Patents by Inventor Youichi Watanabe

Youichi Watanabe 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: 6089536
    Abstract: Disclosed is a motor-operated flow control valve for internal combustion engines which has a longer useful life and does not cause a drop of torque generated by a motor at the start-up. A rotor shaft (9) is reciprocated with rotating motion of a motor (32), whereupon a valve head (2a) is moved to open and close an orifice for control of a flow rate. Specific frequency of a rotor unit (33) of the motor (32) is set to be higher than the secondary vibration frequency of rotation of a 4-cycle internal combustion engine. The rotor unit (33) comprises an integral magnet (25), a single ball bearing (27) and a resin-made magnet holder (26) for supporting these two members, the magnet, the ball bearing and the magnet holder being formed into an integral structure. The rotor unit is supported such that an outer race (27c) of the ball bearing (27) is held at its one end against an inner peripheral wall of a housing resin (14) and a preload is applied to the other end of the outer race (27c).
    Type: Grant
    Filed: July 21, 1997
    Date of Patent: July 18, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Youichi Watanabe, Yasuyuki Nakano, Masayuki Suganami, Kzunori Irifune
  • Patent number: 6002810
    Abstract: There is disclosed a resolution conversion apparatus for converting an original digital image into a digital image having a different number of pixels in accordance with an instructed conversion magnification factor. In the apparatus, a determination circuit determines the number of pixels to be interpolated in each block of the original image and positions where they are interpolated in accordance with the conversion magnification factor. The block includes a predetermined number of pixels of the original image. A converted image generation circuit generates pixel data for the interpolation pixels at the positions where they are interpolated in accordance with a predetermined interpolation equation whose coefficients are determined with the positions and data values of the pixels in the block, and combines the pixel data for the digital original image and the generated pixel data to output a converted digital image. The interpolation equation includes spline functions and Bezier functions.
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: December 14, 1999
    Assignees: Hitachi, Ltd., Hitachi Device Enginnering Co., Ltd.
    Inventors: Shinji Wakisawa, Naruhiko Kasai, Hiroko Sato, Youichi Watanabe, Hiroyuki Koizumi
  • Patent number: 5633671
    Abstract: A recording apparatus includes a heat generating element which is driven to generate heat and thereby effect image recording on a recording medium. In the apparatus, a reference voltage for driving the heat generating element is set, and a driving voltage based on the reference voltage is output. A signal is detected which corresponds to an amount of electric power supplied to the heat generating element during image recording. A control unit controls the outputting of the driving voltage based on the amount of electric power, and adjusts the energy to be applied to the heat generating element.
    Type: Grant
    Filed: January 2, 1996
    Date of Patent: May 27, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventor: Youichi Watanabe
  • Patent number: 5533819
    Abstract: A thermal recording device suitable for use in an electronic typewriter for printing characters on a printing paper by means of an ink sheet. The device has a thermal recording head adapted to be pressed onto the printing paper through the ink sheet so as to print the characters on the printing paper. The ink sheet is adapted to be fed by a reversible winding device. The recording device further has a first detector for detecting the length of the ink sheet fed by the feeding device in a period between a moment at which the feeding is commenced and a moment at which the thermal recording head reaches the first image recording position, and a second detector for detecting the length of the ink sheet fed by the feeding device in a period between a moment at which the thermal recording head leaves the final image recording position and a moment at which the thermal recording head is stopped.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: July 9, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Youichi Watanabe, Toshihide Wada
  • Patent number: 5214120
    Abstract: A dope for forming elastic polyurethane articles is prepared by using a polyol, a diisocyanate and a diamine. A solvent and a terminating agent comprising a secondary monoamine and a ketoimineamine and/or an aldoimine-amine may also be employed.
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: May 25, 1993
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Youichi Watanabe, Yoshikazu Arimatsu, Hajime Suzuki
  • Patent number: 5109236
    Abstract: A smoothness measuring device for measuring the smoothness of a surface to be measured has a light source for applying a light to the surface to be measured from an oblique direction thereto, a first detector for detecting the quantity light from the light source being reflected by the surface to be measured, a second detector for detecting the quantity of light from the light source being reflected by the surface to be measured, and a judging circuit for judging the smoothness of the surface to be measured on the basis of the results of the first and second detectors.
    Type: Grant
    Filed: August 25, 1989
    Date of Patent: April 28, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Youichi Watanabe, Junichi Yoshikawa
  • Patent number: 4917848
    Abstract: Process for producing polyester fibers of high tenacity and high modulus, by melt-spinning a polyester having an intrinsic viscosity of not lower than 0.3, to obtain extruded filaments of low orientation having a birefringence not higher than 10.0.times.10.sup.-3, post-polymerizing the filaments in a heating medium, and subjecting the filaments to multi-stage drawing in at least two stages.
    Type: Grant
    Filed: January 10, 1989
    Date of Patent: April 17, 1990
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Kazuo Kurita, Youichi Watanabe, Susumu Tate
  • Patent number: 4758117
    Abstract: The invention provides an efficient method for controlling the flow rate of a particulate material through a pneumatic transportation pipe at a preset value with a high accuracy and rapid response to an external disturbance added to the system by controlling the flow rate of the booster gas. Different from conventional methods in which the flow rate of the booster gas is controlled with the feedforward factor of the variation in the actual flow rate of the particulate material, the inventive method utilizes the variation in the pressure in the receiving unit as the feedback to control the flow rate of the booster gas so that the above mentioned advantages are obtained in the accuracy of control and rapidness of the response to an external disturbance.
    Type: Grant
    Filed: October 17, 1985
    Date of Patent: July 19, 1988
    Assignees: Kawasaki Steel Corp., Denka Consultant & Engineering Co., Ltd.
    Inventors: Yunosuke Maki, Youichi Watanabe, Yasuhiko Sakaguchi, Kazuaki Tanaka, Yuichi Kobayashi, Hideo Ooishi, Minoru Kobayashi
  • Patent number: 4742151
    Abstract: A novel ultra-high-molecular-weight polyester prepared from aromatic dicarboxylic acid or alkyl ester thereof and alkylene glycol, and having intrinsic viscosity of not less than 1.5 and insoluble polymer content of not more than 10% by weight.
    Type: Grant
    Filed: April 23, 1987
    Date of Patent: May 3, 1988
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Susumu Tate, Haruhiko Narusawa, Youichi Watanabe, Akira Chiba
  • Patent number: 4689528
    Abstract: A velocity of a motor which selects a type element of a type head or a motor which drives a carrier carrying the type head in a printer is controlled in accordance with a positional error which represent a distance from a present position to a target print position of the type head or the carrier. When the motor is stopped at a desired position, it is appropriately damped.
    Type: Grant
    Filed: October 25, 1985
    Date of Patent: August 25, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventor: Youichi Watanabe
  • Patent number: 4186593
    Abstract: A drive simulator operating method for permitting a test vehicle to run on a dynamometer system under conditions equivalent to actual vehicle running conditions. The drive simulator is operated under road load control on the basis of the data stored in a memory while the test vehicle runs on the dynamometer system under road load control in accordance with road load command values stored in a data recorder during actual running of the test vehicle on a test course.
    Type: Grant
    Filed: August 14, 1978
    Date of Patent: February 5, 1980
    Assignee: Kabushiki Kaisha Meidensha
    Inventor: Youichi Watanabe