Patents by Inventor Kazuhiko Fujita

Kazuhiko Fujita 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: 20060112699
    Abstract: The present invention provides a freezer capable of preventing/restraining quality of foods from being deteriorated, freezing method, and frozen objects manufactured using the freezer and freezing method. The freezer 10 comprises a freezer main body 101, a cluster fragmenting device 1A for fragmenting water clusters contained in the objects 5, a loading part 7 for loading the objects 5, a heat exchanger 8 and a cold gas supply device. The cold gas supply device comprises a dehumidifying device 11 for dehumidifying a cold gas heat-exchanged by the heat exchanger 8, and a fan 9 for-circulating dehumidified cold gas to maintain the inside of the freezer 101 in a dry state. Further, the cluster fragmenting device 1A includes plural magnetic field generating devices 2 that imparts magnetic fields to the objects 5 containing water and changes the strength of magnetic fields with time elapsed.
    Type: Application
    Filed: May 8, 2003
    Publication date: June 1, 2006
    Applicant: GLOCAL CO., LTD
    Inventors: Motohiko Sato, Kazuhiko Fujita
  • Patent number: 7051834
    Abstract: In a power steering apparatus, a basic-target-rotational-speed setting portion 42 sets a basic target rotational speed Rb of an electric motor 27 on the basis of the vehicle speed and the angular velocity of steering. A temperature-coefficient setting portion 43 sets a temperature coefficient a which becomes smaller with an increase in the temperature. A target-rotational-speed setting portion 44 sets a target rotational speed R of the electric motor 27 on the basis of the formula R=?·Rb. A motor-drive control portion 45 controls a drive circuit 28 so that this target rotational speed R will be attained.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: May 30, 2006
    Assignee: Koyo Seiko Co., Ltd.
    Inventor: Kazuhiko Fujita
  • Publication number: 20050257994
    Abstract: In a power steering apparatus, a basic-target-rotational-speed setting portion 42 sets a basic target rotational speed Rb of an electric motor 27 on the basis of the vehicle speed and the angular velocity of steering. A temperature-coefficient setting portion 43 sets a temperature coefficient a which becomes smaller with an increase in the temperature. A target-rotational-speed setting portion 44 sets a target rotational speed R of the electric motor 27 on the basis of the formula R=?·Rb. A motor-drive control portion 45 controls a drive circuit 28 so that this target rotational speed R will be attained.
    Type: Application
    Filed: July 29, 2005
    Publication date: November 24, 2005
    Applicant: Koyo Seiko Co., Ltd.
    Inventor: Kazuhiko Fujita
  • Patent number: 6945351
    Abstract: In a power steering apparatus, a basic-target-rotational-speed setting portion 42 sets a basic target rotational speed Rb of an electric motor 27 on the basis of the vehicle speed and the angular velocity of steering. A temperature-coefficient setting portion 43 sets a temperature coefficient ? which becomes smaller with an increase in the temperature. A target-rotational-speed setting portion 44 sets a target rotational speed R of the electric motor 27 on the basis of the formula R=?·Rb. A motor-drive control portion 45 controls a drive circuit 28 so that this target rotational speed R will be attained.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: September 20, 2005
    Assignee: Koyo Seiko Co., Ltd.
    Inventor: Kazuhiko Fujita
  • Publication number: 20050004952
    Abstract: A transaction of processing a database distributed to a plurality of servers in a chain of local transactions individually processed by and in each server. In each server, when the processing of a local transaction in the server is completed, the local transaction is committed or rolled back, and the right to execute a process of an application is released. Until all chained transactions are completed, the exclusive control of data accessed in the local transactions and the data before update of updated data is managed in a log, thereby guaranteeing the consistency and integrity of the data.
    Type: Application
    Filed: May 21, 2004
    Publication date: January 6, 2005
    Inventors: Masahiro Suzuki, Kazuhiko Fujita, Shinichi Kariya
  • Publication number: 20030024758
    Abstract: In a power steering apparatus, a basic-target-rotational-speed setting portion 42 sets a basic target rotational speed Rb of an electric motor 27 on the basis of the vehicle speed and the angular velocity of steering. A temperature-coefficient setting portion 43 sets a temperature coefficient &agr; which becomes smaller with an increase in the temperature. A target-rotational-speed setting portion 44 sets a target rotational speed R of the electric motor 27 on the basis of the formula R=&agr;·Rb. A motor-drive control portion 45 controls a drive circuit 28 so that this target rotational speed R will be attained.
    Type: Application
    Filed: August 2, 2002
    Publication date: February 6, 2003
    Applicant: Koyo Seiko Co., Ltd.
    Inventor: Kazuhiko Fujita
  • Patent number: 6411985
    Abstract: An interserver data association apparatus capable of making data association with respect to a plurality of reception servers based on data transmitted from one transmission server. Transaction information about the manipulation of a database sent from a main center is received by an acquisition unit in the interserver data association apparatus. The data received by this acquisition unit is transferred to individual distribution buffers in a distribution unit. This distribution unit has information about the timings of data transmission requested by the individual reception servers. At the timing each reception server requests, therefore, the distribution unit transfers the transaction information stored in the distribution buffer associated with each reception server to that reception server.
    Type: Grant
    Filed: November 18, 1997
    Date of Patent: June 25, 2002
    Assignee: Fujitsu Limited
    Inventors: Kazuhiko Fujita, Toshiaki Kakisu, Yasuhiko Hashizume, Yuki Shinomiya
  • Patent number: 6216814
    Abstract: A power steering apparatus which generates a steering assist force by a hydraulic pressure of a pump driven by an electric motor. The apparatus includes: an electric current sensor for sensing an electric current flowing through the electric motor; and a control circuit for switching a voltage to be applied to the electric motor from a standby voltage to an assist voltage if the motor current is higher than a first threshold or if a change rate of the motor current is higher than a second threshold.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: April 17, 2001
    Assignee: Koyo Seiko Co., Ltd.
    Inventors: Kazuhiko Fujita, Tsuyoshi Nakajima
  • Patent number: 6161069
    Abstract: A power steering apparatus according to the present invention, when an electric motor M is actuated, senses an electric current flowing through the electric motor, then determines a temperature rise value with respect to an oil temperature as a time-based sum of temperature increase rates each corresponding to the amount of heat generated in a driver element (31) per unit time by the electric current, and estimates the oil temperature on the basis of the temperature rise value and the temperature of the driver element (31). Thus, the oil temperature can be estimated without the use of an oil temperature sensor. This allows for motor actuation even at an extremely low temperature.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: December 12, 2000
    Assignee: Koyo Seiko Co., Ltd.
    Inventor: Kazuhiko Fujita
  • Patent number: 5882408
    Abstract: A coating system of a liquid to a sheet material. The system includes a tank 1, a feed pump 4, a feed control valve 8 including a liquid drawing or sucking back mechanism, and a slit die 9 for applying the liquid to the sheet, which are connected with each other by means of a first, second and a third feed conduits 3, 5 and 7. A first return conduit 11 with a return control valve 10 and a second return conduit 12 are provided between the feed pump 4 and the feed control valve 8 for returning the liquid to the tank 1. Electromagneticvalves 15 and 17 operated by a control apparatus 22 are provided for switching instantaneously the conduits between the feed control valve and the return control valve 10.
    Type: Grant
    Filed: September 4, 1997
    Date of Patent: March 16, 1999
    Assignee: Toray Engineering Co., Ltd.
    Inventor: Kazuhiko Fujita
  • Patent number: 5845117
    Abstract: Start, commit and abort of transactions in a computer system are managed by a task manager. When a certain transaction locks a certain resource, this information is registered in a lock manager. Accordingly, when a transaction requests for gaining a resource, the lock manager can determine that the resource is already locked, if any, by another transaction. In such a case, the transaction should wait for the termination of the other transaction, so that this information is registered in a wait-for-graph table. A deadlock detector determines whether the deadlock is caused according to the registered information in the wait-for-graph table.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: December 1, 1998
    Assignee: Fujitsu Limited
    Inventor: Kazuhiko Fujita
  • Patent number: 5061071
    Abstract: Method and apparatus for detecting the roughness or undulation of a subject surface, by using a light beam which is converged on the subject surface by an object lens and which is reflected by the subject surface. A relative position between the object lens and the subject surface in the direction parallel to the optical axis of the lens is controlled so that the measuring light reflected by the subject surface has a plane wave. On the other hand, an amount of relative displacement between the object lens and the subject surface is detected, based on a heterodyne interference between a light beam reflected by a stationary mirror and a light beam reflected by a movable mirror which is moved as the relative position is changed. The surface condition is detected based on the amount of relative displacement between the object lens and the subject surface which is detected when said plane wave of said measuring light beam is obtained.
    Type: Grant
    Filed: December 20, 1989
    Date of Patent: October 29, 1991
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Kazuhiko Fujita, Yoshinori Bessho
  • Patent number: 4995726
    Abstract: The surface profile measuring device utilizing optical heterodyne interference comprising a laser source for emitting a laser beam, an object lens for converging the laser beam on the surface of an object to be measured, the laser beam being reflected from the surface of the object while provided with information on a surface profile of the object, an optical heterodyne interference device for allowing the reflected beam to interfere with a reference beam having a frequency different from that of the reflected beam to generate beat signals having the information on the surface profile of the object, a circuit for measuring the surface profile of the object on the basis of phase variation of the beat signals, a driving device including a piezoelectric element for relatively moving one of the object lens and the object to be measured in the direction of the optical axis of the laser beam incident on the surface, and a control device for controlling the driving device on the basis of the phase difference or ampl
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: February 26, 1991
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Kazuhiko Fujita, Yoshinori Bessho