Patents by Inventor Osamu Yoshida

Osamu Yoshida 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: 7513842
    Abstract: In a hydraulic tensioner, a check valve unit is recessed in a check valve unit-accommodating hole formed at the rear end of a plunger-accommodating hole. A plunger-biasing spring extends into the check valve unit-accommodating hole, and is seated on a flat front surface of the check valve unit. The rear portion of the plunger-biasing spring is prevented from lateral movement by the side wall of the check valve unit-accommodating hole.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: April 7, 2009
    Assignee: Tsubakimoto Chain Co.
    Inventor: Osamu Yoshida
  • Patent number: 7481305
    Abstract: A lock-up mechanism for a torque converter comprising a lock-up clutch secured thereto with a friction liner having a friction surface, and a front cover having an engaging surface adapted to be engaged with the friction surface, is wherein either the friction surface or the engaging surface is formed therein with a substantially annular circumferential groove.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: January 27, 2009
    Assignees: NSK-Warner K.K., Aisin AW Co., Ltd., Aisin AW Industries Co., Ltd.
    Inventors: Hiroyuki Sakai, Makoto Ogawa, Takamitsu Kuroyanagi, Osamu Yoshida, Eiji Hayashi, Hideki Ogawa, Tamotsu Fujii, Kenji Maruo, Hideaki Takabayashi
  • Patent number: 7477466
    Abstract: A control device that controls a storage device having an auto-gain-control function for controlling strength of an output signal from a head that reads data from a storage medium, which includes a determining unit that determines whether the strength of the output signal controlled by the auto-gain-control function is within a predetermined range, an abnormal-float detecting unit that detects an abnormal float of the head based on a result from the determining unit, an abnormal-float-number counting unit that counts a number of times of the detected abnormal floats of the head, and an abnormal-float-count storing unit that stores the counted number of times of the abnormal floats into a storage area of the storage device.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: January 13, 2009
    Assignee: Fujitsu Limited
    Inventors: Osamu Yoshida, Shunsuke Aoki, Shigenori Yanagi
  • Patent number: 7458909
    Abstract: A tensioner, in which an inner body and an outer body, which can deal with tensioner mounting forms and tension imparting functions required from various engines can be assembled and its efficient production and reliable assembling without wobbling and clattering can be performed. A body 22 of a tensioner 21 is composed of plastic outer and inner bodies 23 and 24 formed by different members respectively. The outer body 23 is provided with a tensioner mounting means and an inner body fitting hole 23a, the inner body is provided with a plunger accommodating hole 24a, a plunger 26 biased by a compression spring 27 is slidably fitted into the plunger accommodating hole 24a, a bottom portion of the plunger accommodating hole 24a is provided with a check valve 31, and at least the inner body 24, the check valve 31, the compression spring 27 and the plunger 26 form an inner body side unit 33, which imparts proper tension.
    Type: Grant
    Filed: October 6, 2003
    Date of Patent: December 2, 2008
    Assignee: Tsubakimoto Chain Co.
    Inventors: Hiroshi Hashimoto, Osamu Yoshida, Masaki Kato
  • Publication number: 20080261737
    Abstract: A check valve unit in a hydraulic tensioner comprises a check ball, a steel ball guide having an inner wall allowing a limited range of longitudinal movement of the ball but restricting its lateral movement, a steel retainer attached to the high pressure oil chamber side of the ball guide, and a steel ball seat attached to the oil supply side of the ball guide. Bulged portions formed on an outer surface of the ball guide are press-fit into the plunger-accommodating hole of the tensioner.
    Type: Application
    Filed: November 30, 2007
    Publication date: October 23, 2008
    Applicant: Tsubakimoto Chain Co.
    Inventors: Osamu Yoshida, Hiroshi Hashimoto, Tsutomu Namie, Hiroyuki Miyake
  • Patent number: 7427250
    Abstract: In a hydraulic tensioner a cylindrical plunger slidably protrudes from a plunger-accommodating hole in a tensioner housing. A check valve unit allows oil to flow under pressure into a high pressure chamber formed by the plunger and the housing, but blocks reverse flow. The plunger is biased in the protruding direction by a spring located in the high pressure chamber. The plunger has an annular groove in its outer circumferential surface, and a C-shaped ring disposed in the groove is resiliently biased radially outwardly against the inner circumferential wall of the plunger-accommodating hole. A radial clearances is provided between the ring and the bottom of the groove, and the ring also fits into the groove with an axial clearance.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: September 23, 2008
    Assignee: Tsubakimoto Chain Co.
    Inventor: Osamu Yoshida
  • Patent number: 7427249
    Abstract: In the check valve unit of a hydraulic tensioner a check ball guide has an inner wall surrounding a check ball. This wall is provided with a plurality of oil communicating grooves, formed by cutting away parts of the inner wall of the guide. These grooves carry oil past the ball from the oil supply toward a high pressure oil chamber of the tensioner, when the ball moves away from its seat.
    Type: Grant
    Filed: January 6, 2005
    Date of Patent: September 23, 2008
    Assignee: Tsubakimoto Chain Co.
    Inventor: Osamu Yoshida
  • Publication number: 20080207366
    Abstract: To reduce seizing in a tensioner having a plunger slidable in a plunger-accommodating hole of a tensioner housing and biased in the projecting direction, the tensioner housing is formed of a hyper-eutectic Al—Si series alloy containing Si in the range from 14 to 16 weight % and having a particle diameter of proeutectic Si in the range from 20 to 30 ?m.
    Type: Application
    Filed: April 16, 2008
    Publication date: August 28, 2008
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Osamu Yoshida, Hiroshi Hashimoto, Kenichi Nagao
  • Patent number: 7404776
    Abstract: A check valve unit in a hydraulic tensioner comprises a check ball which controls the flow of the oil to and from a high pressure oil chamber formed by a plunger and the plunger-receiving hole of the tensioner housing, a ball guide in which the check ball moves, a retainer which seals the check ball in the ball guide, and a ball seat which blocks reverse flow of oil by seating the check ball. Grooves, which ventilate air from the high pressure oil chamber to an oil supply passage, are formed on an outer circumferential surface of the ball guide and a bottom surface of the ball seat.
    Type: Grant
    Filed: January 10, 2005
    Date of Patent: July 29, 2008
    Assignee: Tsubakimoto Chain Co.
    Inventor: Osamu Yoshida
  • Publication number: 20080131571
    Abstract: The present invention provides a sol of spinous inorganic oxide particles not containing coarse particles, in which particles having extremely homogeneous particles are dispersed in a solvent. An acidic silicic acid is added to a dispersion liquid of core particles to grow core particles, and then again the acidic silicic acid is added at the addition rate 1.2 to 1.8 higher than that in the previous step to prepare a sol of spinous inorganic oxide particles. Then the sol is subjected to centrifugation to remove coarse particles having the diameter of 800 nm or more, thus spinous inorganic oxide particles having peculiar form such as a spinous one being obtained.
    Type: Application
    Filed: November 29, 2007
    Publication date: June 5, 2008
    Applicant: CATALYSTS& CHEMICALS INDUSTRIES CO., LTD
    Inventors: Kazuhiro Nakayama, Mami Tokunaga, Akira Nakashima, Kazuaki Inoue, Osamu Yoshida, Yoshinori Wakamiya, Hiroyasu Nishida
  • Publication number: 20080126848
    Abstract: There is provided a storage apparatus, a stored data processing apparatus, and a stored data processing program capable of enhancing error recovery capability while suppressing an increase in response time for the higher-level device.
    Type: Application
    Filed: January 9, 2007
    Publication date: May 29, 2008
    Inventor: Osamu Yoshida
  • Publication number: 20080097078
    Abstract: Novel glycopeptide antibiotic derivatives. These derivatives are represented by the formula (aglycon part of glycopeptide antibiotic derivative)-(Sac-NH)—RA [wherein (aglycon part of glycopeptide antibiotic derivative) is the part formed by removing the sugar part from a known glycopeptide antibiotic derivative; (Sac-NH) part is an amino sugar part or a sugar chain part containing an amino sugar; and RA represents, e.g., the formula —X1—Ar1—X2—Y—X3—Ar2 (wherein X1, X2, and X3 each represents 1) a single bond or 2) a heteroatom or heteroatom-containing group selected from the group consisting of —N?, ?N—, —NR1—, —O—, etc.; Y represents —NR2CO— or —CONR2— (wherein R2 represents hydrogen or lower alkyl), etc.)]. These derivatives have antibacterial activity against vancomycin-resistant bacteria.
    Type: Application
    Filed: November 24, 2005
    Publication date: April 24, 2008
    Inventors: Hirokazu Arimoto, Jun Lu, Yoshinori Yamano, Tatsuro Yasukata, Osamu Yoshida, Tsutomu Iwaki, Yutaka Yoshida, Issei Kato, Kenji Morimoto, Kayo Yasoshima
  • Publication number: 20080094746
    Abstract: A disk drive correctly recognizes newly written data when a plurality of readable data exist on the same sector of the same track, by comparing AGC values of each of the readable data, comparing error rates generated by Viterbi decoding, or both. An offset value determining means determines whether an offset value when the data is read has exceeded a predetermined value when the data is read. An offset control means controls the head, on the basis of the determination result of the offset value determining means, to conduct the offset operation on the opposite side of the track when the data is read the first time, and a selecting means selects the new data recorded in the sector by comparing the results obtained for both sets of data.
    Type: Application
    Filed: May 10, 2007
    Publication date: April 24, 2008
    Applicant: Fujitsu Limited
    Inventor: Osamu Yoshida
  • Publication number: 20080086951
    Abstract: The present invention provides a sol of spinous silica-based particles in which silica-based particles having peculiar forms, spinous forms are dispersed in a solvent. The spinous silica-based particles have verrucous projections formed on surfaces of spherical silica-based particles. In the spinous particles, a value of the surface roughness (SA1/SA2, SA1 indicating a specific surface area measured by the BET method or the Sears method and SA2 indicating a specific surface area converted from an average particle diameter (D2) measured by the image analysis method) is in the range from 1.7 to 10. Furthermore the average diameter (D2) measured by the image analysis method is in the range from 7 to 150 nm.
    Type: Application
    Filed: October 11, 2007
    Publication date: April 17, 2008
    Applicant: CATALYSTS & CHEMICALS INDUSTRIES CO., LTD
    Inventors: Yoshinori Wakamiya, Hiroyasu Nishida, Yuji Tawarazako, Kazuaki Inoue, Osamu Yoshida, Akira Nakashima
  • Publication number: 20080091971
    Abstract: There is provided a storage apparatus, a stored data processing apparatus, and a stored data processing program capable of enhancing error recovery capability while suppressing an increase in response time for the higher-level device. A storage apparatus performs at least write processing for a storage medium. On the storage medium, data is allocated in units of a first block having a predetermined data length, the first block is allocated in units of a second block constituted by a plurality of the first blocks, and a third block having the same data length as the first block is allocated in correspondence with the second block.
    Type: Application
    Filed: January 8, 2007
    Publication date: April 17, 2008
    Inventor: Osamu Yoshida
  • Publication number: 20080082806
    Abstract: A cache controller prefetches instruction code from a memory and stores the instruction code in a cache. The cache controller comprises an address output section for, when an instruction fetch address from a processor is matched with a comparative address, outputting a prefetch address corresponding to the comparative address, and a load control section for loading the instruction code in the cache from the outputted prefetch address of the memory.
    Type: Application
    Filed: February 27, 2007
    Publication date: April 3, 2008
    Inventor: Osamu Yoshida
  • Publication number: 20080077753
    Abstract: There is provided a storage apparatus, a stored data processing apparatus, and a stored data processing program capable of enhancing error recovery capability while suppressing an increase in response time for the higher-level device.
    Type: Application
    Filed: January 8, 2007
    Publication date: March 27, 2008
    Inventor: Osamu Yoshida
  • Publication number: 20080066525
    Abstract: [PROBLEM] To provide a novel inspection method and system of a container enabling inspection of excess entrainment of air inside a flexible container and inspection of seal defects of a flexible container to be performed by a single technique simultaneously, enabling a full run of flexible containers to be continuously inspected on the production line, and giving a high inspection precision. [MEANS FOR SOLUTION] Inspecting for seal defects of a container and excess entrainment of air in a container in an inspected object comprised of a flexible container in which a liquid is filled, during which placing the inspected object in an air-tight container, sucking out the air in the air-tight container to reduce the pressure sufficient to make container outer walls of the inspected object expand, measuring an expansion dimension of the container outer walls, and comparing it with a preset threshold value to judge the quality of the inspected object.
    Type: Application
    Filed: April 25, 2005
    Publication date: March 20, 2008
    Applicants: KABUSHIKI KAISHA N-TECH, KABUSHIKI KAISHA YAKULT HONSHA, TOHOSHOJI KABUSHIKI KAISHA
    Inventors: Hajime Kojima, Yoshitaro Horiba, Osamu Yoshida, Chizuka Kai, Tadayoshi Teramoto
  • Publication number: 20070291388
    Abstract: A control apparatus performs, when reading predetermined data stored in a storage medium, a correction of a signal read by a head during a Viterbi decoding process of the signal. A signal-quality-value calculating unit calculates a signal quality value of the signal based on a status of the correction during the Viterbi decoding process. A signal-quality-value storing unit stores the calculated signal quality value in a storage area.
    Type: Application
    Filed: October 26, 2006
    Publication date: December 20, 2007
    Inventors: Osamu Yoshida, Shunsuke Aoki, Shigenori Yanagi
  • Publication number: 20070291389
    Abstract: A control device that controls a storage device having an auto-gain-control function for controlling strength of an output signal from a head that reads data from a storage medium, which includes a determining unit that determines whether the strength of the output signal controlled by the auto-gain-control function is within a predetermined range, an abnormal-float detecting unit that detects an abnormal float of the head based on a result from the determining unit, an abnormal-float-number counting unit that counts a number of times of the detected abnormal floats of the head, and an abnormal-float-count storing unit that stores the counted number of times of the abnormal floats into a storage area of the storage device.
    Type: Application
    Filed: October 30, 2006
    Publication date: December 20, 2007
    Inventors: Osamu Yoshida, Shunsuke Aoki, Shigenori Yanagi