Patents by Inventor Yoshitaka Takahashi

Yoshitaka Takahashi 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: 20050092220
    Abstract: A solid fuel burner using a low oxygen concentration gas as a transporting gas of a low grade solid fuel such as brown coal or the like and a combustion method using the solid fuel burner are provided. The solid fuel burner comprises a means for accelerating ignition of the fuel and a means for preventing slugging caused by combustion ash from occurring. Mixing of fuel and air inside a fuel nozzle 11 is accelerated by that an additional air nozzle 12 and a separator 35 for separating a flow passage are arranged in the fuel nozzle 11, and the exit of the additional air nozzle 12 is set at a position so as to overlap with the separator 35 when seeing from a direction perpendicular to a burner axis, and additional air is ejected in a direction nearly perpendicular to a flow direction of a fuel jet flowing through the fuel nozzle 11. An amount of air from the additional air nozzle 12 is varied corresponding to a combustion load.
    Type: Application
    Filed: December 15, 2004
    Publication date: May 5, 2005
    Inventors: Hirofumi Okazaki, Masayuki Taniguchi, Toshikazu Tsumura, Yoshitaka Takahashi, Kouji Kuramashi
  • Publication number: 20050078892
    Abstract: A linear motion guide unit is disclosed which makes it possible to a long-lasting steady application of lubricant and also makes sure of preventing effectively occurrence of particles of dirt. The linear motion guide unit is comprised of a guide member, more than one rolling element, and a slider supported for linear movement along the guide track rail by virtue of rolling elements, the slider being made therein with a fore-and-aft hole in which a sleeve fits to allow the rolling elements to roll through there. The sleeve is made of a cellular member impregnated with lubricant in vacuum atmosphere.
    Type: Application
    Filed: October 5, 2004
    Publication date: April 14, 2005
    Applicant: Nippon Thompson Co.,Ltd.
    Inventors: Yoshitaka Takahashi, Kazunori Hayashida, Akihiko Kamimura
  • Publication number: 20050028716
    Abstract: Disclosed is a sewing machine having a pattern selecting device including a pattern selecting dial and an electronic indicator for indicating a pattern selected by the pattern selecting device. More particularly, the pattern selecting device includes a mode switch 2 which is rotated by a pattern selecting dial 5 and has a plurality of switches Sw arranged in coaxial circles, a plurality of projections 2c arranged in coaxial circles, and an electronic indicator 10. A pattern is optionally selected by the projections 2c and switches Sw which are turned on in optional combination by rotation of the mode switch 2, and the selected pattern is indicated at the electronic indicator 10.
    Type: Application
    Filed: July 21, 2004
    Publication date: February 10, 2005
    Inventors: Yoshitaka Takahashi, Takehiro Kodama, Shunichi Okaya, Koshiro Omiya
  • Publication number: 20040231572
    Abstract: A fuel supply duct, which supplies a mixed fluid of a solid fuel and carrier gas to one or more burners provided on the walls of a furnace, is provided with a branching part, and each of a plurality of branch ducts, which branch out from the branching part, is connected to a corresponding burner. Also a damper, with which the tilt angle with respect to the direction of flow of the mixed fluid can be changed, is positioned in the fuel supply duct at the upstream side of the branching part so that a mutual difference will arise in the solid fuel concentrations of the mixed fluid supplied to the respective branch ducts. A fuel distributor for fuel supply duct is thus arranged. The tilt angle of the above-mentioned damper is adjusted to increase the concentration of solid fuel in the mixed fluid supplied to a specific burner. At a burner to which the high solid fuel concentration is supplied, stability of ignition and stable combustion of the ignited flame can be obtained during low load operation.
    Type: Application
    Filed: August 22, 2003
    Publication date: November 25, 2004
    Inventors: Yoshinori Ohtani, Hidehisa Yoshizako, Hiroaki Kanemoto, Yutaka Takeno, Yoshio Shimogori, Toshikazu Tsumura, Yoshitaka Takahashi
  • Publication number: 20040211345
    Abstract: A solid fuel burner using a low oxygen concentration gas as a transporting gas of a low grade solid fuel such as brown coal or the like and a combustion method using the solid fuel burner are provided. The solid fuel burner comprises a means for accelerating ignition of the fuel and a means for preventing slugging caused by combustion ash from occurring. Mixing of fuel and air inside a fuel nozzle 11 is accelerated by that an additional air nozzle 12 and a separator 35 for separating a flow passage are arranged in the fuel nozzle 11, and the exit of the additional air nozzle 12 is set at a position so as to overlap with the separator 35 when seeing from a direction perpendicular to a burner axis, and additional air is ejected in a direction nearly perpendicular to a flow direction of a fuel jet flowing through the fuel nozzle 11. An amount of air from the additional air nozzle 12 is varied corresponding to a combustion load.
    Type: Application
    Filed: November 13, 2002
    Publication date: October 28, 2004
    Applicants: Hitachi, Ltd., Babcock-Hitachi K.K.
    Inventors: Hirofumi Okazaki, Masayuki Tanaiguchi, Toshikazu Tsumura, Yoshitaka Takahashi, Kouji Kuramashi
  • Patent number: 6792583
    Abstract: In an information processing apparatus, a user having no knowledge of a designer of an LSI modifies a floorplan of the LSI without deteriorating the performance of the LSI. The designer who designs the LSI uses a circuit designing apparatus to store circuit information including a functions of each of blocks constituting the LSI, a floorplan regarding allocation of the blocks, and evaluation indices which are the know-how of the designer, with being associated with each other. The user uses a floorplan modifying apparatus to modify the floorplan and to evaluate the modified floorplan according to the evaluation indices.
    Type: Grant
    Filed: February 11, 2000
    Date of Patent: September 14, 2004
    Assignee: Renesas Technology Corp
    Inventors: Yoshitaka Takahashi, Kotaro Shimamura, Takashi Hotta, Teppei Hirotsu, Katsuichi Tomobe
  • Publication number: 20040164765
    Abstract: Consumption power control is provided for a system LSI made of a combination of a plurality of reusable logic circuit modules, i.e., Intellectual Property (IP) cores. Hardware resources such as interfaces and registers for the consumption power control of other IP cores are prepared and controlled by software for the consumption power control of a system LSI. The consumption power can be controlled at an IP core level. A method is provided which facilitates a system LSI designer to enter a consumption power control specification of a system LSI when the system LSI is configured.
    Type: Application
    Filed: February 24, 2004
    Publication date: August 26, 2004
    Inventors: Yoshitaka Takahashi, Masahiko Saito, Hidemitsu Naya, Mutsumi Kikuchi, Takashi Hotta
  • Patent number: 6778451
    Abstract: A semiconductor storage device conducts a late-write operation. The semiconductor storage device comprises: a memory core circuit storing data; a data latch circuit storing preceding data corresponding to a preceding write-operation; an address compare circuit comparing a preceding address corresponding to the preceding write-operation and a present address corresponding to a present read-operation so as to determine whether the preceding address and the present address match each other; and a control circuit. The control circuit controls a test read-operation to read data from the memory core circuit regardless of whether the preceding address and the present address match each other.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: August 17, 2004
    Assignee: Fujitsu Limited
    Inventors: Yoshitaka Takahashi, Hitoshi Ikeda, Shinya Fujioka
  • Publication number: 20040141871
    Abstract: The present invention is an apparatus for filling a multi-powder including a powder box (10) including a plurality of powder chambers storing a plurality of powders whose constituent compositions differ in a divided manner, and a gas feed pipe (14) disposed on the bottom side of the powder chamber and having an introducing hole for introducing a gas, wherein it can fill a plurality of the powders into a cavity (24) at once through the bottom openings of the powder box by introducing a gas through the introducing hole to substantially equalize the respective flow resistances of a plurality of the powders. Thus, it is possible to fill the powders whose constituent compositions differ at once without disposing them in a mixed manner.
    Type: Application
    Filed: October 27, 2003
    Publication date: July 22, 2004
    Inventors: Mikio Kondo, Hiroshi Okajima, Yoshitaka Takahashi
  • Publication number: 20040118206
    Abstract: A tuning-fork type vibration gyro enables to suppress pyroelectric noise caused by temperature change and to obtain sensor output having high signal-to-noise ratio. The tuning-fork type vibration gyro includes a tuning-fork type vibration body having two arms mutually disposed in parallel and a base for commonly supporting one end of the each arm, wherein a longitudinal direction of the two arms is defined as a z-axis and a perpendicular direction thereto is defined as an x-axis; driving electrodes respectively formed on the two arms for generating vibration of the two arms in a direction parallel to the x-axis; detecting electrodes respectively formed on the two arms for detecting electromotive force generated when the tuning-fork type vibration body is rotated around the z-axis; and dummy electrodes formed on the two arms in respective areas different from the driving electrodes and the detecting electrodes.
    Type: Application
    Filed: July 24, 2003
    Publication date: June 24, 2004
    Applicant: Fujitsu Media Devices Limited
    Inventors: Kazuhiro Ohta, Masanori Yachi, Yoshitaka Takahashi, Kazutsugu Kikuchi, Keiji Saito
  • Patent number: 6718426
    Abstract: A cache memory apparatus is provided with a cache memory for storing thereinto at least one of information about an instruction group related to a system control and information about a data group, an address managment table for managing both an address and a range with respect to the cache memory into which the information is stored, and a selection circuit for selecting the cache memory in response to an access to the address management table. As a result, information related to a system control is stored into the cache memory apparatus.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: April 6, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Hidemitsu Naya, Hideyuki Okamoto, Koji Kawaki, Yuji Sugaya, Yuichiro Morita, Yoshitaka Takahashi
  • Patent number: 6715432
    Abstract: According to a burner of the present invention, a stable combustion is obtained in a wide range from a high-load operation condition to a low-load operation condition even in the case of low quality solid fuel such as brown coal. The amount of air supplied from additional air holes or additional air nozzles 12 can be adjusted depending on the combustion load of furnace 41. At a low load, the amount of air supplied from additional air holes or additional air nozzles 12 is increased, whereby the oxygen concentration in a recirculation zones 19 formed downstream of the outside of a fuel nozzle 11 exit, permits a stable combustion. At a high load, the amount of air supplied from additional air holes or additional air nozzles 12 is reduced, whereby a flame is formed in a position far from the fuel nozzle 11. This suppresses thermal radiation onto a solid fuel burner 42 structure and a furnace 41 wall.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: April 6, 2004
    Assignee: Babcock-Hitachi Kabushiki Kaisha
    Inventors: Toshikazu Tsumura, Hirofumi Okazaki, Miki Shimogori, Kenji Kiyama, Kouji Kuramashi, Hitoshi Kikuchi, Yoshitaka Takahashi, Shigeki Morita, Kazuhito Sakai, Masayuki Taniguchi, Hironobu Kobayashi
  • Patent number: 6717434
    Abstract: Consumption power control is provided for a system LSI made of a combination of a plurality of reusable logic circuit modules, i.e., Intellectual Property (IP) cores. Hardware resources such as interfaces and registers for the consumption power control of other IP cores are prepared and controlled by software for the consumption power control of a system LSI. The consumption power can be controlled at an IP core level. A method is provided which facilitates a system LSI designer to enter a consumption power control specification of a system LSI when the system LSI is configured.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: April 6, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Yoshitaka Takahashi, Masahiko Saito, Hidemitsu Naya, Mutsumi Kikuchi, Takashi Hotta
  • Patent number: 6700816
    Abstract: A semiconductor storage device conducts a late-write operation. The semiconductor storage device comprises: a memory core circuit storing data; a data latch circuit storing preceding data corresponding to a preceding write-operation; an address compare circuit comparing a preceding address corresponding to the preceding write-operation and a present address corresponding to a present read-operation so as to determine whether the preceding address and the present address match each other; and a control circuit. The control circuit controls a test read-operation to read data from the memory core circuit regardless of whether the preceding address and the present address match each other.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: March 2, 2004
    Assignee: Fujitsu Limited
    Inventors: Yoshitaka Takahashi, Hitoshi Ikeda, Shinya Fujioka
  • Patent number: 6647786
    Abstract: A tuning-fork type vibration gyro enables to suppress pyroelectric noise caused by temperature change and to obtain sensor output having high signal-to-noise ratio. The tuning-fork type vibration gyro includes a tuning-fork type vibration body having two arms mutually disposed in parallel and a base for commonly supporting one end of the each arm, wherein a longitudinal direction of the two arms is defined as a z-axis and a perpendicular direction thereto is defined as an x-axis; driving electrodes respectively formed on the two arms for generating vibration of the two arms in a direction parallel to the x-axis; detecting electrodes respectively formed on the two arms for detecting electromotive force generated when the tuning-fork type vibration body is rotated around the z-axis; and dummy electrodes formed on the two arms in respective areas different from the driving electrodes and the detecting electrodes.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: November 18, 2003
    Assignee: Fujitsu Media Devices Limited
    Inventors: Kazuhiro Ohta, Masanori Yachi, Yoshitaka Takahashi, Kazutsugu Kikuchi, Keiji Saito
  • Publication number: 20030072187
    Abstract: A semiconductor storage device conducts a late-write operation. The semiconductor storage device comprises: a memory core circuit storing data; a data latch circuit storing preceding data corresponding to a preceding write-operation; an address compare circuit comparing a preceding address corresponding to the preceding write-operation and a present address corresponding to a present read-operation so as to determine whether the preceding address and the present address match each other; and a control circuit. The control circuit controls a test read-operation to read data from the memory core circuit regardless of whether the preceding address and the present address match each other.
    Type: Application
    Filed: November 5, 2002
    Publication date: April 17, 2003
    Applicant: Fujitsu Limited
    Inventors: Yoshitaka Takahashi, Hitoshi Ikeda, Shinya Fujioka
  • Publication number: 20030048736
    Abstract: A polarizing beam splitter for separating an upstream beam from a downstream beam according to the polarization of an incident beam is provided between first and second light sources emitting laser beams at respective wavelength and an objective lens. A phase plate for providing a phase difference to a beam incident on the polarizing beam splitter is provided between the polarizing beam splitter and the light sources. A portion of the laser beam incident on the polarizing beam splitter is reflected by the polarizing beam splitter and caused to be incident on a photo-detecting unit, so as to prevent an unnecessary portion of the laser beam is incident on the photo-detecting unit. According to the invention, the laser beam is used efficiently and the cost of fabricating an optical disk apparatus is reduced by eliminating a need for a gain controlling circuit in the photo-detecting unit.
    Type: Application
    Filed: October 31, 2002
    Publication date: March 13, 2003
    Inventors: Yoshitaka Takahashi, Hiroshi Akiyama
  • Patent number: 6498755
    Abstract: A semiconductor storage device conducts a late-write operation. The semiconductor storage device comprises: a memory core circuit storing data; a data latch circuit storing preceding data corresponding to a preceding write-operation; an address compare circuit comparing a preceding address corresponding to the preceding write-operation and a present address corresponding to a present read-operation so as to determine whether the preceding address and the present address match each other; and a control circuit. The control circuit controls a test read-operation to read data from the memory core circuit regardless of whether the preceding address and the present address match each other.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: December 24, 2002
    Assignee: Fujitsu Limited
    Inventors: Yoshitaka Takahashi, Hitoshi Ikeda, Shinya Fujioka
  • Patent number: 6496433
    Abstract: A semiconductor device has a normal mode and a test mode for testing the semiconductor device, and is provided with a first circuit which receives an input signal, a test signal and an output enable signal, and outputs the input signal in response to the output enable signal, a second circuit which is coupled to the first circuit and outputs the input signal obtained from the first circuit, and power supply pads which receive a power supply voltage which is supplied in common to the first circuit and the second circuit. The first circuit fixes an output impedance of the second circuit to a high-impedance regardless of the output enable signal when the test signal indicates the test mode.
    Type: Grant
    Filed: January 9, 2001
    Date of Patent: December 17, 2002
    Assignee: Fujitsu Limited
    Inventors: Yasuhiro Okumura, Yoshitaka Takahashi, Akihiro Funyu
  • Patent number: 6480455
    Abstract: An optical pickup device shares an objective lens for two different light sources so as to handle two kinds of optical recording media, that is, a first optical recording medium and a second optical recording medium, the second optical recording medium having a thickness larger than a thickness of the first optical recording medium. A first light source emits a first beam having a first wavelength. A second light source emits a second beam having a second wavelength. An objective lens converges the first beam and projects the converged first beam onto the first optical recording medium. The objective lens also converges the second beam and projects the converged second beam onto the second optical recording medium. A second coupling lens changes the second beam to a beam which matches the objective lens.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: November 12, 2002
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshitaka Takahashi