Patents by Inventor Shigeru Yamamoto

Shigeru Yamamoto 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).

  • Light modulator
    Publication number: 20010035932
    Abstract: A bright, and contrasty reflective display can be performed without using polarizer films, and display switching can be performed fast. A ferroelectric liquid crystal is sandwiched between substrates, and electrodes are formed face to face with each other in a direction parallel to the substrates. The ferroelectric liquid crystal, when no electric field is applied to it, goes into a planer state in which a helical axis becomes perpendicular to or almost perpendicular to the substrates, selectively reflecting light of specific wavelengths in a visible region. A driving circuit applies an electric field between the electrodes in a direction perpendicular to or almost perpendicular to the helical axis of the ferroelectric liquid crystal in the planer state.
    Type: Application
    Filed: April 26, 2001
    Publication date: November 1, 2001
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Teiichi Suzuki, Takehito Hikichi, Shigeru Yamamoto, Naoki Hiji
  • Method and system for controlling hydraulic driving circuit
    Patent number: 6305164
    Abstract: A method and system for controlling a hydraulic driving circuit, which are simple in structure, capable of readily providing neutral position adjustment, manually adjustable and able to cope with a failure in the circuit. When an adjustment mode for adjusting the neutral position of a steering hydraulic pump is set, an offset command current value is calculated as a command current value to be output to a servo electromagnetic valve, and an offset command value calculated when a steering lever is in its neutral position is output to the servo electromagnetic valve to adjust the neutral position of the steering hydraulic pump.
    Type: Grant
    Filed: September 7, 1999
    Date of Patent: October 23, 2001
    Assignee: Komatsu Ltd.
    Inventors: Shigeru Yamamoto, Toshihiko Fukasawa, Hisao Asada
  • Converter unit of camera
    Patent number: 6308013
    Abstract: A converter unit for a lens unit of a camera, which is able to match optical axes of a plurality of kinds of converter lenses with different magnifications, which are revolvably mounted on a rod, with an optical axis of the lens unit properly. One of the converter lenses is revolvably mounted on the rod by two bearings through a connecting member. One of the bearings is attached on an eccentric external circumference of a collar member attached on the rod. The rotation of the collar member adjusts an eccentric direction of the collar member and the direction of an optical axis of the converter lens.
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: October 23, 2001
    Assignee: Fuji Photo Optical Co., Ltd.
    Inventors: Minoru Tanaka, Shigeru Yamamoto
  • Artificial latticed multi-layer film deposition apparatus
    Patent number: 6270633
    Abstract: The present invention relates to an artificial latticed multi-layer film deposition apparatus for depositing on a substrate a gigantic magneto-resistive effect film (GMR film) having an artificial lattice structure formed of magnetic metal films and non-magnetic metal films alternately laminated one over the other and its object is to provide the artificial latticed multi-layer film deposition apparatus to enable easy and secure deposition of an artificial latticed multi-layer film having GMR characteristics.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: August 7, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuhiro Onaka, Sumio Maekawa, Shigeru Yamamoto, Masafumi Okamoto
  • Steering control system for tracklaying vehicle
    Patent number: 6260642
    Abstract: The modulation characteristic (static characteristic or dynamic characteristic) of a clutch and a brake are changed according to various operating conditions of a vehicle such as a high load driving state, slope traveling state, low engine speed state, and high speed driving state, to enable optimum steering performance that matches each operating condition of the tracklaying vehicle.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: July 17, 2001
    Assignee: Komatsu Ltd.
    Inventors: Shigeru Yamamoto, Koji Okazawa, Satoru Morita
  • Machine fault monitoring apparatus and method
    Patent number: 6256594
    Abstract: Only snapshot data necessary for monitoring faults are collected from machine such as vehicles, allowing faults to be more accurately monitored, and the amount of data and the memory storage volume at a monitoring station to be reduced. The values of a plurality of (A), (B), (C), and (D) operating parameters (engine rotational speed, lever operating position, vehicle speed, and tractive force) which change during the operation of the machine are sequentially detected for each machine. The fault detection history data are thus updated every time a fault (drop in engine oil pressure, overheating) is detected during the operation of the machine.
    Type: Grant
    Filed: August 11, 1998
    Date of Patent: July 3, 2001
    Assignee: Komatsu, Ltd.
    Inventors: Shigeru Yamamoto, Kunihiko Imanishi, Takao Nagai, Sadachika Akiyama, Jiro Akagi, Nobuki Hasegawa, Kazunori Kuromoto, Taku Murakami
  • Vehicle speed detection system
    Patent number: 6230107
    Abstract: Correction for compensating for errors caused by the pitching movement of a vehicle is executed with high accuracy at low cost. The ground speed of the vehicle sensed by a Doppler sensor is corrected with angular velocities with respect to the center of gravity of the vehicle. In this correction, the center of rotation of the vehicle and the rotation of the Doppler sensor itself during the pitching movement of the vehicle are taken into account.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: May 8, 2001
    Assignee: Komatsu Ltd.
    Inventors: Shigeru Yamamoto, Hidekazu Nagase, Yasuo Kitahara
  • Dozing device for bulldozer
    Patent number: 6181999
    Abstract: A dozing system for a bulldozer capable of providing high operational efficiency in dozing operation and a smooth excavation face. If it is determined when operation is performed in an automatic digging mode that the load exerted on the blade is stable, a target position for the cutting edge relative to the ground is corrected to the actual position of the cutting edge at that time. According to the ratio of the amount of excavated soil loaded on the front surface of the blade to the loading capacity of the blade front surface and/or the stability of the load exerted on the blade, a switching is performed between a weight characteristic for the operation amount of the load control and a weight characteristic for the operation amount of the smoothing control.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: January 30, 2001
    Assignee: Komastsu Ltd.
    Inventors: Shigeru Yamamoto, Hidekazu Nagase
  • Film applying apparatus
    Patent number: 6176286
    Abstract: A film applying apparatus 10 is provided with preparatory bonding rolls 20A, 20B and laminating rolls 21A, 21B, and a laminated film 12 wound out from a film roll 18 and a substrate 16 conveyed by a substrate conveying device 14 pass between these rolls and pressure bonding is performed. Diameter of the preparatory bonding rolls 20A, 20B is made smaller than diameter of the laminating rolls 21A, 21B and range of elastic deformable area S1 at the roll surface at grasping starting of the substrate and the laminated film 12 by the preparatory bonding rolls 20A, 20B is made small thereby range of generating, air holding or the like is limited to small.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: January 23, 2001
    Assignee: Somar Corporation
    Inventors: Kenji Kitagawa, Shigeru Yamamoto
  • Process for purification of methylal
    Patent number: 6160185
    Abstract: Provided is a process for high purification of methylal by removing water and methanol present as impurities from the methylal. The process for purification of methylal comprises subjecting a methylal gas containing water and methanol and a polyalkylene glycol or a derivative thereof to gas-liquid counter current contact to remove the water and methanol.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: December 12, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yoshio Tanaka, Shigeru Yamamoto
  • Method and apparatus for determining machine maintenance due times
    Patent number: 6141629
    Abstract: Maintenance due times of components of a machine are determined according to the status of user-performed in-house maintenance and according to the occurrence of abnormalities during machine operation. A subtraction point (20 points) associated with an abnormality (overheating) detected during machine operation is subtracted from the score (80 points) of a corresponding component (engine) in the machine. An addition point (50 points) associated with the type of maintenance (overhaul performed by in-house maintenance) indicated in maintenance information is added to the score (80 points). Thus, at the time where the value resulting from subtractions from and additions to the score for that component (engine) reaches a prescribed value (10 points) indicating maintenance due time, it is determined that the maintenance due time for that component (engine) has been reached.
    Type: Grant
    Filed: July 13, 1998
    Date of Patent: October 31, 2000
    Assignee: Komatsu Ltd.
    Inventors: Shigeru Yamamoto, Kunihiko Imanishi, Takao Nagai, Sadachika Akiyama, Jiro Akagi, Nobuki Hasegawa, Kazunori Kuromoto, Taku Murakami
  • Film applying apparatus
    Patent number: 6136142
    Abstract: A film applying apparatus is provided with preparatory bonding rolls, laminating rolls, a laminated film wound out from a film roll and a substrate conveyed by a substrate conveying device. The laminated film passes between these rolls and pressure bonding is performed. The diameter of the preparatory bonding rolls is made smaller than the diameter of the laminating rolls. The range of the elastically deformed area at the roll surface where the grasping of the substrate and the laminated film by the preparatory bonding rolls is begun, is made small, thereby limiting the range and reducing the generated amount of air holding or the like.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: October 24, 2000
    Assignee: Somar Corporation
    Inventors: Kenji Kitagawa, Shigeru Yamamoto
  • Hydraulic system for bulldozer
    Patent number: 6129158
    Abstract: An extensive torsional force exerted on a vehicle body frame due to an operation of blade lift cylinders can be avoided. Determination is made to identify an occurrence condition which causes a torsional force on a vehicle body frame due to an operation of the blade lift cylinders 9. If a condition which causes a torsional force is identified, pressure oil supplied to the blade lift cylinders 9 through a lift control valve 26 is interrupted, thereby stopping the operation of the blade lift cylinders 9. Alternatively, the operation speed of the blade lift cylinders 9 may be reduced by limiting the flow rate of pressure oil supplied to the blade lift cylinders 9.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: October 10, 2000
    Assignee: Komatsu Ltd.
    Inventors: Shigeru Yamamoto, Hidekazu Nagase
  • Fishing rod having improved gripping portion
    Patent number: 6105302
    Abstract: In a fishing rod having a reel seat on a rod pipe, the fishing rod has a finger trigger on the side which is opposite to the side where the reel seat is provided, in such a manner that the finger trigger is so positioned and configured as to allow an angler to cast the fishing line while palming the fishing rod and a reel mounted on the reel seat with one hand.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: August 22, 2000
    Assignee: Daiwa Seiko, Inc.
    Inventors: Shigeru Yamamoto, Teiji Matsubara, Mitsuyoshi Oyama
  • Polymer dispersion type liquid crystal element and manufacturing method thereof
    Patent number: 6083575
    Abstract: A polymer dispersion type liquid crystal element having a sufficient reflectance and having a layered structure in which a refractive index changes periodically inside, as well as a manufacturing method thereof. The polymer dispersion type liquid crystal element is manufactured by applying laser interference light to a polymerizable composition containing a polymerizable compound having a photo-dimerizable structure and low molecular liquid crystals to conduct polymer phase separation and then applying polarized light to manufacture a polymer dispersion type liquid crystal element in which low molecular liquid crystals are oriented.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: July 4, 2000
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masanobu Ninomiya, Shigeru Yamamoto, Takehito Hikichi, Kiyosui Sagawa, Naoki Hiji, Tei-ichi Suzuki
  • Control device for bulldozer blade and its control method
    Patent number: 6035241
    Abstract: A control device and its method by which interference between a blade (10) of a bulldozer and a vehicle body can be prevented even when a pitch back angle of the blade (10) is made large and a tilt speed is increased to greatly change a tilt angle. Therefore, the device comprises left and right detecting means (20a, 20b, 23a, 23b) for detecting an amount of tilt of the blade (10), left and right tilt limiting valves (37, 38) connected to operating units (35a, 35b) of first and second directional control valves (35, 36), and a controller (50) outputting a command to the left and right tilt limiting valves (37, 38) so as to stop a tilting action of the blade (10) when a difference between amounts of tilt detected by the left and right detecting means (20a, 20b, 23a, 23b) reaches a predetermined limit value.
    Type: Grant
    Filed: September 23, 1997
    Date of Patent: March 7, 2000
    Assignee: Komatsu Ltd.
    Inventor: Shigeru Yamamoto
  • System for determining the position of a bulldozer
    Patent number: 6035249
    Abstract: An improved accuracy is ensured for the calculation of the travel distance of a bulldozer by obtaining the accurate vehicle speed and travel direction of the bulldozer. To this end, arrangement is made such that a check is made to determine whether actual tractive force F exerted on the blade exceeds a predetermined shoe slip threshold value F.sub.0 ; switching between vehicle speed detectors (between a Doppler sensor and Sprocket rotating speed detector) is made according to the determination so that suitable one of the vehicle speed detectors detects the vehicle speed of the bulldozer; and the vehicle speed detected by the selected vehicle speed detector is integrated, whereby the travel distance of the bulldozer is calculated.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: March 7, 2000
    Assignee: Komatsu Ltd.
    Inventors: Shigeru Yamamoto, Hidekazu Nagase
  • Ship position control system
    Patent number: 6032087
    Abstract: A bowthruster is operated by a control unit with wind direction based on a detection signal from vane-anemometer. A bow in a hull attitude is slightly adjusted so as to direct a bow of the hull to windward. At the same time, a propulsion unit is operated by control unit in accordance with wind strength based on a detection signal from vane-anemometer. A hull position is slightly adjusted such that the hull is moved based on a distance carried away by wind. Rocking of the hull is reduced by always directing the bow to windward and also the hull is stayed at a constant point located directly over shoal of fish or gathering place for fish so as to enable the pleasant fishing. Accordingly, because of good control response and fine ship position adjustment, the hull is positioned quickly in a fishery and then maintained at a predetermined point in the fishery.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: February 29, 2000
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Shigeru Yamamoto
  • Reel seat for fishing rod
    Patent number: D436646
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: January 23, 2001
    Assignee: Daiwa Seiko, Inc.
    Inventors: Mitsuyoshi Oyama, Shigeru Yamamoto, Yoshiharu Kiyota, Teiji Matsubara, Kaname Yamaguchi
  • Reel seat for fishing rod
    Patent number: D418194
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: December 28, 1999
    Assignee: Daiwa Seiko, Inc.
    Inventors: Mitsuyoshi Oyama, Shigeru Yamamoto, Teiji Matsubara