Patents by Inventor Stefan Keller

Stefan Keller 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: 20160190901
    Abstract: A method of constructing an electrical machine by assembling a first structure (one of a rotor and stator structure) and a second structure (the other of the rotor and stator structure), along with a plurality of first elements (one of a plurality of permanent magnet elements and a plurality of winding elements) and a plurality of second elements (the other plurality of the permanent magnet elements and winding elements). The first elements are attached to a rim of the first structure, and the second elements are attached to the first elements, this attachment being caused by a magnetic attraction. The first structure is assembled with the second structure such that the second elements are positioned for a posterior attachment to a rim of the second structure, and the second elements are attached to the rim of the second structure.
    Type: Application
    Filed: December 16, 2015
    Publication date: June 30, 2016
    Inventor: Stefan KELLER
  • Patent number: 9318929
    Abstract: An electric machine has a stator which carries a polyphase coil winding, wherein coil ends are connected in a predetermined manner to a plurality of electric connection conductors. The electric machine comprises a power connection unit having a plurality of terminal conductors which are constructed separate from the connection conductors and which by a first end portion are bondingly connected or connectable to the connection conductors and by a second end portion are connected or connectable to the electrical energy source. The power connection unit is constructed as a plastic composite element, in which the terminal conductors are embedded at least over a portion of their length in a plastic shell so as to be spaced apart from one another, and wherein first end portions of the terminal conductors project out of the plastic shell.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: April 19, 2016
    Assignee: ZF Friedrichshafen AG
    Inventors: Alexander Schäflein, Matthias Weidner, Udo Niehaus, Matthias Cudok, Christian Brückner, Stefan Keller
  • Patent number: 9191881
    Abstract: The present invention describes a wireless network, in particular for automation, realtime and/or industrial applications, having at least two access network nodes and at least one radio station for wireless communication with at least one of the at least two access network nodes, wherein each of the at least two access network nodes uses a data channel selected from a set of available selectable data channels for wireless communication with a radio station assigned to it in each case, wherein a control communication channel which is distinct from the selectable data channels is provided in addition, and each of the at least two access network nodes is embodied for wirelessly sending information messages over the control communication channel and the at least one radio station is embodied for receiving the control communication channel.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: November 17, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventors: Kai Benjamins, Stefan Keller, Jörg Müller, Martin Ober, Stephan Wolf
  • Publication number: 20150308592
    Abstract: The present invention relates to a connecting apparatus for creating a connection to a measuring instrument or to a valve block/valve with a measuring instrument, and a connection to a pipeline or to a metering orifice device installed in a pipeline. The connecting apparatus comprises: a first connecting device that provides a direct or indirect sealing connection to the pipeline or to the metering orifice device with a first recess extending through in the longitudinal direction, and a second connecting device that provides a direct or indirect sealing connection to the measuring instrument or to the valve block/valve with a second recess extending through in the longitudinal direction. The first and second connecting devices are interconnected with sealing effect. The connecting unit is designed so that the sealing connection can be created solely by rotation of the connecting unit without rotating the first and second connecting devices.
    Type: Application
    Filed: April 23, 2015
    Publication date: October 29, 2015
    Applicant: ARMATURENFABRIK FRANZ SCHNEIDER GMBH + CO. KG
    Inventors: Stefan KELLER, Markus HÄFFNER
  • Publication number: 20150299853
    Abstract: A depositing arrangement for evaporation of a material including an alkali metal or alkaline earth metal, and for deposition of the material on a substrate (4) is described. The arrangement a first chamber (110) configured for liquefying the material, a valve (130) being in fluid communication with the first chamber, and being downstream of the first chamber, wherein the valve is configured for control of the flow rate of the liquefied material through the valve, an evaporation zone (114) being in fluid communication with the valve, and being downstream of the valve, wherein the evaporation zone is configured for vaporizing the liquefied material, and one or more outlets (116) for directing the vaporized material towards the substrate.
    Type: Application
    Filed: December 20, 2013
    Publication date: October 22, 2015
    Applicant: Applied Materials, Inc.
    Inventors: Stefan KELLER, Uwe SCHÜSSLER, Jose Manuel DIEGUEZ-CAMPO, Stefan BANGERT, Leo KWAK BYUNG-SUNG
  • Publication number: 20150284841
    Abstract: A depositing arrangement for evaporation of a dielectric material onto a substrate is described. The deposition arrangement a vapor distribution showerhead, a holder for providing the dielectric material in the vapor distribution showerhead, wherein the holder has a feeding unit for feeding the dielectric material into the vapor distribution showerhead, an energy source configured for melting and evaporating the dielectric material in the vapor distribution showerhead or sublimating the dielectric material in the vapor distribution showerhead, wherein the vapor distribution showerhead has one or more outlets for directing the vaporized dielectric material towards a substrate, and particularly wherein the energy source emits electrons or photons, wherein the electrons or photons melt and evaporate the dielectric material or sublimate the dielectric material. The arrangement further includes a plasma source configured for providing a plasma between the vapor distribution showerhead and the substrate.
    Type: Application
    Filed: December 20, 2013
    Publication date: October 8, 2015
    Inventors: Stefan KELLER, Stefan BANGERT, Leo KWAK BYUNG-SUNG
  • Publication number: 20150224556
    Abstract: The invention relates to a method for forming an aluminium composite material which has a core alloy made from an aluminium alloy of type AA5xxx or AA6xxx and at least one outer aluminium alloy layer provided on one or both sides, wherein the aluminium composite material is formed and the outer aluminium alloy layer provided on one or both sides has a yield strength Rp0.2 of 25 MPa to 60 MPa in the soft or solution-annealed state. The method enables the production of large-surface, heavily formed aluminium alloy sheet metal parts, in particular also in outer skin quality.
    Type: Application
    Filed: April 27, 2015
    Publication date: August 13, 2015
    Applicant: HYDRO ALUMINIUM ROLLED PRODUCTS GMBH
    Inventors: Henk-Jan Brinkman, Stefan Keller, Olaf Engler, Natalie Hörster, Dietmar Schröder, Holger Aretz
  • Publication number: 20140360016
    Abstract: A method of manufacturing an exhaust gas carrying device, in particular an exhaust gas purification device, and a tool provided therefor include segment-like jaws that are used to deforma an outer housing. The jaws have indentations or projections adjacent to each other, and which are complementary to form a continuously surrounding indentation/projection. The reshaped outer housing is provided with one or more surrounding projections or indentations by the deformation.
    Type: Application
    Filed: August 27, 2014
    Publication date: December 11, 2014
    Inventors: Stefan Keller, Stefan Meischkoetter, Otto Steinhauser, Manfred Stiglmaier
  • Patent number: 8857056
    Abstract: A method of manufacturing an exhaust gas carrying device, in particular an exhaust gas purification device, and a tool provided therefor include segment-like jaws that are used to deform an outer housing. The jaws have indentations or projections adjacent to each other, and which are complementary to form a continuously surrounding indentation/projection. The reshaped outer housing is provided with one or more surrounding projections or indentations by the deformation.
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: October 14, 2014
    Assignee: Faurecia Emissions Control Technologies, Germany GmbH
    Inventors: Stefan Keller, Stefan Merschkoetter, Otto Steinhauser, Manfred Stiglmaier
  • Patent number: 8709537
    Abstract: Methods for depositing films using hot wire chemical vapor deposition (HWCVD) processes are provided herein. In some embodiments, a method of operating an HWCVD tool may include providing hydrogen gas (H2) to a filament disposed in a process chamber of the HWCVD tool for a first period of time; and flowing current through the filament to raise the temperature of the filament to a first temperature after the first period of time.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: April 29, 2014
    Assignee: Applied Materials, Inc.
    Inventors: Bipin Thakur, Joe Griffith Cruz, Stefan Keller, Vikas Gujar, Ravindra Janu Patil
  • Patent number: 8711808
    Abstract: A method for switching channels in a wireless communication network comprising at least one access point and clients, wherein the communication network as secondary user uses one of a number of possible channels for data communication. In accordance with the invention, data communication occurs between the access point and the number of clients through the first transmit/receive interface of the access point on a first channel. Parallel to the data communication, a check of the possible channels occurs over the transmit/receive interface by a second transmit/receive interface of the access point to determine which of the channels are free channels that are not being used by any primary users. A channel switch from the first channel to one of the free channels occurs if a prioritized use of the first channel by a primary user is established by the access point of the communication network.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: April 29, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Anja Adling, Wolfgang Bölderl-Ermel, Stefan Keller
  • Publication number: 20140086136
    Abstract: A redundantly operated industrial communication system includes communication devices that are redundantly linked to an industrial communication network and includes network infrastructure devices associated with the industrial communication network, wherein message transmission occurs wirelessly at least in sections. The industrial communication network contains a plurality of buffer memory units for message elements that are received at a network node by wire and message elements that are to be sent by the network node wirelessly. When a maximum buffer size is exceeded, an oldest message element situated in a respective buffer memory unit is erased. Until the maximum buffer size is exceeded, the oldest message element is selected as the next message element to be sent wirelessly.
    Type: Application
    Filed: September 23, 2013
    Publication date: March 27, 2014
    Inventors: Hermann Angst, Stefan Keller, Siegfried Kühnel, Henryk Lumpp, Martin Schneider
  • Publication number: 20140050865
    Abstract: A coating apparatus (700) is provided including: (i) a vacuum chamber (16) for coating a substrate (12) with coating material heated by a wire (14); and (ii) an actuator system (18) including a motorised drive (20). The actuator system is configured for tensioning the wire (14) during the coating. Furthermore, a method of manufacturing a coated substrate (12) is provided including: (i) tensioning a wire (14) by an actuator system (18) including a motorised drive; and (ii) coating the substrate (12) with a coating material (28), the coating being under vacuum conditions. The coating includes heating at least a portion (14a) of the wire (14) to an operating temperature for inducing a temperature increase in the coating material before the coating material is deposited over substrate (12).
    Type: Application
    Filed: March 22, 2011
    Publication date: February 20, 2014
    Applicant: APPLIED MATERIALS, INC.
    Inventors: Stefan Bangert, Werner Guhr, Stefan Keller, Michael König
  • Patent number: 8498279
    Abstract: A data communication system includes an access point and a plurality of stations each for exchanging wireless data communication messages with the access point. At least some of the messages are in a format that includes at least one message header and a plurality of data units. Each of the data units includes a respective data unit header and a respective data frame. Each data unit header identifies a respective one of the stations as a recipient to receive the respective data frame of the data unit.
    Type: Grant
    Filed: June 9, 2008
    Date of Patent: July 30, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Raymond Liao, Raghuveer Chereddy, Joerg Mueller, Stefan Keller, Kai Benjamins, Christoph Weiler
  • Patent number: 8411663
    Abstract: A data communication system includes an access point and a plurality of stations each for exchanging wireless data communication messages with the access point. At least some of the messages are in a format that includes at least one message header and a plurality of data units. Each of the data units includes a respective data unit header and a respective data frame. Each data unit header identifies a respective one of the stations as a recipient to receive the respective data frame of the data unit.
    Type: Grant
    Filed: June 9, 2008
    Date of Patent: April 2, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Raymond Liao, Raghuveer Chereddy, Joerg Mueller, Stefan Keller, Kai Benjamins, Christoph Weiler
  • Patent number: 8373803
    Abstract: The invention relates to a multistandard receiver circuit for analogue and digital broadcasting, particularly analogue and digital television broadcasting, having a demodulator arrangement with an input for applying digital or digitized values (d) for both analogue and digital broadcasting signals from a tuner (1) and with components and/or an algorithm for processing the values (d). Emphasis should be given to an embodiment and/or controller for processing the values (d) for all processing steps which are to be performed in the field of intermediate-frequency processing with shared components.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: February 12, 2013
    Assignee: Entropic Communications, Inc.
    Inventors: Stefan Keller, Hans Stoorvogel, Erik Venema
  • Publication number: 20120313460
    Abstract: An electric machine has a stator which carries a polyphase coil winding, wherein coil ends are connected in a predetermined manner to a plurality of electric connection conductors. The electric machine comprises a power connection unit having a plurality of terminal conductors which are constructed separate from the connection conductors and which by a first end portion are bondingly connected or connectable to the connection conductors and by a second end portion are connected or connectable to the electrical energy source. The power connection unit is constructed as a plastic composite element, in which the terminal conductors are embedded at least over a portion of their length in a plastic shell so as to be spaced apart from one another, and wherein first end portions of the terminal conductors project out of the plastic shell.
    Type: Application
    Filed: May 22, 2012
    Publication date: December 13, 2012
    Applicant: ZF Friedrichshafen AG
    Inventors: Alexander SCHÄFLEIN, Matthias Weidner, Udo Niehaus, Matthias Cudok, Christian Brückner, Stefan Keller
  • Patent number: 8276566
    Abstract: A method for operating a fuel injection system of a motor vehicle in particular is described. The fuel injection system has a fuel accumulator, capable of receiving fuel via a metering unit. In the method, an actual pressure in the fuel accumulator is affected by an I regulator, among other things. A precontrol value is generated by a precontrol characteristic map, which is used for compensating manufacturing-related differences in the components of the fuel injection system.
    Type: Grant
    Filed: August 18, 2005
    Date of Patent: October 2, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Peter Horstmann, Stefan Keller
  • Publication number: 20120100312
    Abstract: Methods for depositing films using hot wire chemical vapor deposition (HWCVD) processes are provided herein. In some embodiments, a method of operating an HWCVD tool may include providing hydrogen gas (H2) to a filament disposed in a process chamber of the HWCVD tool for a first period of time; and flowing current through the filament to raise the temperature of the filament to a first temperature after the first period of time.
    Type: Application
    Filed: October 6, 2011
    Publication date: April 26, 2012
    Applicant: APPLIED MATERIALS, INC.
    Inventors: BIPIN THAKUR, JOE GRIFFITH CRUZ, STEFAN KELLER, VIKAS GUJAR, RAVINDRA JANU PATIL
  • Patent number: 8125955
    Abstract: A data communication system includes an access point and a plurality of stations each for exchanging wireless data communication messages with the access point. At least some of the messages are in a format that includes at least one message header and a plurality of data units. Each of the data units includes a respective data unit header and a respective data frame. Each data unit header identifies a respective one of the stations as a recipient to receive the respective data frame of the data unit.
    Type: Grant
    Filed: June 9, 2008
    Date of Patent: February 28, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Raymond Liao, Raghuveer Chereddy, Joerg Mueller, Stefan Keller, Kai Benjamins, Christoph Weiler