Patents by Inventor Hans-Peter Kramer

Hans-Peter Kramer 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).

  • Publication number: 20230282431
    Abstract: A short-circuit current limiter has a vacuum switch in a main current path and a current-limiting unit connected in parallel therewith in a commutation current path. The vacuum switch has switching contacts. A material of contact pieces of the switching contacts is selected such that a mean value of the chopping current is at least 8 amperes.
    Type: Application
    Filed: May 5, 2021
    Publication date: September 7, 2023
    Inventors: Hans-Peter Krämer, Christian Schacherer, Erik D Taylor
  • Publication number: 20190131043
    Abstract: Various embodiments may include an electric coil winding comprising: an electric conductor; a non-conductive element wound in parallel to the electric conductor throughout a number of turns forming a coil; and a first retaining element arranged in a first end region of the coil. The non-conductive element may be mechanically secured to the retaining element by means an elastic tensile element.
    Type: Application
    Filed: April 6, 2017
    Publication date: May 2, 2019
    Applicant: Siemens Aktiengesellschaft
    Inventors: Anne Bauer, Hans-Peter Krämer, Manfred Wohlfart
  • Patent number: 8600463
    Abstract: A conductor arrangement for a resistive switching element, has at least first and second conductor connections disposed in a mutual plane adjacent to each other and insulated against each other. The composite conductors each have two conductor parts extending parallel, and forming a bifilar construction. The conductor parts are constructed from at least one superconducting conductor band. The composite conductors are formed into a coil winding, wherein the windings thereof substantially extend in the manner of a spiral, and are insulated against each other by a spacer.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: December 3, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventor: Hans-Peter Krämer
  • Patent number: 8485254
    Abstract: A method for the in situ extraction of bitumen or very heavy oil from oil sand deposits close to the surface, where thermal energy is introduced into the deposit to reduce the viscosity of the bitumen or very heavy oil is provided. Condensed water is used that is introduced into the deposit via an injection pipe and is horizontally conducted inside the pipe within the deposit such that the water can evaporate in situ and the heat can be applied to the deposit. An apparatus including an injection pipe, an extraction pipe, a converter and electrical conductors are also provided.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: July 16, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Norbert Huber, Hans-Peter Krämer
  • Patent number: 8255024
    Abstract: Between adjacent windings of a bifilar coil made of an HTS strip conductor in a resistive superconductive current limiter device, a spacer is provided which is transparent for a coolant. The spacer includes an electrically insulating support tape for sufficiently massive spacer elements attached thereon. The spacer elements are spaced and made of a material having high thermal conductivity. The spaces between the spacer elements form cooling channels for the coolant.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: August 28, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hans-Peter Krämer, Wolfgang Schmidt
  • Patent number: 8113281
    Abstract: A method to extract bitumen or very heavy oil in situ from oil sand seams close to the Earth's surface is provided. Energy is introduced via at least two pipes at a given, repeatable distance from the seam, a predefined geometry is maintained in relation to the well pair. The associated apparatus includes at least one additional pipe which is alternatively designed as an electrode or also for feeding vapor and is placed above the injection pipe.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: February 14, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Dirk Diehl, Norbert Huber, Hans-Peter Krämer
  • Patent number: 8112134
    Abstract: The superconducting current-limiting device contains at least one coil (61), the conductive track of which is formed from at least one band-shaped superconductor (17), where a holding element (2, 41, 10, 51, 62) is located between adjacent coil windings. The holding element (2, 41, 51, 62) is constructed wider than the superconductor (17) in the axial direction of the coil (61). The holding element (2, 41, 51, 62) further includes a flat strip (11) and an undulating strip (12, 42, 52). The flat strip (11) extends essentially parallel to the band-shaped superconductor (17) at an essentially constant distance (22) therefrom. The undulating strip (12, 42, 52) extends essentially parallel to the flat strip (11), and in the longitudinal direction periodically has regions (15, 43, 53) distant from and regions (13) close to the flat strip (11). The regions (13) of the undulating strip (12, 42, 52) near to the flat strip have a mechanical connection (21) to the flat strip (11).
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: February 7, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hans-Peter Krämer, Manfred Wohlfart
  • Patent number: 8091632
    Abstract: A device for the in-situ extraction of a hydrocarbon-containing substance, while reducing the viscosity thereof, from an underground deposit, has at least one injection pipeline extending in the deposit and at least one production pipeline leading out of the deposit, which together form a so-called well pair. The injection and production pipelines each have a starting region extending above ground in some areas, and an active region connecting to the starting region inside the deposit. With the method, during a heating phase hot steam is applied to the injection and production pipelines, while during a production phase hot steam is applied only to the injection pipeline. Furthermore, the active region of the injection pipeline is additionally configured as an induction heater regarding the surrounding area in the deposit. In the associated device, for example, the well pair formed by the injection pipeline and production pipeline can be configured as electrodes.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: January 10, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Dirk Diehl, Norbert Huber, Hans-Peter Krämer
  • Patent number: 7981841
    Abstract: The conductive path of the current-limiting device is made of a strip-shaped super conductor, whereby the structure thereof has a metallic strip, at least one oxidic buffer, a type AB2Cu3Ox super conductive layer and a metal cover layer which is arranged thereon. An intrinsically stable bifilar coil is embodied with said super conductor, and a distance is maintained between adjacent coil windings, wherein a distance maintainer is arranged which is transparent to the coolant.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: July 19, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hans-Peter Krämer, Wolfgang Schmidt
  • Publication number: 20110116198
    Abstract: A conductor arrangement for a resistive switching element, has at least first and second conductor connections disposed in a mutual plane adjacent to each other and insulated against each other. The composite conductors each have two conductor parts extending parallel, and forming a bifilar construction. The conductor parts are constructed from at least one superconducting conductor band. The composite conductors are formed into a coil winding, wherein the windings thereof substantially extend in the manner of a spiral, and are insulated against each other by a spacer.
    Type: Application
    Filed: April 9, 2009
    Publication date: May 19, 2011
    Inventor: Hans-Peter Krämer
  • Publication number: 20110108273
    Abstract: A method for the in situ extraction of bitumen or very heavy oil from oil sand deposits close to the surface, where thermal energy is introduced into the deposit to reduce the viscosity of the bitumen or very heavy oil is provided. Condensed water is used that is introduced into the deposit via an injection pipe and is horizontally conducted inside the pipe within the deposit such that the water can evaporate in situ and the heat can be applied to the deposit. An apparatus including an injection pipe, an extraction pipe, a converter and electrical conductors are also provided.
    Type: Application
    Filed: August 19, 2008
    Publication date: May 12, 2011
    Inventors: Norbert Huber, Hans-Peter Krämer
  • Publication number: 20110042085
    Abstract: A method to extract bitumen or very heavy oil in situ from oil sand seams close to the Earth's surface is provided. Energy is introduced via at least two pipes at a given, repeatable distance from the seam, a predefined geometry is maintained in relation to the well pair. The associated apparatus includes at least one additional pipe which is alternatively designed as an electrode or also for feeding vapor and is placed above the injection pipe.
    Type: Application
    Filed: August 19, 2008
    Publication date: February 24, 2011
    Inventors: Dirk Diehl, Norbert Huber, Hans-Peter Krämer
  • Patent number: 7879762
    Abstract: A superconductor has a conductive path with a metallic substrate strip, a super-conductive layer made of a AB2CU3Ox type high-Tc-super conductive material, at least one insulating buffer layer which is arranged therebetween, and a metallic cover layer which is arranged thereon. At least one contacting element made of a normal conductive contacting material and arranged at least on one longitudinal side of the structure between the cover layer and the substrate strip enables a predetermined normally conductive limitation of the current-limiting device to be obtained.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: February 1, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hans-Peter Krämer, Wolfgang Schmidt
  • Patent number: 7772158
    Abstract: The resistive current-limiting device contains a strip-shaped superconductor having a conductive structure which is made of a metallic substrate strip, an insulating, oxidic buffer layer, a super-conductive layer made of a type AB2Cu3Ox oxidically high-Tc-super conductive material, an insulating buffer layer which is arranged therebetween, and a metal cover layer. At least one of the lateral edges of the conductive structure is mechanically deformed such that the cover layer and the substrate strip are arranged in electric contact.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: August 10, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hans-Peter Krämer, Wolfgang Schmidt
  • Publication number: 20100108318
    Abstract: A device for the in-situ extraction of a hydrocarbon-containing substance, while reducing the viscosity thereof, from an underground deposit, has at least one injection pipeline extending in the deposit and at least one production pipeline leading out of the deposit, which together form a so-called well pair. The injection and production pipelines each have a starting region extending above ground in some areas, and an active region connecting to the starting region inside the deposit. With the method, during a heating phase hot steam is applied to the injection and production pipelines, while during a production phase hot steam is applied only to the injection pipeline. Furthermore, the active region of the injection pipeline is additionally configured as an induction heater regarding the surrounding area in the deposit. In the associated device, for example, the well pair formed by the injection pipeline and production pipeline can be configured as electrodes.
    Type: Application
    Filed: February 1, 2008
    Publication date: May 6, 2010
    Inventors: Dirk Diehl, Norbert Huber, Hans-Peter Krämer
  • Publication number: 20090286685
    Abstract: Between adjacent windings of a bifilar coil made of an HTS strip conductor in a resistive superconductive current limiter device, a spacer is provided which is transparent for a coolant. The spacer includes an electrically insulating support tape for sufficiently massive spacer elements attached thereon. The spacer elements are spaced and made of a material having high thermal conductivity. The spaces between the spacer elements form cooling channels for the coolant.
    Type: Application
    Filed: June 21, 2007
    Publication date: November 19, 2009
    Inventors: Hans-Peter Krämer, Wolfgang Schmidt
  • Publication number: 20090264294
    Abstract: The superconducting current-limiting device contains at least one coil (61), the conductive track of which is formed from at least one band-shaped superconductor (17), where a holding element (2, 41, 10 51, 62) is located between adjacent coil windings. The holding element (2, 41, 51, 62) is constructed wider than the superconductor (17) in the axial direction of the coil (61). The holding element (2, 41, 51, 62) further includes a flat strip (11) and an undulating strip (12, 42, 52). The flat strip (11) extends essentially parallel to the band-shaped superconductor (17) at an essentially constant distance (22) therefrom. The undulating strip (12, 42, 52) extends essentially parallel to the flat strip (11), and in the longitudinal direction periodically has regions (15, 43, 53) distant from and regions (13) close to the flat strip (11). The regions (13) of the undulating strip (12, 42, 52) near to the flat strip have a mechanical connection (21) to the flat strip (11).
    Type: Application
    Filed: June 21, 2007
    Publication date: October 22, 2009
    Inventors: Hans-Peter Kramer, Manfred Wohlfart
  • Publication number: 20080108505
    Abstract: A strip-shaped superconductor has a conductor structure containing at least one metallic substrate strip, a layer made of oxidic high Tc superconducting material of the AB2Cu3OX type; an oxidic buffer layer, which is arranged therebetween and which has adapted crystalline dimensions, and; a normal-conductive top layer that is applied to the superconductive layer. The buffer layer should be formed so that a transition resistance of no greater than 10?3 ?cm2 is formed at least in partial areas between the superconductive layer and the substrate strip. For example, suitable materials are of the La—Mn—O or Sr—Ru—O or La—Ni—O or In—Sn—O type.
    Type: Application
    Filed: September 27, 2005
    Publication date: May 8, 2008
    Inventors: Hans-Peter Kramer, Wolfgang Schmidt
  • Publication number: 20080070788
    Abstract: The conductive path of the current-limiting device is made of a strip-shaped super conductor, whereby the structure thereof has a metallic strip, at least one oxidic buffer, a type AB2Cu3Ox super conductive layer and a metal cover layer which is arranged thereon. An intrinsically stable bifilar coil is embodied with said super conductor, and a distance is maintained between adjacent coil windings, wherein a distance maintainer is arranged which is transparent to the coolant.
    Type: Application
    Filed: September 27, 2005
    Publication date: March 20, 2008
    Inventors: Hans-Peter Kramer, Wolfgang Schmidt
  • Publication number: 20070254813
    Abstract: A superconductor has a conductive path with a metallic substrate strip, a super-conductive layer made of a AB2CU3Ox type high-Tc-super conductive material, at least one insulating buffer layer which is arranged therebetween, and a metallic cover layer which is arranged thereon. At least one contacting element made of a normal conductive contacting material and arranged at least on one longitudinal side of the structure between the cover layer and the substrate strip enables a predetermined normally conductive limitation of the current-limiting device to be obtained.
    Type: Application
    Filed: September 27, 2005
    Publication date: November 1, 2007
    Inventors: Hans-Peter Kramer, Wolfgang SChmidt