact flange.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: March 29, 2022
    Assignee: Siemens Energy Global GmbH & Co. KG
    Inventors: Lydia Baron, Frank Graskowski, Andreas Lawall, Christian Stiehler
  • Publication number: 20210074494
    Abstract: A vacuum interrupter includes at least one insulating body, a fixed contact, a fixed contact flange, a moving contact having a longitudinal axis of the moving contact, a moving contact flange, a moving contact bearing, and a bellows. The fixed contact is stationarily disposed in the fixed contact flange, the moving contact is moveably guided in the moving contact bearing and the moving contact is moveably secured to the moving contact flange by the bellows. The bellows is secured to the moving contact flange by a first bellows end and the bellows is secured to the moving contact by a second bellows end. An increased pressure resistance of the vacuum interrupter against ambient pressures over 1 bar is achieved by a sleeve which is secured to the moving contact against movements along the longitudinal axis of the moving contact, and which is guided through the moving contact bearing.
    Type: Application
    Filed: November 20, 2018
    Publication date: March 11, 2021
    Inventors: LYDIA BARON, FRANK GRASKOWSKI, UWE JAHNKE, CHRISTIAN STIEHLER, ANDREAS LAWALL, KLAUS SCHACHTSCHNEIDER
  • Publication number: 20210074493
    Abstract: A vacuum interrupter tube contains at least one insulating body, a fixed contact, a fixed contact flange, a moving contact having a longitudinal axis, a moving contact flange, and a bellows. The fixed contact is stationarily arranged in the fixed contact flange. The moving contact is moveably guided and the moving contact is moveably secured to the moving contact flange by the bellows. The bellows is secured to the moving contact flange by a first bellows end and the bellows is secured to the moving contact by a second bellows end. Therein the vacuum interrupter tube is protected against the deformation of at least one of the fixed contact flange and the moving contact flange due to an ambient pressure of the vacuum interrupter tube of over two bar by a stiffened fixed contact flange and/or a stiffened moving contact flange.
    Type: Application
    Filed: November 20, 2018
    Publication date: March 11, 2021
    Inventors: LYDIA BARON, FRANK GRASKOWSKI, ANDREAS LAWALL, CHRISTIAN STIEHLER
  • Publication number: 20210074495
    Abstract: A shield element for a vacuum interrupter for installation between an electrically conductive wall element and an electrically insulating wall element of a vacuum interrupter includes a connection region, a shield inner region and a shield outer region. The shield outer region can be disposed outside of and the shield inner region can be disposed within the vacuum interrupter. The connection region has a first structure and a second structure which prevent the formation of mechanical stresses after soldering of the vacuum interrupter. A vacuum interrupter, a method for producing a shield element and a method for producing a vacuum interrupter are also provided.
    Type: Application
    Filed: November 20, 2018
    Publication date: March 11, 2021
    Inventors: LYDIA BARON, FRANK GRASKOWSKI, CHRISTIAN STIEHLER
  • Patent number: 10840044
    Abstract: A ceramic insulator for vacuum interrupters extends along a longitudinal extent and forms a cavity in said longitudinal extent. The cavity has a first opening on a first end of the longitudinal extent and a second opening on a second end of the longitudinal extent. The openings are designed so that they can be sealed in a gas-tight manner using appropriate connections. The sealed first opening is designed to guide at least one fixed contact into the cavity, and the sealed second opening is designed to guide at least one moving contact into the cavity. The ceramic insulator has, on an inner face of the cavity, one or multiple electrically conductive discharge path interrupters extending perpendicularly to the longitudinal extent of the ceramic insulator.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: November 17, 2020
    Assignee: Siemens Aktiengesellschaft
    Inventors: Frank Graskowski, Angelika Hartmann, Sylvio Kosse, Andreas Lawall
  • Patent number: 10418211
    Abstract: A switching contact, of a vacuum interrupter including support bodies, includes an additional support body which has the shape of a truncated cone or of a hollow truncated cone or of a partially hollow truncated cone. The additional support body is offset from a first location or region on the bottom of the contact carrier, located in the notional extension of the contact rod and inside the contact carrier, to a second location or region, located on the side of the contact plate facing the contact carrier and on the outer edge of the contact plate in relation to the first region.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: September 17, 2019
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Lydia Baron, Frank Graskowski, Uwe Jahnke, Andreas Lawall, Ulf Schuemann
  • Publication number: 20190172667
    Abstract: A ceramic insulator for vacuum interrupters extends along a longitudinal extent and forms a cavity in said longitudinal extent. The cavity has a first opening on a first end of the longitudinal extent and a second opening on a second end of the longitudinal extent. The openings are designed so that they can be sealed in a gas-tight manner using appropriate connections. The sealed first opening is designed to guide at least one fixed contact into the cavity, and the sealed second opening is designed to guide at least one moving contact into the cavity. The ceramic insulator has, on an inner face of the cavity, one or multiple electrically conductive discharge path interrupters extending perpendicularly to the longitudinal extent of the ceramic insulator.
    Type: Application
    Filed: July 13, 2017
    Publication date: June 6, 2019
    Inventors: FRANK GRASKOWSKI, ANGELIKA HARTMANN, SYLVIO KOSSE, ANDREAS LAWALL
  • Publication number: 20190043681
    Abstract: A switching contact, of a vacuum interrupter including support bodies, includes an additional support body which has the shape of a truncated cone or of a hollow truncated cone or of a partially hollow truncated cone. The additional support body is offset from a first location or region on the bottom of the contact carrier, located in the notional extension of the contact rod and inside the contact carrier, to a second location or region, located on the side of the contact plate facing the contact carrier and on the outer edge of the contact plate in relation to the first region.
    Type: Application
    Filed: August 19, 2016
    Publication date: February 7, 2019
    Applicant: Siemens Aktiengesellschaft
    Inventors: Lydia BARON, Frank GRASKOWSKI, Uwe JAHNKE, Andreas LAWALL, Ulf SCHUEMANN
  • Publication number: 20160045969
    Abstract: A method produces a component of a vacuum interrupter, such as a cover or a shielding part. These components are produced having a layer of a solder material. According to the method, the coating with the solder material is carried out by thermal spraying, in particular cold gas spraying. The components can be partially coated and only in a partial region. After developing the solder connection, the material flows out of the connection regions into the developing solder connection. Coating by thermal spraying allows larger components, such as housing components, to be partially coated and, in comparison. If electro-thermally silver-coating avoided, a more cost-effective production of the vacuum interrupter is possible.
    Type: Application
    Filed: March 5, 2014
    Publication date: February 18, 2016
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Frank GRASKOWSKI, Andreas LAWALL, Oliver STIER
  • Patent number: 9230760
    Abstract: A vacuum interrupter has a housing with at least a first metal flange through which a first connection pin extends into the vacuum interrupter in a vacuum-tight manner to a first contact. The housing has at least one insulating-material housing region formed by a disc-like insulator. A second connection pin extends into the vacuum interrupter in a vacuum-tight manner to a second contact. The vacuum interrupter can be produced in a cost-effective manner with a compact construction. There is also described a switch pole for a switching device having a vacuum interrupter.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: January 5, 2016
    Assignee: Siemens Aktiengesellschaft
    Inventors: Martin Böttcher, Frank Graskowski, Christoph Luft, Ulf Schümann, Gernot Swiatkowski, Jörg Teichmann
  • Publication number: 20140151339
    Abstract: A vacuum interrupter has a housing with at least a first metal flange through which a first connection pin extends into the vacuum interrupter in a vacuum-tight manner to a first contact. The housing has at least one insulating-material housing region formed by a disc-like insulator. A second connection pin extends into the vacuum interrupter in a vacuum-tight manner to a second contact. The vacuum interrupter can be produced in a cost-effective manner with a compact construction. There is also described a switch pole for a switching device having a vacuum interrupter.
    Type: Application
    Filed: March 20, 2012
    Publication date: June 5, 2014
    Applicant: Siemens Aktiengesellschaft
    Inventors: Martin Böttcher, Frank Graskowski, Christoph Luft, Ulf Schümann, Gernot Swiatkowski, Jörg Teichmann