Patents by Inventor Masaharu Chiba

Masaharu Chiba 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: 10633504
    Abstract: The present invention provides expanded polylactic acid resin beads, in which each bead is composed of a core layer that is in an expanded state and contains a crystalline polylactic acid resin, and a coating layer that coats the core layer and contains a mixed resin of an amorphous polylactic acid resin and a crystalline polyolefin resin, wherein the content of the crystalline polyolefin resin in the coating layer is 3% by weight or more and less than 50% by weight. The expanded polylactic acid resin beads can stably produce a molded article of expanded polylactic acid resin beads excellent in fusibility of the expanded polylactic acid resin beads therein and also excellent in solvent resistance.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: April 28, 2020
    Assignee: JSP Corporation
    Inventors: Takuya Chiba, Masaharu Oikawa
  • Patent number: 8090036
    Abstract: A carrier leak compensating device (2) for adding compensation values to a received transmission signal, an analog quadrature modulator (4), a feedback device (5-7) for receiving and quadrature-detecting part of an output signal of the analog quadrature modulator and outputting a feedback signal in which the frequency of each carrier signal is the same as in the transmission signal, a carrier leak detecting device (800) for detecting an I-phase carrier leak and a Q-phase carrier leak on the basis of the difference between cumulative addition values of an amplitude/phase-adjusted feedback signal and the transmission signal, and a carrier leak compensation value controller (9) for updating the compensation values on the basis of the detected carrier leak. The number of samples for the amplitude/phase detection may be smaller than the number of cumulative addition samples.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: January 3, 2012
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Takashi Okada, Takahiro Todate, Yasuhiro Takeuchi, Takashi Okazaki, Masaharu Chiba
  • Publication number: 20090161778
    Abstract: It is intended to compensate for a carrier leak for any carrier arrangement. There are provided a carrier leak compensating means 2 for adding compensation values to a received transmission signal, an analog quadrature modulator 4, feedback means 5-7 for receiving and quadrature-detecting part of an output signal of the analog quadrature modulator and outputting a feedback signal in which the frequency of each carrier signal is the same as in the transmission signal, a carrier leak detecting means 800 for detecting an I-phase carrier leak and a Q-phase carrier leak on the basis of the difference between cumulative addition values of an amplitude/phase-adjusted feedback signal and the transmission signal, and a carrier leak compensation value control means 9 for updating the compensation values on the basis of the detected carrier leak. The number of samples for the amplitude/phase detection may be smaller than the number of cumulative addition samples.
    Type: Application
    Filed: February 26, 2007
    Publication date: June 25, 2009
    Inventors: Takashi Okada, Takahiro Todate, Yasuhiro Takeuchi, Takashi Okazaki, Masaharu Chiba
  • Patent number: 6157882
    Abstract: In an electronic control system for an automatic transmission, a vehicular input signal detecting system samples an analog signal from the sensor based on a pulse signal output to control a solenoid.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: December 5, 2000
    Assignee: Aisin AW Co., Ltd.
    Inventors: Hirotaka Hayakawa, Masao Saito, Masaharu Chiba, Kenji Suzuki
  • Patent number: 5954776
    Abstract: A hydraulic control unit of an automatic transmission calculates deceleration during a coasting downshift, and calculates a piston play offsetting time, that is, the lag time that elapses between a shift decision and the start of the shift, on the basis of a correction value determined in accordance with the lag time learned from the previous shift. Based on the rate of deceleration and the piston play offsetting time, the downshift line in the speed shift map is corrected, that is, advanced in timing. Using this timing-advanced shift line, the control unit makes an earlier shift decision such that the shift starts in a proper state of operation, thus reducing shift shock during a coasting downshift and preventing excessive engine speed during a high-speed upshift.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: September 21, 1999
    Assignee: Aisin AW Co., LTD.
    Inventors: Masao Saito, Masaharu Chiba, Masayuki Kuwata, Masatoshi Taguchi, Kenji Suzuki, Hiroshi Tsutsui
  • Patent number: 5951616
    Abstract: A current control system for a linear solenoid for feedback-controlling an output voltage value on the basis of a difference between a command current value to the linear solenoid, as set according to a vehicle running state, and a feedback current value, as produced by monitoring a current value to be really fed to the linear solenoid, including: a decision circuit that decides whether or not the resistance value of the linear solenoid can be calculated; a real resistance value calculating circuit that calculates a real resistance value on the basis of a signal coming from the decision circuit, the command current value and the output voltage value; a comparison circuit that compares the calculated real resistance value and a resistance value in a memory unit; and a correction circuit that corrects the resistance value in the memory unit on the basis of the comparison result from the comparison circuit. The output voltage value is outputted on the basis of the corrected resistance value.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: September 14, 1999
    Assignee: Aisin AW Co., Ltd.
    Inventors: Masaharu Chiba, Masao Saito, Kenji Suzuki