Patents by Inventor Masahiro Kanamaru

Masahiro Kanamaru 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: 20190265070
    Abstract: To provide a rotational position detecting device in which a rotational position detection error caused by variation in distance between a sensor magnet and a magnetic sensor is reduced, the rotational position detecting device includes a sensor magnet (30) configured to generate a magnetic flux; a holder (34), which is configured to hold the sensor magnet, and has a pressure-contact portion (340) to be fixed to a shaft (40) of a motor (1); and a magnetic sensor (32) configured to detect the magnetic flux generated by the sensor magnet, the magnetic sensor being directly or indirectly fixed to the motor, and being arranged away from the sensor magnet in an axial direction of the shaft, the shaft having an abutment portion (403, 405, 5) configured to receive a distal end portion (341) of the pressure-contact portion.
    Type: Application
    Filed: November 16, 2016
    Publication date: August 29, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shusuke HORI, Yosuke YUI, Yu KAWANO, Masahiro KANAMARU
  • Patent number: 9728215
    Abstract: A magnetic disk apparatus of one of the embodiments stores read position dependency information on read signal quality of a data region at a first track and measures the read signal quality at a predetermined radial position in a second data region of a second track different from the first track. A positioning error of the second data region is determined based on the read position dependency information and the read signal quality at the predetermined radial position. Data is recorded in a recording target data region in a shingled recording so as to prevent data written in the second data region from being overwritten by data in a recording target data region adjacent to the second data region by using the determined positioning error.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: August 8, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masahiro Kanamaru, Kazuto Kashiwagi, Takeyori Hara
  • Publication number: 20160217815
    Abstract: A magnetic disk apparatus of one of the embodiments stores read position dependency information on read signal quality of a data region at a first track and measures the read signal quality at a predetermined radial position in a second data region of a second track different from the first track. A positioning error of the second data region is determined based on the read position dependency information and the read signal quality at the predetermined radial position. Data is recorded in a recording target data region in a shingled recording so as to prevent data written in the second data region from being overwritten by data in a recording target data region adjacent to the second data region by using the determined positioning error.
    Type: Application
    Filed: April 1, 2016
    Publication date: July 28, 2016
    Inventors: Masahiro Kanamaru, Kazuto Kashiwagi, Takeyori Hara
  • Patent number: 9226417
    Abstract: A lock mechanism includes: a lock arm provided in a cantilever manner on an inner wall of a part compartment of a box body of an electric connection box; and a lock projection provided to the lock arm on its surface facing a part housed in the part compartment. The lock arm can be divided in a longitudinal direction into: a base end region fixed to the inner wall; upper end region located in the free end which interferes with the part and receives a pressing force for unlocking operation; and a middle region located within a predetermined distance range between the base and upper end region. The flexural rigidity of the base and upper end region is set larger than that of the middle region by providing ribs on the base and upper end region and providing no ribs on the middle region.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: December 29, 2015
    Assignee: Yazaki Corporation
    Inventors: Makoto Nakayama, Masahiro Kanamaru
  • Publication number: 20150294690
    Abstract: A magnetic disk apparatus of one of the embodiments stores read position dependency information on read signal quality of a data region at a first track and measures the read signal quality at a predetermined radial position in a second data region of a second track different from the first track. A positioning error of the second data region is determined based on the read position dependency information and the read signal quality at the predetermined radial position. Data is recorded in a recording target data region in a singled recording so as to prevent data written in the second data region from being overwritten by data in a recording target data region adjacent to the second data region by using the determined positioning error.
    Type: Application
    Filed: September 4, 2014
    Publication date: October 15, 2015
    Inventors: Masahiro Kanamaru, Kazuto Kashiwagi, Takeyori Hara
  • Patent number: 9105277
    Abstract: According to one embodiment, an equalizer is configured to obtain a noise included in a first correction signal by using a noise component of a first track and a noise interference component from a second track. The equalizer is configured to correct the first correction signal by using the obtained noise. The equalizer is configured to equalize the corrected first correction signal. The noise component of the first track is calculated based on a noise component of the first track at a first timing and a noise component of the first track at a second timing earlier than the first timing. The noise interference component from the second track is calculated based on a noise interference component from the second track at the first timing and a noise interference component from the second track at the second timing. The decoder is configured to decode the equalized first correction signal.
    Type: Grant
    Filed: September 9, 2014
    Date of Patent: August 11, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kohsuke Harada, Akihiro Yamazaki, Nobuhiro Maeto, Kazuto Kashiwagi, Naoki Tagami, Masahiro Kanamaru, Tomokazu Okubo
  • Patent number: 9064522
    Abstract: A stamper of an embodiment includes: a base portion having a main surface; and a plurality of guides arranged on the main surface in mutually different first and second directions and serving as references of arrangement of a plurality of self-assembled dots. A distance between the guides in a third direction is within a range of an integer m1 ±0.05 times of a pitch of the plural self-assembled dots. The third direction corresponds to a third vector obtained by combining a first vector corresponding to the arrangement of the guides in the first direction and a second vector corresponding to the arrangement of the guides in the second direction. A distance between the plural guides in the first direction falls out of a range of an integer m2 ±0.15 times of the pitch of the plural self-assembled dots.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: June 23, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masahiro Kanamaru, Yoshiyuki Kamata, Ryosuke Yamamoto, Takeshi Okino, Akira Kikitsu, Katsuya Sugawara, Yasuaki Ootera, Tomoyuki Maeda
  • Patent number: 8989525
    Abstract: According to an embodiment, a light deflecting element includes a dielectric body, a first electrode, and a second electrode. The second electrode is configured to sandwich the dielectric body with the first electrode so as to apply a voltage to the dielectric body. The second electrode includes orthogonal portions that are substantially orthogonal to an incident direction of a light beam passing through the dielectric body, parallel portions that are substantially parallel to the incident direction of the light beam. The orthogonal portions and the parallel portions are formed in an alternate manner on the light beam incident side of the dielectric body. The second electrode includes a linear sloping portion that slopes in a direction toward intersection with the incident direction of the light beam. The orthogonal portions, the parallel portions, and the linear sloping portion are formed integrally.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: March 24, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuuzo Kamiguchi, Katsuya Sugawara, Masahiro Kanamaru, Keiichiro Yusu, Masatoshi Sakurai
  • Publication number: 20140374380
    Abstract: A stamper of an embodiment includes: a base portion having a main surface; and a plurality of guides arranged on the main surface in mutually different first and second directions and serving as references of arrangement of a plurality of self-assembled dots. A distance between the guides in a third direction is within a range of an integer m1±0.05 times of a pitch of the plural self-assembled dots. The third direction corresponds to a third vector obtained by combining a first vector corresponding to the arrangement of the guides in the first direction and a second vector corresponding to the arrangement of the guides in the second direction. A distance between the plural guides in the first direction falls out of a range of an integer m2±0.15 times of the pitch of the plural self-assembled dots.
    Type: Application
    Filed: January 29, 2014
    Publication date: December 25, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masahiro KANAMARU, Yoshiyuki KAMATA, Ryosuke YAMAMOTO, Takeshi OKINO, Akira KIKITSU, Katsuya SUGAWARA, Yasuaki OOTERA, Tomoyuki MAEDA
  • Patent number: 8896959
    Abstract: According to one embodiment, a magnetic disk apparatus includes a magnetic disk having a plurality of tracks, each of the plurality of tracks having a plurality of servo areas and a plurality of data areas, the plurality of servo areas and the plurality of data areas being alternately arranged respectively, a magnetic head, and a processor. When a plurality of positioning errors related to one servo area are present in the first track, the processor updates the positioning error of the one servo area with a positioning error closest to a second track that is next to the first track. The processor writes data in the second track by a shingled write recording system by using the updated positioning error.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: November 25, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuto Kashiwagi, Takeyori Hara, Takayuki Kawabe, Masahiro Kanamaru, Takuji Matsuzawa
  • Patent number: 8820573
    Abstract: As monitor 1 held by casing 3 is upwardly pushed, clamp 2 is rectilinearly moved toward push latch 4 in cooperation with rotation of the monitor 1, the monitor 1 is rotatable by claw section 2a disengaged from locking hole 1b, and a striker holding section 4a engages with striker 2b to be forced into the main body of the latch 4 to be in engagement locked position. As the opened monitor 1 is upwardly pushed, the clamp 2 is rectilinearly moved toward the latch 4 in cooperation with the rotation of the monitor 1, the holding section 4a placed in the locked position with the striker 2b is forced into the main body of the latch 4 to be in engagement-lock releasing position, and the released section 2a is urged and moved by spring 5 to lock the hole 1b to hold the monitor 1 in closed position.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: September 2, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuhiro Tsuzuki, Masahiro Kanamaru, Jiro Yoshizawa
  • Publication number: 20140106065
    Abstract: A method for manufacturing a patterned medium of an embodiment includes forming a perpendicular magnetic recording layer on a substrate, forming a mask on the perpendicular magnetic recording layer, milling the perpendicular magnetic recording layer, and depositing a protective layer on the perpendicular magnetic recording layer. The perpendicular magnetic recording layer includes a first element selected from Fe and Co and a second element selected from Pt and Pd, and has a hard magnetic alloy material having an L10 or L11 structure. A temperature of the substrate during the milling is higher than or equal to 250° C. and lower than or equal to 500° C.
    Type: Application
    Filed: June 28, 2013
    Publication date: April 17, 2014
    Inventors: Tomoyuki MAEDA, Hiroyuki HIEDA, Masahiro KANAMARU, Katsuya SUGAWARA
  • Publication number: 20130258452
    Abstract: According to an embodiment, a light deflecting element includes a dielectric body, a first electrode, a second electrode, and a third electrode. Each of the second electrode and third electrode is configured to sandwich the dielectric body with the first electrode. The second electrode includes an electrode having a side that lies substantially orthogonal to an incident direction of a light beam, a side that is substantially parallel to the incident direction, and a side that intersects with the incident direction. The third electrode includes an electrode having a side that is aligned with the second electrode, a side that is substantially parallel to an incident direction of the light beam, and a side that intersects with the light beam, and that slopes in an opposite to that of the side of the second electrode that intersects with the light beam.
    Type: Application
    Filed: December 28, 2012
    Publication date: October 3, 2013
    Inventors: Yuuzo KAMIGUCHI, Masahiro Kanamaru, Katsuya Sugawara, Keiichiro Yusu, Masatoshi Sakurai
  • Publication number: 20130259417
    Abstract: According to an embodiment, a light deflecting element includes a dielectric body, a first electrode, and a second electrode. The second electrode is configured to sandwich the dielectric body with the first electrode so as to apply a voltage to the dielectric body. The second electrode includes orthogonal portions that are substantially orthogonal to an incident direction of a light beam passing through the dielectric body, parallel portions that are substantially parallel to the incident direction of the light beam. The orthogonal portions and the parallel portions are formed in an alternate manner on the light beam incident side of the dielectric body. The second electrode includes a linear sloping portion that slopes in a direction toward intersection with the incident direction of the light beam. The orthogonal portions, the parallel portions, and the linear sloping portion are formed integrally.
    Type: Application
    Filed: December 26, 2012
    Publication date: October 3, 2013
    Inventors: Yuuzo Kamiguchi, Katsuya Sugawara, Masahiro Kanamaru, Keiichiro Yusu, Masatoshi Sakurai
  • Publication number: 20130077459
    Abstract: In a recording and reproducing apparatus, an optical disc is rotated in a rotating direction and an optical system focuses a laser beam on the optical disc to form a beam spot on the optical disc. The optical system is provided with a scanner which deflects the laser beam along a radial direction of the optical disc in such a manner that the beam spot follows a first scan trajectory along a first direction crossing the rotating direction and a second scan trajectory along a second direction different from the first direction. A first data track with a sequence of recording pits along the first scan trajectory is formed and arranged on the optical disc.
    Type: Application
    Filed: June 29, 2012
    Publication date: March 28, 2013
    Inventors: Yuuzo KAMIGUCHI, Masahiro KANAMARU, Katsuya SUGAWARA, Keiichiro YUSU, Masatoshi SAKURAI, Kazuki MATSUMOTO, Takehiro HIRAMATSU
  • Publication number: 20120251927
    Abstract: A hologram-recording medium containing: a recording layer containing a polymerizable monomer containing a structural framework represented by the following general formula (1). In general formula (1), X and Y are not the same, and X and Y are selected from hydrogen, iodine, bromine, and chlorine atoms and from methyl, ethyl, isopropyl, tert-butyl, phenyl, naphthyl, hydroxyl, methoxy, ethoxy, isopropoxy, tert-butoxy, phenoxy, naphthoxy, acetyl, carboxyl, acetoxy, thiophenyl, thionaphthyl, thiomethyl, thioethyl, thioisopropyl, thio-tert-butyl, and thiol groups; and W is selected from the group consisting of benzylvinyl, styryl, acryloyl, and methacryloyl groups.
    Type: Application
    Filed: June 15, 2012
    Publication date: October 4, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Norikatsu Sasao, Kazuki Matsumoto, Rumiko Hayase, Yoshiaki Kawamonzen, Masahiro Kanamaru, Masaya Terai
  • Publication number: 20120228445
    Abstract: In a mounting structure for mounting an external wall 21 of a chassis 20 made of metal on an internal wall 11 of a panel 10 made of resin, abutting portions 13 to 16 are arranged in positions separate from corners 12 of the internal wall 11 of the panel 10 to provide partial contact between the chassis and the panel.
    Type: Application
    Filed: March 25, 2010
    Publication date: September 13, 2012
    Inventors: Hideyuki Hirota, Jiro Yoshizawa, Masahiro Kanamaru
  • Publication number: 20120047848
    Abstract: As monitor 1 held by casing 3 is upwardly pushed, clamp 2 is rectilinearly moved toward push latch 4 in cooperation with rotation of the monitor 1, the monitor 1 is rotatable by claw section 2a disengaged from locking hole 1b, and a striker holding section 4a engages with striker 2b to be forced into the main body of the latch 4 to be in engagement locked position. As the opened monitor 1 is upwardly pushed, the clamp 2 is rectilinearly moved toward the latch 4 in cooperation with the rotation of the monitor 1, the holding section 4a placed in the locked position with the striker 2b is forced into the main body of the latch 4 to be in engagement-lock releasing position, and the released section 2a is urged and moved by spring 5 to lock the hole 1b to hold the monitor 1 in closed position.
    Type: Application
    Filed: August 24, 2009
    Publication date: March 1, 2012
    Inventors: Kazuhiro Tsuzuki, Masahiro Kanamaru, Jiro Yoshizawa
  • Publication number: 20120050626
    Abstract: A monitor 1 is housed inside a casing 2 attached to a vehicle ceiling 10, and a monitor locking hook 6 locks a locking hole 1c. As a lock release button 7 is pushed to release the lock, a spring 3 located on one end side of a rotation shaft 1a rotates the monitor 1 to open the monitor 1. At that time, a gear 4 located on the other end side of the rotation shaft 1a meshes with a gear dumper 5 of the casing 2 to control the rotational speed of the monitor 1. As the stopper 9 of the monitor 1 abuts against the stopper receiver 8, the rotation thereof is stopped and the posture of the monitor 1 is held by the tension of the spring 3.
    Type: Application
    Filed: August 7, 2009
    Publication date: March 1, 2012
    Inventors: Kazuhiro Tsuzuki, Masahiro Kanamaru, Jiro Yoshizawa
  • Publication number: 20110228663
    Abstract: A holographic recording method includes the following steps: irradiating an optical recording medium with a coherent reference beam and a coherent information beam to produce a hologram in the optical recording medium while irradiating the optical recording medium with an incoherent pretreatment beam to consume a polymerization inhibitor; irradiating the hologram with the reference beam to extract a reproduction beam while stopping irradiating the optical recording medium with the reference beam; sensing the signal beam with an image pick-up unit to detect an intensity of the signal beam; and calculating a bit error rate with a control unit to irradiate the hologram with the information beam if the bit error rate is larger than a prescribed value, or to stop irradiating the optical recording medium with the reference beam, the information beam and the pretreatment beam if the bit error rate is smaller than the prescribed value.
    Type: Application
    Filed: September 13, 2010
    Publication date: September 22, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masaya Terai, Kazuki Matsumoto, Rumiko Hayase, Yoshiaki Kawamonzen, Norikatsu Sasao, Masahiro Kanamaru