Patents by Inventor Stefan Stark

Stefan Stark 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: 11562221
    Abstract: An optical synapse comprises a memristive device for non-volatile storage of a synaptic weight dependent on resistance of the device, and an optical modulator for volatile modulation of optical transmission in a waveguide. The memristive device and optical modulator are connected in control circuitry which is operable, in a write mode, to supply a programming signal to the memristive device to program the synaptic weight and, in a read mode, to supply an electrical signal, dependent on the synaptic weight, to the optical modulator whereby the optical transmission is controlled in a volatile manner in dependence on programmed synaptic weight.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: January 24, 2023
    Assignee: International Business Machines Corporation
    Inventors: Stefan Abel, Bert Jan Offrein, Antonio La Porta, Pascal Stark
  • Publication number: 20230006118
    Abstract: In an embodiment an optoelectronic device includes a carrier and a plurality of semiconductor chips fastened on the carrier by a connector, wherein each semiconductor chip has at least one contact pad on a main surface facing away from the carrier, wherein each contact pad is contacted electrically by an interconnecting track, and wherein the interconnecting track is guided over an edge of the main surface of the semiconductor chip onto the carrier.
    Type: Application
    Filed: November 30, 2020
    Publication date: January 5, 2023
    Inventors: Hermann Nuss, Andreas Dobner, Bjoern Hoxhold, Andreas Waldschik, Erwin Beer, Bernd Boehm, Ludwig Hofbauer, Stefan Merl, Stefan Rass, Matthias Stark
  • Publication number: 20220393601
    Abstract: The invention relates to an isolated resonant primary side switched converter (100), comprising a galvanic isolation stage (105), an auxiliary winding (L51-c) on the primary side (101) of the isolation stage (105) which is magnetically coupled to at least one secondary side winding (L51-b, L51-d) of the isolation stage (105), wherein the auxiliary winding (L51-c) is configured to detect a feedback signal as to a secondary side voltage, and a control unit (107) configured to sample the feedback signal, in each or every nth switching cycle, during a sampling period in which a current is flowing on the secondary side (103) of the isolation stage (105), and to process the sampled signal for a feedback control of the secondary side voltage by controlling the switching operation of a primary side switch (M40, M41).
    Type: Application
    Filed: November 5, 2020
    Publication date: December 8, 2022
    Applicant: Tridonic GmbH & Co KG
    Inventors: Harald Netzer, Stefan Stark
  • Publication number: 20220377860
    Abstract: The invention relates to an LED-driver, comprising an actively switched PFC circuitry and a bus interface for a wire-bound bus, wherein a voltage supply for the bus interface for powering the bus is tapped off the output voltage of the active PFC circuitry, further comprising a control circuitry for a feedback control of an output voltage of the actively switched PFC by controlling a switch of the PFC, wherein the time constant of the feedback control of the control circuitry is faster during time periods in which the bus interface is transmitting or receiving signals, compared to time periods without activity.
    Type: Application
    Filed: November 10, 2020
    Publication date: November 24, 2022
    Applicant: Tridonic GmbH & Co KG
    Inventors: Hans Auer, Clemens Kucera, Lukas Saccavini, Stefan Stark
  • Publication number: 20220312564
    Abstract: The invention relates to a synchronous flyback converter (100) having terminals for supplying an LED load. The synchronous flyback converter (100) comprises a sensing winding (Lw)coupled to a primary winding (Lp) of a transformer T of the flyback converter (100), a control unit (106) controlling a primary side switch (S1) in series to the primary winding (Lp) of the flyback converter (100) using a feedback signal for a closed loop control of a secondary side voltage of the flyback converter (100) by controlling the frequency and/or duty cycle of the switching of the primary side switch (S1), wherein the feedback signal is derived from a sensing voltage across the sensing winding (Lw) sampled once during a switch-on time of a secondary side switch (S2) of the flyback converter (100).
    Type: Application
    Filed: June 29, 2020
    Publication date: September 29, 2022
    Applicant: Tridonic GmbH & Co KG
    Inventors: Lukas Saccavini, Stefan Stark, Ludwig Erasmus De Clercq
  • Publication number: 20220202574
    Abstract: The disclosure relates to a system comprising a foam structure and a surgical fixation device for attaching the foam structure to bone, the foam structure comprising: a porous body made of at least one biocompatible implant material, wherein the porous body is coated with a coating, which is capable of stimulating bone ingrowth.
    Type: Application
    Filed: December 30, 2021
    Publication date: June 30, 2022
    Inventors: Sven Martin Kuhn, Tobias Stark, Miriam Ruhr, Stefan Gutzeit
  • Publication number: 20220141933
    Abstract: The invention relates to an LLC stage for an LED driver (100), comprising a half bridge or full-bridge circuit (100a) comprising two switches (M40, M41), connected in series, a control circuitry (100e), such as e.g. a microcontroller or ASIC, for controlling switching operations of the switches (M40, M41), wherein the control circuitry (100e) for switches is arranged to monitor the middle point voltage between the two switches (M40, M41) and enables the switch on of one of the switches (M40, M41) only if the middle point voltage meets defined criteria. The control circuitry (100e) is designed to issue an error signal, if a dead time, during which both switches are non-conducting and resulting from the monitoring of the midpoint voltage, is greater than a preset threshold value.
    Type: Application
    Filed: April 1, 2020
    Publication date: May 5, 2022
    Applicant: TRIDONIC GMBH & CO KG
    Inventors: Harald Netzer, Stefan Stark
  • Publication number: 20220110245
    Abstract: The present disclosure relates to a height adjustment device (1) comprising a height adjustment screw (3) having outer threads (5) and being oriented substantially vertically and arranged rotatably in relation to a chassis (7), and an adjustment nut (9) connected to a bracket (11) and comprising inner threads (13) for engagement with the threads (5) of the adjustment screw (3), such that a rotary movement of the height adjustment screw (3) results in a vertical linear movement of the bracket (11). The adjustment nut comprises a first part (15) and a second part (17) which together enclose the adjustment screw (3), wherein the first part (15) being adapted to be attached to the second part. The present disclosure also considers a robotic mower (101) comprising such a height adjustment device.
    Type: Application
    Filed: October 8, 2021
    Publication date: April 14, 2022
    Inventors: Jörgen Johansson, Stefan Stark, Lars Ederfors
  • Publication number: 20210388905
    Abstract: A sealing member (2), for waterproof sealing of a volume, comprises a hollow, generally cylindrical body and a sealing area (5a, 5b) at the respective axial ends thereof. At least one sealing area (5a) comprises a first radially extending portion (6) and a second portion (7) extending in a reverse direction partly overlapping the first portion. The second portion (7) has a free end and is arranged for pressing towards the first portion (6), thereby forming a seal with the first portion (6). A sealing system comprises a sealing member (2) as above, a sealing seat (9) for abutment against the sealing member (2), and a counterpart surface (11), for pressing the sealing member (2) against the sealing seat (9). The sealing seat (9) comprises an inclined surface (10). A work tool (1) comprising the above-mentioned sealing system has at least one sealing area (5a) of the sealing member (2) pressed between a housing (4) and a chassis (3) of the work tool (1).
    Type: Application
    Filed: May 24, 2021
    Publication date: December 16, 2021
    Inventors: Jörgen Johansson, Stefan Stark, Lars Ederfors
  • Publication number: 20210252688
    Abstract: A power tool (1) is disclosed comprising a tool (3),a power source (5) arranged to power the tool (3),a throttle lever (7),a circuit board (9),and a human machine interface (10) comprising components (15, 17, 19) arranged on the circuit board (9). The power tool (1) further comprises a magnet (11) operably connected to the throttle lever (7), and a sensor arrangement (13) configured to sense the intensity of the magnetic field of the magnet (11). The sensor arrangement (13) is arranged on the circuit board (9).
    Type: Application
    Filed: June 25, 2019
    Publication date: August 19, 2021
    Inventors: Tobias Nyberg, Christian Bylund, Henric lsén, Martin Larsén, Pär-Ola Svensson, Stefan Stark
  • Publication number: 20210235616
    Abstract: A self-propelled robotic lawnmower (1) is disclosed comprising a lawnmower body (3.1, 3.2, 3.3),a body part (5.1, 5.2, 5.3, 5.4, 5.5) movably arranged in relation to the lawnmower body (3.1, 3.2, 3.3), and an elongated sensor element (7, 7) extending in an interface between the lawnmower body (3.1, 3.2, 3.3) and the body part (5.1, 5.2, 5.3, 5.4, 5.5). The elongated sensor element (7, 7?) is configured to generate a signal when a portion of the elongated sensor element (7, 7?) is subjected to a change in thickness in a direction perpendicular to a direction of elongation of the elongated sensor element (7, 7?) by a relative movement between the body part (5.1, 5.2, 5.3, 5.4, 5.5) and the lawnmower body (3.1, 3.2, 3.3).
    Type: Application
    Filed: June 4, 2019
    Publication date: August 5, 2021
    Inventors: Stefan Stark, Svante Larsson, Staffan Palm
  • Publication number: 20210141344
    Abstract: A method that is for manufacturing a timepiece provided with a personalized decoration, visible in particular when the timepiece is worn, includes constructing the timepiece and producing the personalized decoration on all or part of a body of the timepiece. Producing the personalized decoration includes selecting from a human-machine interface of an electronic device a single portion of a reference digital graphical representation, in particular of an ephemeral reference digital graphic representation, and applying a coating of decorative material on all or part of the body of the timepiece as a function of the descriptive characteristics of the selected single portion.
    Type: Application
    Filed: March 25, 2019
    Publication date: May 13, 2021
    Applicant: ETA SA Manufacture Horlogere Suisse
    Inventor: Stefan STARK
  • Patent number: 10954107
    Abstract: A gripper a fuel element, comprises a housing, an inner part arranged inside the housing, the inner part and the housing being displaceable relative to one another in an axial direction, with the inner part movable between a first end position and a second end position, a catch member movable between a gripping position and a release position, a gripper spring between the housing inner part counteracting movement of the inner part from the second end position, or an intermediate position (Z) between the first and second end position, to the first end position, and a damping system comprising a first and second connecting member for connecting the damping system to the housing, inner part and/or the fuel element loading machine, and a spring member arranged on the first and/or the second connecting member counteracting movement of the inner part from an intermediate position (Z) to the second end position.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: March 23, 2021
    Assignee: FRAMATOME GMBH
    Inventors: Peter Forster, Christian Gratz, Stefan Stark
  • Publication number: 20190270619
    Abstract: A gripper a fuel element, comprises a housing, an inner part arranged inside the housing, the inner part and the housing being displaceable relative to one another in an axial direction, with the inner part movable between a first end position and a second end position, a catch member movable between a gripping position and a release position, gripper spring between the housing inner part counteracting movement of the inner part from the second end position, or an intermediate position (Z) between the first and second end position, to the first end position, and a damping system comprising a first and second connecting member for connecting the damping system to the housing, inner part and/or the fuel element loading machine, and a spring member arranged on the first and/or the second connecting member counteracting movement of the inner part from an intermediate position (Z) to the second end position.
    Type: Application
    Filed: August 23, 2017
    Publication date: September 5, 2019
    Inventors: Peter FORSTER, Christian GRATZ, Stefan STARK
  • Publication number: 20190061864
    Abstract: A steering device for small vehicles has a transverse control arm which is situated on a height-adjustable handlebar formed form two telescopic tubes. The inner tube has at least two openings or grooves which are formed at different heights and into which a latching element mounted in the outer tube can latch into position. A height-adjustment and locking device in the form of a clamping sleeve surrounds the two tubes at their connection point and is displaceable along the inner tube in the direction of the outer tube against the force of a spring. The locking device is provided, on its inner side, with a conically tapering end portion which engages around the outer tube and, in the relaxed state of the spring, acts on an outer surface of the latching element, which protrudes radially outward through an opening in the outer tube, and presses the latching element radially inward.
    Type: Application
    Filed: August 28, 2018
    Publication date: February 28, 2019
    Applicant: Brake Force One GmbH
    Inventors: STEFAN STARK, PETER VOITL
  • Patent number: 9631304
    Abstract: A variable timing system for a sewing machine is provided comprising a shuttle hook having a hook tip, a first helical gear mounted on the shuttle hook, a lower shaft configured to rotate the shuttle hook in synchronization with a needle bar, and a second helical gear mounted on the lower shaft and capable of engaging with the first helical gear. In accordance with embodiments, at least one of the helical gears is axially movable. The variable timing system may comprise a control device configured to generate a control signal representative of a current sewing situation. A drive force mechanism may receive the control signal and in response, transmit axial movement to the axially moveable helical gear to move the gear into proper position relative to a threaded needle of the sewing machine.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: April 25, 2017
    Assignee: Singer Sourcing Limited LLC
    Inventors: Bertil Friman, Rolf Wahlström, Kent Askenmalm, Stefan Stark
  • Patent number: D778522
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: February 7, 2017
    Assignee: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
    Inventor: Stefan Stark
  • Patent number: D818238
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: May 15, 2018
    Assignee: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
    Inventor: Stefan Stark
  • Patent number: D818239
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: May 15, 2018
    Assignee: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
    Inventor: Stefan Stark
  • Patent number: RE47046
    Abstract: The invention relates to a closure device (2) for closing a refill opening of a tank such as, a fuel tank or a lubricant tank. The closure device includes a body portion (20) for engagement with the refill opening. The closure device (2) further includes a pivotal member (6) provided with a grip portion (3). The grip portion (3) may be switched between a retracted position and a protruding position. In protruding position, the grip portion (3) extends outwardly of the body portion (20) to form a convenient grip to an operator. A holding member (13, 14, 17) may be provided to hold the pivotal member (6) in the protruding position. The holding member (13, 14, 17) may be secured to the pivotal member (6) and to the body portion (20). The closure device (2) may further comprise a biasing member (11) arranged for urging the pivotal member (6) towards the retracted position.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: September 18, 2018
    Assignee: HUSQVARNA AB
    Inventors: Pär Martinsson, Stefan Stark