Patents by Inventor Tadashi Yamashita

Tadashi Yamashita 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: 20200256995
    Abstract: A laser radar device includes: a light source; a projection light scanner that scans one part of light split off from emission light of the light source, and that generates transmission light for radiating onto a target object; an image forming section that forms plural respective reception lights of the transmission light reflected by respective locations of the target object into an image on a single flat plane as plural image-formation points; an optical receiver that is disposed at the plural image-formation points, and that includes plural unit optical reception sections for mixing each of the plural reception lights together with a reference light and performing optical heterodyne detection; and a reference light scanner that scans or distributes another light split off from the emission light from the light source, and that generates the reference light for radiating onto each of plural of the unit optical reception sections.
    Type: Application
    Filed: November 18, 2015
    Publication date: August 13, 2020
    Inventors: Daisuke INOUE, Tadashi ICHIKAWA, Tatsuya YAMASHITA, Akari NAKAO, Kazuo HASEGAWA
  • Patent number: 10739457
    Abstract: A laser radar device includes: a light source; a projection light scanner that scans one part of light split off from emission light of the light source, and that generates transmission light for radiating onto a target object; an image forming section that forms plural respective reception lights of the transmission light reflected by respective locations of the target object into an image on a single flat plane as plural image-formation points; an optical receiver that is disposed at the plural image-formation points, and that includes plural unit optical reception sections for mixing each of the plural reception lights together with a reference light and performing optical heterodyne detection; and a reference light scanner that scans or distributes another light split off from the emission light from the light source, and that generates the reference light for radiating onto each of plural of the unit optical reception sections.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: August 11, 2020
    Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Daisuke Inoue, Tadashi Ichikawa, Tatsuya Yamashita, Akari Nakao, Kazuo Hasegawa
  • Publication number: 20200161467
    Abstract: A semiconductor device includes an inversion type semiconductor element, which has: a substrate; a drift layer; a saturation current suppression layer; a current dispersion layer; a base region; a source region; a connection layer; a plurality of trench gate structures; an interlayer insulation film; a source electrode; and a drain electrode. A channel region is provided in a portion of the base region in contact with each trench gate structure by applying a gate voltage to the gate electrode and applying a normal operation voltage as a drain voltage to the drain electrode; and a current flows between the source electrode and the drain electrode through the source region and the JFET portion.
    Type: Application
    Filed: December 30, 2019
    Publication date: May 21, 2020
    Inventors: Yuichi TAKEUCHI, Shuhei MITANI, Yasuhiro EBIHARA, Yusuke YAMASHITA, Tadashi MISUMI
  • Patent number: 10578200
    Abstract: A gear pair includes a first gear and a second gear that are engaged and paired with each other, wherein the arithmetic average roughness Ra of the tooth surface of the first gear is less than 0.10, and the arithmetic average roughness Ra of the tooth surface of the second gear is equal to or greater than 0.15. An improvement of the transmission efficiency is achieved due to the improved composite roughness of the gear pair. Accordingly, both of the improvement of the transmission efficiency of the gears and an improvement of the pitting fatigue life are achieved at low cost.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: March 3, 2020
    Assignees: NISSAN MOTOR CO., LTD., AICHI MACHINE INDUSTRY CO., LTD.
    Inventors: Takemichi Yamashita, Yutaka Mabuchi, Takeshi Kariya, Takao Mori, Tadashi Goto, Hiroyasu Nagami
  • Patent number: 10520233
    Abstract: An air-conditioning apparatus is capable of efficiently performing defrosting operation without suspending a heating operation of an indoor unit. The air-conditioning apparatus includes a main circuit sequentially connecting, via a pipe, a compressor, indoor heat exchangers, first flow control devices, and a plurality of parallel heat exchangers connected in parallel to each other to allow refrigerant to circulate, first defrost pipes branching a part of the refrigerant discharged from the compressor and causing the part of the refrigerant to flow into one of the plurality of parallel heat exchangers to be defrosted, an interface heat exchanger located between the plurality of parallel heat exchangers, a first bypass pipe branching a part of the refrigerant discharged from the compressor and causing the part of the refrigerant to flow into the interface heat exchanger, and a second bypass pipe causing the part of the refrigerant flowing out of the interface heat exchanger to flow into the main circuit.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: December 31, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuya Watanabe, Shinichi Wakamoto, Naofumi Takenaka, Naomichi Tamura, Tadashi Ariyama, Koji Yamashita, Takeshi Hatomura
  • Patent number: 10508826
    Abstract: An air-conditioning apparatus includes a selection unit and a determination unit, the selection unit selecting a reverse-defrosting operation mode or a heating-defrosting simultaneous operation mode, the reverse-defrosting operation mode being a mode in which all of parallel heat exchangers are defrosted by stopping a heating operation, the heating-defrosting simultaneous operation mode being a mode in which each parallel heat exchanger is sequentially defrosted while continuing a heating operation, the determination unit determining whether or not a defrosting operation is to be started, in which the determination unit is configured to start the defrosting operation in a state where the amount of frost deposited on the parallel heat exchangers is smaller in a case where the heating-defrosting simultaneous operation mode is selected than in a case where the reverse-defrosting operation is selected.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: December 17, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naofumi Takenaka, Shinichi Wakamoto, Kazuya Watanabe, Naomichi Tamura, Tadashi Ariyama, Koji Yamashita, Takeshi Hatomura
  • Patent number: 10429508
    Abstract: A distance measuring device includes a first measurer, a second distance measurer, and circuitry. The first distance measurer measures a distance to a target object; and outputs first distance information indicating a measured distance when the distance measurement is performed under a condition that satisfies a distance measurement condition, but outputs the first distance information indicating a predetermined value when the distance measurement is performed under a condition that does not satisfy the distance measurement condition. The second distance measurer measures a distance to the target object and outputs second distance information indicating the measured distance. When the first distance information indicates the predetermined value and the second distance information satisfies a predetermined condition, the circuitry makes alteration such that the distance measurement condition is relaxed.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: October 1, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tetsuo Yamashita, Satoshi Sawaguchi, Fumiko Sakoh, Soichiro Yokota, Kiichiroh Saitoh, Tadashi Nakamura
  • Patent number: 9821782
    Abstract: A motor pump includes a base body, a pump, and a motor. The motor includes a tubular yoke having a bottom and an opening on a base body side, a bearing, a rotation shaft, a rotor, a commutator, a brush and a brush shaft. The bearing is fitted to an inside of a bearing hole of the base body. The brush holder is fitted to an inside of the yoke and engages with an outer peripheral surface of the bearing. The brush holder and the bearing are disposed so as to be spaced from the base body in an axial direction of the rotation shaft. The motor-side seal member is provided between the yoke and the base body. The base body constitutes a stopper that prevents the brush holder from being extracted from the yoke.
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: November 21, 2017
    Assignee: NISSIN KOGYO CO., LTD.
    Inventors: Takuro Kodama, Tadashi Yamashita, Tomohide Tanaka
  • Patent number: 8683656
    Abstract: A work machine handle device includes a handle foldable relative to a frame. The frame has a handle support part about which the handle turns. The handle intersects the handle support part. Left and right attachment parts, which are portions where the handle intersects the handle support part, are supported by a handle turning mechanism with suitable pressure.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: April 1, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Hiroshi Mizuguchi, Tadashi Yamashita, Taiyo Onodera
  • Publication number: 20130017103
    Abstract: A motor pump includes a base body, a pump, and a motor. The motor includes a tubular yoke having a bottom and an opening on a base body side, a bearing, a rotation shaft, a rotor, a commutator, a brush and a brush shaft. The bearing is fitted to an inside of a bearing hole of the base body, The brush holder is fitted to an inside of the yoke and engages with an outer peripheral surface of the bearing. The brush holder and the bearing are disposed so as to be spaced from the base body in an axial direction of the rotation shaft. The motor-side seal member is provided between the yoke and the base body. The base body constitutes a stopper that prevents the brush holder from being extracted from the yoke.
    Type: Application
    Filed: July 10, 2012
    Publication date: January 17, 2013
    Applicant: NISSIN KOGYO CO., LTD.
    Inventors: Takuro KODAMA, Tadashi YAMASHITA, Tomohide TANAKA
  • Publication number: 20110308040
    Abstract: A work machine handle device includes a handle foldable relative to a frame. The frame has a handle support part about which the handle turns. The handle intersects the handle support part. Left and right attachment parts, which are portions where the handle intersects the handle support part, are supported by a handle turning mechanism with suitable pressure.
    Type: Application
    Filed: June 22, 2011
    Publication date: December 22, 2011
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Hiroshi Mizuguchi, Tadashi Yamashita, Taiyo Onodera
  • Patent number: 6539800
    Abstract: A wheel speed sensor-mounting structure has a wheel speed sensor mounted on an attachment member fixed to a non-rotatable vehicular portion, such as a torque plate and a dust cover, by way of a fastener accessible from the outside of the drum brake.
    Type: Grant
    Filed: March 22, 2001
    Date of Patent: April 1, 2003
    Assignee: Nisshinbo Industries, Inc.
    Inventor: Tadashi Yamashita
  • Publication number: 20020007675
    Abstract: A wheel speed sensor-mounting structure has a wheel speed sensor mounted on an attachment member fixed to a non-rotatable vehicular portion, such as a torque plate and a dust cover, by way of a fastener accessible from the outside of the drum brake.
    Type: Application
    Filed: March 22, 2001
    Publication date: January 24, 2002
    Inventor: Tadashi Yamashita
  • Patent number: 6155728
    Abstract: A type printer in which deterioration of a platen is prevented by distributing positions of impacts on the platen by a printing head over the whole region of peripheral surface of a cylindrical platen. The drive shafts of a paper feed roller, platen, and tractor are operatively connected to each other by a gear train, and driven by a motor. The gear ratio of gears in the gear train is selected so that the peripheral velocities of the paper feed roller, platen, and tractor agree with each other. The platen rotates in synchronism with the feed velocity of paper fed by the paper feed roller and the tractor, by which the positions of impacts, which are effected by the printing head, are distributed over the whole region on the peripheral surface of the platen.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: December 5, 2000
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Tsuyoshi Sakaino, Tadashi Yamashita
  • Patent number: 6126347
    Abstract: First and second sheet guides (21, 31) are arranged individually in front and at the back of a print head (6) in a sheet feeding direction. Each of these sheet guides (21, 31) has an arcuate end edge opposite to the print head (6), the width-direction central portion of the end edge being located at the longest distance from the print head so that the space between the end edge and the print head gradually increases with lateral distance from the width-direction central portion of the end edge. In consequence, the leading end portion of a sheet that is printed by means of the print head (6), especially its opposite ends, can be prevented from abutting against the sheet guides (21, 31) and causing jamming due to deformation of the sheet or the like as the leading end portion of the sheet passes through a gap between a conveyor plate (9) and the sheet guides (21, 31).
    Type: Grant
    Filed: January 26, 1999
    Date of Patent: October 3, 2000
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Tsuyoshi Sakaino, Tadashi Yamashita
  • Patent number: 5894717
    Abstract: A mulching mower is provided which is capable of cutting grasses finely without leaving uncut grasses and which is capable of discharging the cut grass clippings onto the cut grass path so as to be evenly dispersed. A pair of cutter blades are arranged to the right and to the left of the mulching mower in a cutter housing which opens downwardly. A guitar-shaped or figure 8 shaped enclosure wall hangs down from an under surface of an upper wall of the cutter housing to completely surround the periphery of the right and left cutter blades along tip end rotation loci of the blades at a slight distance therefrom. The enclosure wall is formed by side wall portions ar right and left outsides of the cutter housing and front and rear enclosure wall portions hang down from the under surface. The cutter blades rotate in opposite directions from each other so that tip ends of the cutter blades move from front to rear at right and left outsides, respectively, of the mulching mower.
    Type: Grant
    Filed: January 2, 1997
    Date of Patent: April 20, 1999
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Tadashi Yamashita, Kenji Higashi, Yutaka Tabata
  • Patent number: 5788276
    Abstract: In a utility vehicle, a muffler accommodating chamber is defined in front of and below an engine mounted at a front portion of a vehicle frame. A rear wall of the muffler accommodating chamber is formed by a front axle frame which is mounted to extend between both of vertical frame portions of the vehicle frame and supports a front axle beam for rotatably supporting front wheels at its opposite ends. The front axle frame has a function to support the front axle beam, a function as a strength member in the form of a cross member, and a function as a member defining the muffler accommodating chamber. A driving gear is mounted to a steering shaft and thrust-supported by a lower surface of a support portion of a support frame which is fixedly mounted on the vehicle frame. A driven gear meshed with the driving gear and a pitman arm are connected to a rotary shaft whose axially upward movement is limited by the support portion and whose axially downward movement is limited by a bracket mounted to the vehicle frame.
    Type: Grant
    Filed: August 19, 1997
    Date of Patent: August 4, 1998
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Shinji Yamanaka, Masahiro Yamamoto, Toshiharu Nasuno, Tadashi Yamashita
  • Patent number: 5704643
    Abstract: In a utility vehicle, a muffler accommodating chamber is defined in front of and below an engine mounted at a front portion of a vehicle frame. A rear wall of the muffler accommodating chamber is formed by a front axle frame which is mounted to extend between both of vertical frame portions of the vehicle frame and supports a front axle beam for rotatably supporting front wheels at its opposite ends. The front axle frame has a function to support the front axle beam, a function as a strength member in the form of a cross member, and a function as a member defining the muffler accommodating chamber. A driving gear is mounted to a steering shaft and thrust-supported by a lower surface of a support portion of a support frame which is fixedly mounted on the vehicle frame. A driven gear meshed with the driving gear and a pitman arm are connected to a rotary shaft whose axially upward movement is limited by the support portion and whose axially downward movement is limited by a bracket mounted to the vehicle frame.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: January 6, 1998
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Shinji Yamanaka, Masahiro Yamamoto, Toshiharu Nasuno, Tadashi Yamashita
  • Patent number: 5290048
    Abstract: A working fluid circuit for an active suspension control system for an automotive vehicle comprises a pressure source unit which provides pressurized working fluid to actuators, associated with wheels respectively, which are operable to suppress attitude change of a vehicle body, pressure control valves associated with the actuators respectively, and check valves located in a by-pass from an output port to a supply port of the pressure control valve, the supply port communicating with the pressure source through a supply line to which the working fluid is supplied from the pressure source, the output port communicating with the actuator through an output line for outputting the working fluid adjusted at a preselected controlled level to the actuator.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: March 1, 1994
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kenro Takahashi, Tadashi Yamashita
  • Patent number: 4403954
    Abstract: An apparatus for heat-treating pipes comprising a furnace chamber for accommodating a plurality of pipes as arranged in parallel, a chain conveyor disposed in the furnace chamber for transporting the pipes in a direction at right angles to the axes of the pipes, and a plurality of stopper means for stopping the pipes intermittently at suitably spaced-apart positions in the path of transport by the chain conveyor and causing each of the pipes to rotate about its own axis in cooperation with the chain conveyor. Since the pipe is intermittently stopped and rotated about its own axis during heat treatment, the pipe is free of thermal deformation to an elliptical shape. Pipes can be heat-treated in succession in a small space, therefore with a very high efficiency. The motion of the chain conveyor is utilized for rotating the pipe without necessitating any additional device for the rotation.
    Type: Grant
    Filed: July 24, 1981
    Date of Patent: September 13, 1983
    Assignee: Kubota, Ltd.
    Inventors: Hitoshi Kokeguchi, Jiro Yamaguchi, Akinori Sakoda, Mikio Umeda, Tadashi Yamashita, Yoshimasa Katsuki, Mitsuru Murakami, Yasuo Imamura