Patents by Inventor Satoshi Kawamura

Satoshi Kawamura 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: 8350503
    Abstract: An n-phase brushless motor device is provided. The device includes a magnet for magnetic pole position detection having a number of poles twice as many as that of a rotor and fixed to a face perpendicular to a rotation axis of the rotor; n main Hall elements arranged opposite to the magnet, for detecting a magnetic pole position of the rotor; n sub Hall elements arranged in such a way as to have an offset in a direction of a periphery with respect to the main Hall elements, for detecting the magnetic pole position; and a control unit for counting “2” according to a change in an output pattern of the main Hall elements, for counting “1” when the output pattern is the same as that of the sub Hall elements at a predetermined timing, and for controlling a rotation of the rotor according to these counted values.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: January 8, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Satoshi Kawamura, Aya Nishikawa
  • Publication number: 20120318350
    Abstract: A dopant material is disclosed. The dopant material comprises a polycrystalline silicon and a dopant element in the polycrystalline silicon. A concentration of the dopant element is at least 1×1018 atoms/cm3 and no greater than 1×1020 atoms/cm3. A method for producing a dopant material is also disclosed. A fused mixture is generated by mixing and fusing a silicon material with an element that serves as the dopant source. A coagulate of the dopant material is generated by cooling and coagulating the fused mixture. A semiconductor substrate is disclosed. The semiconductor substrate comprises a semiconductor material to which the dopant material is added. A solar cell element comprising the semiconductor substrate, a first electrode, and a second electrode is disclosed. The semiconductor substrate comprises a first surface and a second surface corresponding to a rear surface of the first surface.
    Type: Application
    Filed: February 23, 2011
    Publication date: December 20, 2012
    Applicant: KYOCERA CORPORATION
    Inventors: Youhei Sakai, Satoshi Kawamura, Mayu Takimoto
  • Patent number: 8317187
    Abstract: A recording apparatus of the disclosure includes a recording unit that performs a recording process on a subject recording medium, a cassette body that accommodates the subject recording medium, a subject recording medium cassette opening that is provided in the cassette body and supplies the subject recording medium therefrom, a movable portion that switches to a closed state in which the subject recording medium cassette opening is closed or an opened state in which the subject recording medium is able to be supplied from the subject recording medium cassette opening, a lock portion that locks the movable portion in the closed state, and an insertion portion that is provided in the movable portion so that a feeding roller is able to be inserted therethrough.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: November 27, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Katsuyuki Kondo, Shintaro Komuro, Satoshi Kawamura, Shoma Kudo
  • Publication number: 20120223475
    Abstract: A recording apparatus includes a supply holding section that holds paper, which is supplied to a printing section, in an overlapping manner; a paper discharging roller that discharges the paper from the printing section; a discharge holding section that holds the paper, which are discharged from the paper discharging roller, in an overlapping manner, and is installed movably to the supply holding section, in an overlapping manner; and a moving unit that is moved to move the discharge holding section to the supply holding section so as to widen a difference of a height between the discharge holding section and the paper discharging roller according to a decrease of a holding amount of the paper in the supply holding section.
    Type: Application
    Filed: March 1, 2012
    Publication date: September 6, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Shintaro Komuro, Satoshi Kawamura, Shoma Kudo
  • Patent number: 8240449
    Abstract: A locking device of a rotary shaft includes a clutch member rotating integrally with the rotary shaft and provided so as to be displaceable in the direction of axis of the rotary shaft, a locking member provided in a fixed state to engage the clutch member to regulate the rotation of the clutch member, a biasing member biasing the clutch member toward the locking member, and a torque transmission member rotating under the rotary torque transmitted thereto from a power source, having a boss loosely inserted into a cam groove provided in an outer peripheral portion of the clutch member, and transmitting the rotary torque to the clutch member via the boss. The boss is displaced within the cam groove with switching of the rotation/stop of the torque transmission member or switching of the rotational direction thereof.
    Type: Grant
    Filed: May 8, 2009
    Date of Patent: August 14, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Yu Shinagawa, Atsuhiko Takeuchi, Satoshi Kawamura
  • Patent number: 8231288
    Abstract: A rotary shaft locking device includes a locking unit having a transmission gear receiving rotary torque from a power source, transmitting rotary torque to a rotary shaft as the transmission gear receives rotary torque from the power source, and locking the rotary shaft as transmission of rotary torque from the power source is cut off, and a first planetary gear and a second planetary gear provided to be meshed with a sun gear and to planetarily move around the sun gear, and displaced between a meshed position and an unmeshed position so as to be meshed with and separated from the transmission gear. The locking unit locks the rotary shaft for a power cutoff time which occurs when the rotation direction of the sun gear is switched and for which the transmission gear is not meshed with both the first planetary gear and the second planetary gear.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: July 31, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Satoshi Kawamura, Yu Shinagawa, Atsuhiko Takeuchi
  • Patent number: 8223295
    Abstract: A liquid-crystal display that can inhibit the coloring of an image when a liquid-crystal panel is viewed from an oblique direction is provided. An optical filter is disposed at the forward end of a liquid-crystal panel and has different transmittances between a light component that travels in an oblique direction and a light component that travels in a direction normal to the multilayer, where both of the light components have a predetermined wavelength range. In the case where a wide-color-gamut light source, such as LEDs, is used as a light sources of a backlight unit, when the liquid-crystal panel is viewed from an oblique direction, the entire image area tends to be reddish, and the color temperature tends to decrease. In this case, the optical filter is configured such that the intensity of a visible red light component is selectively reduced such that the intensity of a visible blue light component is increased, thereby inhibiting the reddening of an image area when viewed from an oblique direction.
    Type: Grant
    Filed: May 23, 2006
    Date of Patent: July 17, 2012
    Assignee: Sony Corporation
    Inventors: Satoshi Sato, Satoshi Kawamura, Masaharu Senoue, Norimasa Furukawa, Kenichi Sasaki
  • Publication number: 20120086164
    Abstract: A recording apparatus of the disclosure includes a recording unit that performs a recording process on a subject recording medium, a cassette body that accommodates the subject recording medium, a subject recording medium cassette opening that is provided in the cassette body and supplies the subject recording medium therefrom, a movable portion that switches to a closed state in which the subject recording medium cassette opening is closed or an opened state in which the subject recording medium is able to be supplied from the subject recording medium cassette opening, a lock portion that locks the movable portion in the closed state, and an insertion portion that is provided in the movable portion so that a feeding roller is able to be inserted therethrough.
    Type: Application
    Filed: October 6, 2011
    Publication date: April 12, 2012
    Applicant: Seiko Epson Corporation
    Inventors: Katsuyuki KONDO, Shintaro KOMURO, Satoshi KAWAMURA, Shoma KUDO
  • Patent number: 8150601
    Abstract: An EGR valve control system includes a motor 5 exercising the opening and closing control of an EGR valve; a sensor 6 detecting the actual opening position of the EGR valve; and a motor control apparatus (control arithmetic section 1) computing a drive duty of the motor 5 based on a target opening position of the EGR valve and the actual opening position thereof detected by the sensor 6; and the control apparatus is arranged such that the control arithmetic section 1, when a target opening position of the EGR valve is set, computes an integral term based on the deviation between the target opening position and the actual opening position of the EGR valve, a proportional term and a differential term based on the change of the actual opening position of the EGR valve, and a feedforward term based on the change of the target opening position, respectively, and the control arithmetic section further exercises the opening and closing control of the EGR valve by computing the drive duty of the motor 5 by performing
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: April 3, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Satoshi Kawamura, Kazuaki Shinya
  • Publication number: 20110316459
    Abstract: When an output pattern (LLL or HHH) due to a signal with a prescribed logic level corresponding to a ground short or instantaneous interruption of an output signal line of Hall ICs 17 is supplied via the output signal lines, and if output patterns based on detection signals supplied before and after the output pattern are found to be different by comparing them, a decision is made that there is a possibility that a shift of a rotor 11 from a target position and counterrotation of the rotor 11 involved with it can occur.
    Type: Application
    Filed: May 8, 2009
    Publication date: December 29, 2011
    Applicant: Mitsubishi Electric Corporation
    Inventors: Satoshi Kawamura, Shigenaga Yamasaki
  • Patent number: 8061498
    Abstract: A wet clutch friction plate is provided in which a plurality of oil channels (22) are formed in a friction material (21) bonded to one side face or opposite side faces of a core plate (20), the plurality of oil channels (22) providing communication between inner and outer peripheral edges of the friction material (21), and a plurality of oil channels (22) having a discharge angle (?) that discharge oil from an inner peripheral side to an outer peripheral side of the friction plate (15) when the friction plate (15) rotates and a plurality of oil channels (22) having an inflow angle (?) that draw oil in from the outer peripheral side to the inner peripheral side of the friction plate (15) are mixed at substantially equal intervals. In this way, the frictional properties can be stabilized when connection of the clutch is in transition, and the phenomenon of drag due to oil viscosity resistance can be suppressed when the clutch is in an off state.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: November 22, 2011
    Assignee: Kabushiki Kaisha F.C.C.
    Inventors: Akira Tsuboi, Satoshi Kawamura, Mitsuo Miyatsu, Fumiyoshi Iida
  • Publication number: 20110273127
    Abstract: In opening/closing control for the valve mechanism to which the return torque is applied in an opening direction or a closing direction of the valve, provided are a position control system for outputting a q-axis current command based on a position deviation between a target position command directed to the brushless DC motor and the coarse present position of the motor obtained by using the position detection sensor of a pulse output type, and a current control system in which a virtual current feedback is built for outputting a phase voltage command without a current sensor based on the q-axis current command and the coarse present position of the motor obtained by using the position detection sensor of the pulse output type.
    Type: Application
    Filed: January 12, 2010
    Publication date: November 10, 2011
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Naoki Imamura, Masahiro Iezawa, Satoshi Kawamura, Yoshitaka Onishi
  • Patent number: 8040085
    Abstract: A brushless motor apparatus includes a fixedly arranged stator 14, a rotor 12 rotated in a manner sequentially excited by a plurality of excitation patterns, a magnetic-pole-position detecting magnet 16 fixed to the rotor and having twice the number of poles of the rotor, and a position detecting element 18 arranged opposite to the magnetic-pole-position detecting magnet and detecting the position of magnetic poles of the rotor, and further includes a motor drive circuit serving as a control such that when the stator is excited with a different excitation pattern between regular excitation patterns on normal operation at the time of phase matching carried out upon actuation of a power source, the rotation angle of the rotor is one-half the rotation angle corresponding to the regular excitation pattern.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: October 18, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Satoshi Kawamura, Masayuki Yokoyama, Kazuaki Shinya
  • Publication number: 20110062358
    Abstract: A valve control apparatus sets a certain soft landing start target position to a drive control unit for carrying out driving of a DC motor 2 as a target open position in response to a fully close command, and sets the target open position which the valve control apparatus acquires by gradually decreasing the soft landing start target position to the above-mentioned drive control unit at a time when the difference between an actual open position and the soft landing start target position becomes equal to a first threshold.
    Type: Application
    Filed: May 12, 2009
    Publication date: March 17, 2011
    Inventors: Satoshi Kawamura, Shigenaga Yamasaki, Satsuo Miyoshi
  • Publication number: 20100319664
    Abstract: An EGR valve control system includes a motor 5 exercising the opening and closing control of an EGR valve; a sensor 6 detecting the actual opening position of the EGR valve; and a motor control apparatus (control arithmetic section 1) computing a drive duty of the motor 5 based on a target opening position of the EGR valve and the actual opening position thereof detected by the sensor 6; and the control apparatus is arranged such that the control arithmetic section 1, when a target opening position of the EGR valve is set, computes an integral term based on the deviation between the target opening position and the actual opening position of the EGR valve, a proportional term and a differential term based on the change of the actual opening position of the EGR valve, and a feedforward term based on the change of the target opening position, respectively, and the control arithmetic section further exercises the opening and closing control of the EGR valve by computing the drive duty of the motor 5 by performing
    Type: Application
    Filed: October 25, 2007
    Publication date: December 23, 2010
    Inventors: Satoshi Kawamura, Kazuaki Shinya
  • Publication number: 20100283416
    Abstract: A brushless motor device switches between a 120-degree energization method and a 180-degree energization method of advancing an electrical angle by 30 degrees to drive a brushless motor 1 according to the result of a comparison between the rotational speed of the brushless motor 1 and a predetermined threshold.
    Type: Application
    Filed: February 27, 2009
    Publication date: November 11, 2010
    Inventors: Yoshitaka Onishi, Satoshi Kawamura, Tomohiro Ueno
  • Publication number: 20100250184
    Abstract: An arithmetic processing means detects a change in a rotation angle of one or more rotations from the direction of a change in the sign of one of sensor output signals and the sign of the other sensor output signal, and generates multiple rotation angle information from information about the detected change in the rotation angle of one or more rotations and rotation angle information about one rotation calculated from the sensor output signals.
    Type: Application
    Filed: March 6, 2009
    Publication date: September 30, 2010
    Inventors: Satoshi Kawamura, Masahiro Iezawa, Masaya Inoue, Yoshitaka Onishi, Fumitaka Takenaga, Sotsuo Miyoshi, Takeshi Mori
  • Publication number: 20100225259
    Abstract: A brushless motor apparatus includes a fixedly arranged stator 14, a rotor 12 rotated in a manner sequentially excited by a plurality of excitation patterns, a magnetic-pole-position detecting magnet 16 fixed to the rotor and having twice the number of poles of the rotor, and a position detecting element 18 arranged opposite to the magnetic-pole-position detecting magnet and detecting the position of magnetic poles of the rotor, and further includes a motor drive circuit serving as a control such that when the stator is excited with a different excitation pattern between regular excitation patterns on normal operation at the time of phase matching carried out upon actuation of a power source, the rotation angle of the rotor is one-half the rotation angle corresponding to the regular excitation pattern.
    Type: Application
    Filed: April 27, 2007
    Publication date: September 9, 2010
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Satoshi Kawamura, Masayuki Yokoyama, Kazuaki Shinya
  • Publication number: 20090302793
    Abstract: An n-phase brushless motor device includes: a magnet 16 for magnetic pole position detection having a number of poles twice as many as that of a rotor and fixed to a face perpendicular to a rotation axis of the rotor; n main Hall elements 18a arranged opposite to the magnet, for detecting a magnetic pole position of the rotor; n sub Hall elements 18b arranged in such a way as to have an offset in a direction of a periphery with respect to the main Hall elements, for detecting the magnetic pole position; and a control unit for counting “2” according to a change in an output pattern of the main Hall elements, for counting “1” when the output pattern is the same as that of the sub Hall elements at a predetermined timing, and for controlling a rotation of the rotor according to these counted values.
    Type: Application
    Filed: November 8, 2007
    Publication date: December 10, 2009
    Inventors: Satoshi Kawamura, Aya Nishikawa
  • Publication number: 20090277744
    Abstract: A locking device of a rotary shaft includes a clutch member rotating integrally with the rotary shaft and provided so as to be displaceable in the direction of axis of the rotary shaft, a locking member provided in a fixed state to engage the clutch member to regulate the rotation of the clutch member, a biasing member biasing the clutch member toward the locking member, and a torque transmission member rotating under the rotary torque transmitted thereto from a power source, having a boss loosely inserted into a cam groove provided in an outer peripheral portion of the clutch member, and transmitting the rotary torque to the clutch member via the boss. The boss is displaced within the cam groove with switching of the rotation/stop of the torque transmission member or switching of the rotational direction thereof.
    Type: Application
    Filed: May 8, 2009
    Publication date: November 12, 2009
    Applicant: Seiko Epson Corporation
    Inventors: Yu SHINAGAWA, Atsuhiko TAKEUCHI, Satoshi KAWAMURA