Patents by Inventor Masanao Okuda

Masanao Okuda 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: 20200037923
    Abstract: The purpose of the present invention is to enable, even in an endoscopic operation, an operation upon a specific operation site while monitoring the overall surgical site, such as an organ. An artificial magnetic field is generated such that a surgical site of a patient is positioned within a generated three-dimensional artificial magnetic field space. A plurality of magnetic sensors are respectively mounted in a plurality of predetermined locations of the surgical site of the patient. Data of a 3-D image of the surgical site and position information of the mounting locations of the magnetic sensors with respect to the surgical site are stored in a storage unit as position information of the mounting locations with respect to the 3-D image of the surgical site.
    Type: Application
    Filed: July 20, 2017
    Publication date: February 6, 2020
    Applicant: University of Tsukuba
    Inventors: Jian LU, Ryutaro MAEDA, Lan ZHANG, Hiroshi HIROSHIMA, Nobuhiro OHKOHCHI, Masanao KURATA, Youichi OKUDA
  • Patent number: 6008714
    Abstract: A thin electromagnetic transducer includes a permanent magnetic plate, a vibratory diaphragm disposed in opposing relation to the permanent magnetic plate, a resilient buffer member interposed between the vibratory diaphragm and the permanent magnetic plate, and a support member for regulating the position of the vibratory diaphragm relative to the permanent magnetic plate. The permanent magnetic plate is of rigid structure, having a parallel striped multipolar magnetized pattern and a plurality of air-discharge through-holes are arranged in neutral zones of the magnetized pattern. The vibratory diaphragm is formed of a thin and soft resin film on which a coil is formed by printing. A linear portion of the conductor pattern is disposed in a position corresponding to the neutral zones of the permanent magnetic plate, and the vibratory diaphragm is supported such that the vibratory diaphragm can displace in a thickness-wise direction.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: December 28, 1999
    Inventors: Masanao Okuda, Tadashi Yoshino
  • Patent number: 5435859
    Abstract: A method of producing a rare earth anisotropic bond magnet comprising the steps of:melting an aloy composed of 10-30 atom % of R (wherein R designates at least one rare earth element including yttrium), 2-28 atom % of boron and 65-82 atom % of M (wherein M designates at least one of iron, cobalt and nickel) and rapidly cooling the melted alloy to produce powder material,subjecting the material to stamping at the temperature of 300.degree.-900.degree. C. in an inert gas atmosphere to pulverize and press the material to a scaly shape andcooling the pulverized material so that a magnetic anisotropy is produced in the vertical direction relative to the pressed surface.
    Type: Grant
    Filed: August 4, 1993
    Date of Patent: July 25, 1995
    Assignee: ERD Corporation
    Inventors: Michihiro Torii, Masanao Okuda, Yoshikazu Ikeda
  • Patent number: 4891567
    Abstract: Herein disclosed is a brushless DC motor of high performance, which has its construction simplified and feasible made by sandwiching an annular coil between two stator yokes having a plurality of magnetic elements in the circumferential direction, by magnetically shorting the two stator yokes through a shorting member, and by providing a magnetic pole detector for detecting the positions of the magnetic poles of a rotor.
    Type: Grant
    Filed: July 12, 1988
    Date of Patent: January 2, 1990
    Assignee: Minebea Co., Ltd.
    Inventors: Sakae Fujitani, Yuzuru Suzuki, Masanao Okuda, Hitoshi Takahashi, Junichiro Fukazawa
  • Patent number: 4376262
    Abstract: There are provided a method of and an apparatus for controlling a pulse controlled brushless motor to immediately pull-in the motor to a predetermined rotational speed. The method has the steps of encoding rotational condition of a rotor into an electric signal, detecting the encoded signal to determine whether the rotor is in rotation or not, synchronizing a signal of a pull-in pulse rate with a clock pulse when the rotor is not in rotation and synchronizing the encoded signal with the clock pulse when the rotor is in rotation to form an input pulse train. The input pulse train is supplied to a peripheral circuit to excite the motor.
    Type: Grant
    Filed: February 26, 1981
    Date of Patent: March 8, 1983
    Assignee: Fuji Electrochemical Co., Ltd.
    Inventors: Masanao Okuda, Wataru Oishi
  • Patent number: 4363984
    Abstract: A brushless motor actuated by a predetermined frequency and driven at constant speed with less wow and flutter component in accordance with a pulse signal of the frequency applied. The motor has a rotor enclosed in a stator, the latter having driving windings. The rotor includes a rotor shaft and a flywheel connected to the shaft. The flywheel is housed in a motor case.
    Type: Grant
    Filed: October 17, 1980
    Date of Patent: December 14, 1982
    Assignee: Fuji Electrochemical Co., Ltd.
    Inventors: Michihiro Torii, Masanao Okuda, Yuzuru Suzuki