Patents by Inventor Hiroaki Takagi

Hiroaki Takagi 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: 20140364277
    Abstract: A transmission device includes a rotatable shaft, a first transmission member, and a second transmission member. The first transmission member includes a first fitting portion fitted coaxially to an outer circumferential surface of the rotatable shaft, and is attached to the rotatable shaft to transmit torque. The second transmission member is rotatably driven by a driving device and includes a second fitting portion fitted coaxially to the outer circumferential surface of the rotatable shaft. The second transmission member is connected coaxially to the first transmission member while the first and the second fitting portions are fitted to the outer circumferential surface of the rotatable shaft.
    Type: Application
    Filed: June 3, 2014
    Publication date: December 11, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventor: Hiroaki TAKAGI
  • Patent number: 8897672
    Abstract: An image forming apparatus includes a belt stretched and wound around a driving roller and multiple driven rollers; multiple image formation units arranged in a running direction of the belt including photoconductors to form toner images of different colors; multiple transfer rollers opposed to the photoconductors via the belt; an engagement/disengagement device to bring at least one of the multiple transfer rollers in contact with and separate from the belt in accordance with an image formation mode; a steering controller to correct displacement of the belt in a widthwise direction by inclining one of the multiple driven rollers in a prescribed direction as a steering roller not to change a perimeter of the belt at least in a first image formation mode in which all of the multiple transfer rollers contact the belt; at least one position adjustment roller; and a belt position adjuster.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: November 25, 2014
    Assignee: Ricoh Company, Ltd.
    Inventor: Hiroaki Takagi
  • Publication number: 20140329228
    Abstract: An object of the present invention is to provide an immunoassay that enables the rapid and convenient quantitative measurement with high detection sensitivity of a target substance in a liquid phase without the need of immobilization and washing steps and enables the visualization of an antigen.
    Type: Application
    Filed: November 1, 2012
    Publication date: November 6, 2014
    Applicant: Ushio Denki Kabushiki Kaisha
    Inventors: Hiroshi Ueda, Ryoji Abe, Hiroaki Takagi
  • Publication number: 20140294128
    Abstract: A receiver includes a transformation part configured to convert a time domain received signal to a frequency domain signal, a known signal extraction part configured to extract a known signal from the frequency domain signal, an estimation part configured to estimate a channel characteristic based upon the extracted known signal, a time direction extraction part configured to extract channel characteristic values of a particular carrier in a time direction from the estimated channel characteristic, a power spectrum acquiring part configured to acquire a power spectrum from the channel characteristic values extracted in the time direction, an error calculation part configured to calculate a carrier frequency error from the power spectrum, and a carrier correction part configured to correct for a carrier frequency of the received signal based upon the carrier frequency error.
    Type: Application
    Filed: February 18, 2014
    Publication date: October 2, 2014
    Applicants: FUJITSU SEMICONDUCTOR LIMITED, FUJITSU LIMITED
    Inventors: Masataka UMEDA, Naoto ADACHI, Hiroaki TAKAGI
  • Publication number: 20140270022
    Abstract: A data signal correction circuit includes a channel characteristic calculator unit configured to calculate a channel characteristic estimate value of a received data signal on the basis of a pilot signal, a path detector unit configured to determine a delay quantity of multipath propagation of the received data signal on the basis of the calculated channel characteristic estimate value, and an adaptive filter configured to receive the delay quantity and the channel characteristic estimate value as input items, adjust an input interval of the channel characteristic estimate value along a carrier frequency axis in accordance with the delay quantity, and perform adaptive equalization on the channel characteristic estimate value inputted to the adaptive filter at the adjusted input interval.
    Type: Application
    Filed: February 12, 2014
    Publication date: September 18, 2014
    Applicants: FUJITSU LIMITED, FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Hiroaki TAKAGI, Masataka UMEDA, Naoto ADACHI
  • Patent number: 8744016
    Abstract: A receiving apparatus includes a symbol timing detection unit, a Fourier transform unit, a first symbol timing correction unit, and an interpolation synthesis unit. The symbol timing detection unit is configured to detect a Fourier transform start position from a received transmitting signal of a symbol unit, the Fourier transform unit is configured to perform a Fourier transform using the detected Fourier transform start position. The first symbol timing correction unit is configured to calculate and correct an amount of change between the Fourier transform start position of a reference symbol and the detected Fourier transform start position, and the interpolation synthesis unit is configured to perform an interpolation synthesis of a plurality of delay profiles corresponding to a plurality of symbols including the reference symbol and a symbol in which the amount of change is corrected.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: June 3, 2014
    Assignees: Fujitsu Limited, Fujitsu Semiconductor Limited
    Inventors: Hiroaki Takagi, Naoto Adachi, Masataka Umeda
  • Patent number: 8639174
    Abstract: A disclosed to-be-transferred object length measurement device includes a first rotating body; a passage detection unit detecting a passage of the to-be-transferred object; a rotation amount measurement unit measuring a rotation amount of the first rotating body in a first measurement period; a second rotating body feeding the to-be-transferred object; a speed detection unit detecting a first feeding speed and a second feeding speed of the to-be-transferred object; and a calculation unit calculating a feeding distance of the to-be-transferred object per a predetermined rotation amount of the first rotating body based on the first feeding speed, and further calculating a length of the to-be-transferred object based on the rotation amount of the first rotating body in the first measurement period, the feeding distance, and the second feeding speed of the to-be-transferred object in the second measurement period.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: January 28, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Ashikawa, Tatsuya Watahiki, Minoru Takahashi, Hideyuki Takayama, Takahisa Koike, Masaru Yamagishi, Takuhei Minami, Takuro Kamiyai, Junya Takigawa, Hiroaki Takagi, Koichi Kudo, Katsuya Kawagoe
  • Patent number: 8406665
    Abstract: A steering controller uses a photointerrupter that detects the position of a filler when a steering roller is in a predetermined reference inclined position. The steering controller drives a steering motor to bring the steering roller to the reference inclined position based on a detection result obtained by the photointerrupter every time predetermined adjustment timing arrives or every time the power is turned on. Using the rotation angle of the steering motor in this condition as a reference rotation angle, the steering controller controls the rotation of the steering motor.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: March 26, 2013
    Assignee: Ricoh Company, Limited
    Inventors: Yuichi Hirose, Hiroaki Takagi, Takuro Kamiya, Junya Takigawa
  • Publication number: 20130071150
    Abstract: An image forming apparatus has a belt stretched and wound around a driving roller and multiple driven rollers; multiple image formation units arranged in a running direction of the belt including photoconductors to form toner images of different colors; multiple transfer rollers opposed to the photoconductors via the belt; an engagement/disengagement device to bring at least one of the multiple transfer rollers in contact with and separate from the belt in accordance with an image formation mode; a steering controller to correct displacement of the belt in a widthwise direction by inclining one of the multiple driven rollers in a prescribed direction as a steering roller not to change a perimeter of the belt at least in the first image formation mode in which all of the multiple transfer rollers contact the belt; at least one position adjustment roller; and a belt position adjuster.
    Type: Application
    Filed: September 6, 2012
    Publication date: March 21, 2013
    Applicant: RICOH COMPANY, LTD.
    Inventor: Hiroaki TAKAGI
  • Patent number: 8351830
    Abstract: A belt conveying device includes an endless belt stretched by a plurality of rollers; a drive unit that is connected to one of the plurality of rollers and drives the roller; a plurality of belt velocity detectors that are arranged at a plurality of locations along a belt width direction perpendicular to a moving direction of the endless belt and detect conveyance velocities of the endless belt; and a belt-inclination calculating unit that calculates an inclination of the endless belt in the moving direction from a difference between conveyance velocities of the endless belt detected by the plurality of belt velocity detectors.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: January 8, 2013
    Assignee: Ricoh Company, Limited
    Inventors: Koichi Kudo, Hideaki Kibune, Takuro Kamiya, Junya Takigawa, Hiroaki Takagi, Yuichi Hirose, Kazuya Nagao, Toshihiro Okamoto
  • Publication number: 20120307944
    Abstract: A receiving apparatus includes a symbol timing detection unit, a Fourier transform unit, a first symbol timing correction unit, and an interpolation synthesis unit. The symbol timing detection unit is configured to detect a Fourier transform start position from a received transmitting signal of a symbol unit, the Fourier transform unit is configured to perform a Fourier transform using the detected Fourier transform start position. The first symbol timing correction unit is configured to calculate and correct an amount of change between the Fourier transform start position of a reference symbol and the detected Fourier transform start position, and the interpolation synthesis unit is configured to perform an interpolation synthesis of a plurality of delay profiles corresponding to a plurality of symbols including the reference symbol and a symbol in which the amount of change is corrected.
    Type: Application
    Filed: April 9, 2012
    Publication date: December 6, 2012
    Applicants: FUJITSU SEMICONDUCTOR LIMITED, FUJITSU LIMITED
    Inventors: Hiroaki TAKAGI, Naoto ADACHI, Masataka Umeda
  • Publication number: 20120270338
    Abstract: An object is to provide an immunoassay method requiring neither a solid-phase immobilization step nor a washing step, enabling quick and simple quantitative measurement of a target substance in a liquid phase and capable of visualizing an antigen.
    Type: Application
    Filed: November 19, 2010
    Publication date: October 25, 2012
    Applicant: PROTEINEXPRESS CO., LTD.
    Inventors: Hiroshi Ueda, Ryoji Abe, Masaki Ihara, Hiroaki Takagi
  • Publication number: 20120190489
    Abstract: A drive transmission mechanism including a shaft including a reduced diameter portion at an outboard end, an engaging portion inboard of the reduced diameter portion, and an installation portion inboard of the engaging portion and having the same diameter as the engaging portion, a first bearing having an inner ring onto which the reduced diameter portion is fitted, a connecting member provided to the shaft and including a main body into which the installation portion is fitted and a fitting portion provided to the main body on a side in which the engaging portion is provided to accommodate the engaging portion, and a second bearing engaging the shaft to support the shaft at an inboard end of the shaft opposite the first bearing with the connecting member interposed between the first and second bearings.
    Type: Application
    Filed: December 27, 2011
    Publication date: July 26, 2012
    Applicant: RICOH COMPANY, LTD.
    Inventor: Hiroaki Takagi
  • Publication number: 20110277537
    Abstract: A to-be-called side device includes an alcohol drinking state check means for performing an alcohol drinking state check of a user, a peripheral state obtaining means for obtaining peripheral states by sound and image to keep an illegal communication as to the check performed between a person who monitors the check and the user as evidence, a temporary record continuation means for continuing the temporary record of the peripheral states obtained by the peripheral state obtaining means, and a pre-check/post-check record means for recording the peripheral state for 10 minutes before the check and the peripheral state for 10 minutes after the check in the respective checks, wherein the pre-check/post-check record means obtains the record of the peripheral state at least before the check from the record by the temporarily record continuation means in the record of the peripheral states for 20 minutes before and after the check.
    Type: Application
    Filed: May 9, 2011
    Publication date: November 17, 2011
    Applicant: TOKAI DENSHI, INC.
    Inventors: Hanzo Tsuzuki, Tetsuya Sugimoto, Hiroaki Takagi
  • Publication number: 20110110691
    Abstract: A steering controller uses a photointerrupter that detects the position of a filler when a steering roller is in a predetermined reference inclined position. The steering controller drives a steering motor to bring the steering roller to the reference inclined position based on a detection result obtained by the photointerrupter every time predetermined adjustment timing arrives or every time the power is turned on. Using the rotation angle of the steering motor in this condition as a reference rotation angle, the steering controller controls the rotation of the steering motor.
    Type: Application
    Filed: October 20, 2010
    Publication date: May 12, 2011
    Inventors: Yuichi Hirose, Hiroaki Takagi, Takuro Kamiya, Junya Takigawa
  • Publication number: 20100239282
    Abstract: A disclosed to-be-transferred object length measurement device includes a first rotating body; a passage detection unit detecting a passage of the to-be-transferred object; a rotation amount measurement unit measuring a rotation amount of the first rotating body in a first measurement period; a second rotating body feeding the to-be-transferred object; a speed detection unit detecting a first feeding speed and a second feeding speed of the to-be-transferred object; and a calculation unit calculating a feeding distance of the to-be-transferred object per a predetermined rotation amount of the first rotating body based on the first feeding speed, and further calculating a length of the to-be-transferred object based on the rotation amount of the first rotating body in the first measurement period, the feeding distance, and the second feeding speed of the to-be-transferred object in the second measurement period.
    Type: Application
    Filed: March 18, 2010
    Publication date: September 23, 2010
    Inventors: Masahiro Ashikawa, Tatsuya Watahiki, Minoru Takahashi, Hideyuki Takayama, Takahisa Koike, Masaru Yamagishi, Takuhei Minami, Takuro Kamiyai, Junya Takigawa, Hiroaki Takagi, Koichi Kudo, Katsuya Kawagoe
  • Publication number: 20100232819
    Abstract: A belt conveying device includes an endless belt stretched by a plurality of rollers; a drive unit that is connected to one of the plurality of rollers and drives the roller; a plurality of belt velocity detectors that are arranged at a plurality of locations along a belt width direction perpendicular to a moving direction of the endless belt and detect conveyance velocities of the endless belt; and a belt-inclination calculating unit that calculates an inclination of the endless belt in the moving direction from a difference between conveyance velocities of the endless belt detected by the plurality of belt velocity detectors.
    Type: Application
    Filed: March 12, 2010
    Publication date: September 16, 2010
    Inventors: Koichi Kudo, Hideaki Kibune, Takuro Kamiya, Junya Takigawa, Hiroaki Takagi, Yuichi Hirose, Kazuya Nagao, Toshihiro Okamoto
  • Patent number: 7557667
    Abstract: An angular rate sensor includes a tuning-fork oscillator, a support portion, an oscillation absorption portion and a mounting portion. The tuning-fork oscillator has a base and arm portions extending from the base. The support portion supports the base of the tuning-fork oscillator at a front face thereof. The oscillation absorption portion is provided on a back face of the support portion opposite to the front face. The mounting portion mounts the support portion through the oscillation absorption portion.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: July 7, 2009
    Assignee: Tamagawa Seiki Co., Ltd.
    Inventors: Toshinobu Hosokawa, Kazuhiro Ota, Hiroshi Tanaka, Masanori Yachi, Hiroaki Takagi
  • Publication number: 20080007360
    Abstract: An angular rate sensor includes a tuning-fork oscillator, a support portion, an oscillation absorption portion and a mounting portion. The tuning-fork oscillator has a base and arm portions extending from the base. The support portion supports the base of the tuning-fork oscillator at a front face thereof. The oscillation absorption portion is provided on a back face of the support portion opposite to the front face. The mounting portion mounts the support portion through the oscillation absorption portion.
    Type: Application
    Filed: June 22, 2007
    Publication date: January 10, 2008
    Inventors: Toshinobu Hosokawa, Kazuhiro Ota, Hiroshi Tanaka, Masanori Yachi, Hiroaki Takagi
  • Publication number: 20070256497
    Abstract: An angular velocity sensor includes multiple tuning-fork vibrators, each of which respectively includes a base portion and multiple arm portions extending from the base portion, and a difference in a resonance frequency between the multiple tuning-fork vibrators is at least 2 percent of an average of resonance frequencies of the multiple tuning-fork vibrators.
    Type: Application
    Filed: April 18, 2007
    Publication date: November 8, 2007
    Inventors: Hiroshi Ishikawa, Takayuki Yamaji, Akira Imai, Shoji Ogasawara, Takashi Katsuki, Yuji Takahashi, Fumihiko Nakazawa, Hiroaki Takagi