Patents Examined by Monica Mata
  • Patent number: 11398594
    Abstract: A bender beam actuator includes a first layer of piezoelectric material and a second layer of piezoelectric material overlying a portion of the first layer of piezoelectric material, where a length of the first layer of piezoelectric material is at least 2% greater than a length of the second layer of piezoelectric material.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: July 26, 2022
    Assignee: Facebook Technologies, LLC
    Inventors: Andrew John Ouderkirk, Katherine Marie Smyth, Spencer Allan Wells, James Ransley, Nagi Elabbasi
  • Patent number: 11381158
    Abstract: A controller (203) comprises a processing system (205) for controlling a power electronic converter during a short circuit taking place in a direct voltage side of the power electronic converter. The processing system recognizes a direction of current in a phase (126-128) of an alternating voltage side of the power electronic converter, sets a high-leg controllable switch (108-110) of the phase to a conductive state while keeping a low-leg controllable switch (111-113) of the phase in a non-conductive state when the recognized direction of the current is outwards from the power electronic converter, and otherwise sets the low-leg controllable switch to the conductive state while keeping the high-leg controllable switch in the non-conductive state. Thermal loadings of freewheeling diodes (114-119) of the power electronic converter are reduced since currents needed to burn input fuses (122) of the power electronic converter are shared between the controllable switches and the freewheeling diodes.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: July 5, 2022
    Assignee: VACON OY
    Inventors: Jani Matti Perkiö, Juha Norrena, Nicklas Jan Anders Södö
  • Patent number: 11374162
    Abstract: A piezoelectric element includes a first electrode; a piezoelectric layer, placed on or above the first electrode, containing potassium, sodium, niobium, titanium, and oxygen; and a second electrode placed on or above the piezoelectric layer.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: June 28, 2022
    Inventors: Koji Sumi, Tomokazu Kobayashi, Tomohiro Sakai, Kazuya Kitada, Koichi Morozumi, Tsutomu Asakawa
  • Patent number: 11353071
    Abstract: A motor brake module for braking a motor is provided. The motor includes a shell, a shaft portion and a driving portion. The motor brake module includes a brake assembly, a block assembly and an armature assembly. The brake assembly includes a shaft hole, plural teeth and plural openings. The shaft portion passes through the shaft hole, and the shaft portion drives the brake assembly to rotate when the shaft portion is rotated. The armature assembly is connected with the block assembly for driving the block assembly to move between the armature assembly and the brake assembly. When the block assembly is moved toward the brake assembly, a portion of the block assembly is contacted with one of the plural teeth and the other portion of the block assembly passes through one of the plural openings.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: June 7, 2022
    Inventors: Chi-Huan Shao, Chi-Shun Chang, Chih-Ming Hsu
  • Patent number: 11329214
    Abstract: A piezoelectric actuator includes a vibration portion, a support portion that is integrally configured with the vibration portion and supports the vibration portion, and a piezoelectric element that is disposed on the vibration portion. The piezoelectric element includes a piezoelectric film including columnar crystal grains extending in a thickness direction. When a thickness of the piezoelectric film is referred to as T [?m] and an average diameter of the crystal grains in the width direction is referred to as D [?m], T/D is within a range of 10 to 100. The thickness T of the piezoelectric film is larger than or equal to 2 ?m. A standard deviation of diameters of the crystal grains in the width direction is less than or equal to 1.8 ?m.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: May 10, 2022
    Inventors: Tomokazu Kobayashi, Mitsumi Kishida, Akio Konishi
  • Patent number: 11316093
    Abstract: A magneto-electric converter capable of converting a variation in magnetic field into a potential difference between two electrical terminals includes a support layer comprising two electrical terminals; a stack disposed on the support layer of a first layer made from a magnetostrictive material defining the reference plane and of a second layer made from a piezoelectric material having a polarization axis in the plane defined by the second layer, parallel to the reference plane; the second layer comprising electrodes; and a means for electrical connection of the electrodes to the electrical terminals.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: April 26, 2022
    Assignee: Enerbee
    Inventors: Jérôme Delamare, Thibault Ricart, Jérémie Guillen
  • Patent number: 11309482
    Abstract: A vibrating element includes a conductive first frame including a first beam portion and a first support portion supporting one end of the first beam portion, a conductive second frame that includes a second beam portion and a second support portion supporting one end of the second beam portion and is disposed separated from the first frame, an oscillating body that is disposed between another end of the first beam portion and another end of the second beam portion and connects the first beam portion and the second beam portion in an insulated state, and a power-consuming member that is installed on the oscillating body and is supplied with power via the first frame and the second frame.
    Type: Grant
    Filed: January 18, 2019
    Date of Patent: April 19, 2022
    Inventor: Yuichiro Masuda
  • Patent number: 11283343
    Abstract: A controller for use in a power converter for transferring energy between an input and an output, the controller comprising a second controller to generate a request event and a request signal in response to a feedback signal and a switching window signal, the second controller to transmit the request event during a switching window of the switching window signal. The second controller comprising an extremum locator switching window generator to generate the switching window corresponding with an extremum in the winding signal and a measurement enable circuit to output an enable signal to enable the extremum locator switching window generator to measure a duration of a half cycle to generate the switching window. The measurement enable circuit to enable the extremum locator switching window generator in response to the feedback signal reaching a percentage of a target reference and output a quiet signal to prevent transmitting the request event.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: March 22, 2022
    Inventors: Edward Er Deng, Feng Tian, Vikram Balakrishnan, Alex B. Djenguerian
  • Patent number: 11268534
    Abstract: A blower wheel is provided with a base member having an axis of rotation and with a rotor of a generator, wherein the rotor is fixedly secured on the blower wheel. At least one magnet is arranged on the rotor. An inertia ring is fixedly secured on the base member at a spacing to the at least one magnet. The inertia ring is made of a first material having a first density and the base member is made of a second material having a second density. The first density is greater than the second density. An internal combustion engine is provided with such a blower wheel.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: March 8, 2022
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Andreas Wolf, Wolfgang Weissert, Volker Lempges, Helmut Zimmermann, Günter Wolf, Holger Vollmer, Marcel Förster, Ute Dawin, Jonas Lank
  • Patent number: 11259124
    Abstract: A transducer of the preferred embodiment including a transducer and a plurality of adjacent, tapered cantilevered beams. Each of the beams define a beam base, a beam tip, and a beam body disposed between the beam base and the beam tip. The beams are arranged such that each of the beam tips extends toward a common area. Each beam is joined to the substrate along the beam base and is free from the substrate along the beam body. A preferred method of manufacturing a transducer can include: depositing alternating layers of piezoelectric and electrode onto the substrate in block, processing the deposited layers to define cantilever geometry in block, depositing metal traces in block, and releasing the cantilevered beams from the substrate in block.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: February 22, 2022
    Assignee: Vesper Technologies Inc.
    Inventors: Karl Grosh, Robert J. Littrell
  • Patent number: 11258004
    Abstract: A transducer device, including an electroactive polymer transducer, which has at least two electrode layers which are situated in parallel to one another and which are connected to one another by inserting an elastic intermediate layer in each case, and including a circuit having electronic components for the purpose of generating an electrical voltage applied to the electrode layers of the polymer transducer, the circuit increasing an input voltage to a voltage which is increased with regard to the input voltage.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: February 22, 2022
    Assignee: Robert Bosch GmbH
    Inventor: Istvan Denes
  • Patent number: 11245066
    Abstract: A shear vibration-based piezoelectric composite material and a preparation method thereof are disclosed. The piezoelectric composite material includes a piezoelectric material and the passive material. The piezoelectric material includes a piezoelectric material polarized along the x-axis positive and a piezoelectric material negatively polarized along the x-axis. The piezoelectric materials in the two polarization directions are alternately arranged along the x-axis direction. The passive material includes a filling layer, a transition layer, and a planar layer. The filling layer is disposed between every two adjacent piezoelectric materials. The planar layer is located outer two surfaces perpendicular to the z-axis of the piezoelectric material. The planar layer on one side is fixedly connected to the filling layer in the odd-numbered position via the transition layer. The planar layer on the other side is fixedly connected to the filling layer in the even-numbered position via the transition layer.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: February 8, 2022
    Assignee: Beijing information Science & Technology University
    Inventors: Lei Qin, Junbo Jia, Likun Wang
  • Patent number: 11224895
    Abstract: Ultrasound devices, and associated methods of assembly thereof, are disclosed whereby an annular electrode array of an ultrasound transducer is electrically connected to a flexible printed circuit board in a compact configuration. The flexible circuit board includes an elongate flexible segment and a distal distribution segment, where the distribution segment is attached to a peripheral support ring that surrounds at least a portion of the ultrasound transducer. The distribution segment includes a plurality of spatially distributed contact pads, and electrical connections are provided between the contact pads and the annular electrodes of the annular array.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: January 18, 2022
    Assignee: Ulthera, Inc.
    Inventors: Jeremy A. Brown, Jeffrey R. Leadbetter, Charles D. Emery
  • Patent number: 11211865
    Abstract: A series capacitor buck converter includes a first half-bridge circuit including a first high side power switch (HSA) and first low side power switch (LSA) connected in series having a first switching node (SWA) therebetween which drives a first output inductor, a second half-bridge circuit including a second HS power switch (HSB) and second LS power switch (LSB) connected in series having a second switching node (SWB) therebetween which drives a second output inductor. A transfer capacitor (Ct) is connected in series with HSA and LSA and between the first and second half-bridge circuits. A first current source is coupled for precharging Ct with a charging current (I_in) and a second current source is coupled to Ct for providing an output current (I_out). A feedback network providing negative feedback forces I_out to match I_in.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: December 28, 2021
    Inventors: Joseph Maurice Khayat, Sergio Carlo-Rodriquez, Michael G. Amaro, Ramanathan Ramani, Pradeep S. Shenoy
  • Patent number: 11205959
    Abstract: A switching regulator has an error amplifier supplying an error current, a phase compensation portion generating an error voltage, a clamper clamping the error voltage, a PFM detector supplying a comparison result signal of a first level or a comparison result signal of a second level based on the error current, an oscillator supplying a clock signal in response to the comparison result signal at the second level and fixing the clock signal in response to the comparison result signal at the first level, and a PWM converter turning on/off a switching element with a desired pulse width based on the error voltage and the output from the oscillator.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: December 21, 2021
    Assignee: ABLIC INC.
    Inventor: Kosuke Takada
  • Patent number: 11195655
    Abstract: Techniques are provided for segmented windings of a coupled inductor within a DC-DC voltage converter or regulator. In an example, a coupled inductor circuit can include a first winding comprising a conductive coil having a central axis, and a second winding configured to magnetically couple with the first winding. The second winding can have a plurality of individual segments. Each individual segment can form a fraction of one turn of the second winding. Each segment can include a first conductor, a ground conductor, and a first switch to selectively couple, and selectively isolate, the first conductor and the ground conductor.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: December 7, 2021
    Assignee: Analog Devices International Unlimited Company
    Inventor: Jonathan Paolucci
  • Patent number: 11183931
    Abstract: To provide a power converter which can maintain the stability and the response of the feedback control system, even if the frequency characteristic of the chopper circuit changes according to change of driving condition. A power converter is provided with a chopper circuit which has reactor and switching device; and a control circuit which changes a feedback value of duty ratio of the switching device so that a deviation between a target value of output voltage and a detection value of output voltage approaches to 0, wherein the control circuit changes a frequency characteristic of the feedback control, based on at least any two or more of information on the output voltage, information on an input voltage, and information on duty ratio.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: November 23, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuya Tanaka, Akinu Nakabayashi, Tomoyuki Taniguchi, Shingo Kato, Matahiko Ikeda, Takashi Kaneyama
  • Patent number: 11183928
    Abstract: A novel method to operate a switching regulator is presented. The method includes the generation of at least two reference signals. A first reference signal is a constant DC voltage signal and a second reference signal is a periodic ramp sawtooth signal at a given frequency. It also includes the generation of a feedback signal by using the output voltage of the switching regulator. In one method, a capacitor is either charged by a bias current or discharged by a switch. A first comparator is configured to compare a first constant DC reference voltage signal to a feedback signal. A second comparator is configured to compare a periodic ramp sawtooth signal to a voltage signal on the capacitor. In an alternative method, a comparator is configured to compare the feedback signal to either the periodic ramp sawtooth reference signal or the constant DC reference signal depending on the switching operation of the switching regulator. The periodic ramp sawtooth reference signal can be either positive or negative.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: November 23, 2021
    Inventor: Hua Cao
  • Patent number: 11171280
    Abstract: A piezoelectric device includes: a first electrode provided above a substrate; a piezoelectric layer provided above the first electrode; and a second electrode provided above the piezoelectric layer. The piezoelectric layer includes a plurality of layers that includes a composite oxide of a Perovskite structure containing potassium, sodium, and niobium. The piezoelectric layer has a first region and a second region in a 3 ?m×3 ?m region of a plane perpendicular to a thickness direction of the piezoelectric layer. The first region is a region in which the ratio of an atomic concentration (atm %) of potassium with respect to the sum of the atomic concentration (atm %) of potassium and an atomic concentration (atm %) of sodium is 0.30 to 0.45, and the second region is a region in which the ratio is 0.55 to 0.75.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: November 9, 2021
    Inventors: Takayuki Yonemura, Yasuto Kakemura
  • Patent number: 11158783
    Abstract: A transformer including a piezoelectric plate and interdigital electrodes is provided. The interdigitated electrodes includes a plurality of conductive strips disposed over the piezoelectric plate. A cross-sectional Lamé mode resonance is excited in a cross sectional plane of the piezoelectric plate in response to input voltage applied through the interdigitated electrode, producing a voltage gain. A device including the aforementioned transformer is also provided.
    Type: Grant
    Filed: October 11, 2016
    Date of Patent: October 26, 2021
    Assignee: Northeastern University
    Inventors: Matteo Rinaldi, Cristian Cassella