Patents by Inventor Yohei Ikeda

Yohei Ikeda 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: 12122006
    Abstract: A machine tool includes a rotation indexing device. The rotation indexing device includes a frame accommodates a rotary shaft, a drive motor rotationally drives the rotary shaft, a drive transmission mechanism accommodated in a space inside the frame, and a detection device. The drive transmission mechanism includes a gear mechanism, and the space includes one or more storage parts for storing lubricating oil. The detection device detects a height position of an oil level of the lubricating oil, and is provided on a one-to-one basis with respect to a detection target storage part, which is set as a detection target, of the one or more storage parts.
    Type: Grant
    Filed: May 23, 2022
    Date of Patent: October 22, 2024
    Assignees: KOMATSU NTC LTD., TSUDAKOMA KOGYO KABUSHIKI KAISHA
    Inventors: Yoshiki Harada, Yohei Ikeda
  • Patent number: 12031625
    Abstract: A mechanical device includes a worm gear mechanism which includes a worm wheel and a worm shaft. The worm gear mechanism adjusts backlash between the worm and the worm wheel by movement of the worm shaft in an axis line direction. The mechanical device includes a position adjusting mechanism which includes a holder, an axial force generation part and a base part. The holder is screwed into the accommodation hole and rotatably supports the worm shaft. The holder causes the movement of the worm shaft by rotation. The axial force generation part includes a screw part and exerts an axial force on the holder. The base part is provided to the frame and receives a reactive force acting on the axial force generation part as a result of exerting the axial force to the holder.
    Type: Grant
    Filed: July 25, 2022
    Date of Patent: July 9, 2024
    Assignee: TSUDAKOMA KOGYO KABUSHIKI KAISHA
    Inventor: Yohei Ikeda
  • Publication number: 20230057031
    Abstract: A mechanical device includes a worm gear mechanism which includes a worm wheel and a worm shaft. The worm gear mechanism adjusts backlash between the worm and the worm wheel by movement of the worm shaft in an axis line direction. The mechanical device includes a position adjusting mechanism which includes a holder, an axial force generation part and a base part. The holder is screwed into the accommodation hole and rotatably supports the worm shaft. The holder causes the movement of the worm shaft by rotation. The axial force generation part includes a screw part and exerts an axial force on the holder. The base part is provided to the frame and receives a reactive force acting on the axial force generation part as a result of exerting the axial force to the holder.
    Type: Application
    Filed: July 25, 2022
    Publication date: February 23, 2023
    Applicant: TSUDAKOMA KOGYO KABUSHIKI KAISHA
    Inventor: Yohei IKEDA
  • Publication number: 20220388104
    Abstract: A machine tool includes a rotation indexing device. The rotation indexing device includes a frame accommodates a rotary shaft, a drive motor rotationally drives the rotary shaft, a drive transmission mechanism accommodated in a space inside the frame, and a detection device. The drive transmission mechanism includes a gear mechanism, and the space includes one or more storage parts for storing lubricating oil. The detection device detects a height position of an oil level of the lubricating oil, and is provided on a one-to-one basis with respect to a detection target storage part, which is set as a detection target, of the one or more storage parts.
    Type: Application
    Filed: May 23, 2022
    Publication date: December 8, 2022
    Applicants: KOMATSU NTC LTD., TSUDAKOMA KOGYO KABUSHIKI KAISHA
    Inventors: Yoshiki HARADA, Yohei IKEDA
  • Patent number: 10088795
    Abstract: There is provided a cleaning blade including an elastic member and a supporting member, in which a free end of the elastic member has an edge and a hardened surface constituting the edge. The cleaning blade satisfies a relationship of 0.10?DHs?0.40 and DHs?DHm where DHs (mN/?m2) represents a dynamic hardness of the hardened surface and DHm (mN/?m2) represents a maximum value of a dynamic hardness obtained in a positional range in which a distance L from the edge on a straight line that bisect an angle of the edge satisfies 0 ?m<L?200 ?m and in AFM-IR spectrum of the hardened surface, peak intensity ? C?O free (1724 to 1736 cm?1) derived from a urethane group and peak intensity ? C?O bond (1708 to 1720 cm?1) derived from a urethane group hydrogen bond has a specific relationship.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: October 2, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yohei Ikeda, Arihiro Yamamoto, Tomoya Kawakami
  • Publication number: 20180120753
    Abstract: There is provided a cleaning blade including an elastic member and a supporting member, in which a free end of the elastic member has an edge and a hardened surface constituting the edge. The cleaning blade satisfies a relationship of 0.10?DHs?0.40 and DHs?DHm where DHs (mN/?m2) represents a dynamic hardness of the hardened surface and DHm (mN/?m2) represents a maximum value of a dynamic hardness obtained in a positional range in which a distance L from the edge on a straight line that bisect an angle of the edge satisfies 0 ?m<L?200 ?m and in AFM-IR spectrum of the hardened surface, peak intensity ? C?O free (1724 to 1736 cm?1) derived from a urethane group and peak intensity ? C?O bond (1708 to 1720 cm?1) derived from a urethane group hydrogen bond has a specific relationship.
    Type: Application
    Filed: October 11, 2017
    Publication date: May 3, 2018
    Inventors: Yohei Ikeda, Arihiro Yamamoto, Tomoya Kawakami
  • Publication number: 20180056467
    Abstract: Provided is a clamp device of an indexing apparatus that indexes a main shaft, which is rotatably supported in an accommodation hole of a frame via a bearing, to a set angular position by rotating the main shaft by using a driving device. The clamp device includes a working channel that connects an air supply device, which supplies compressed air, to a pressure chamber in the clamp device. The clamp device operates to retain an angular position of the main shaft when compressed air is supplied from the air supply device. The clamp device includes a pressure transmitting portion that is interposed in the working channel and in which a piston is slidably disposed. A portion of the working channel on the pressure chamber side of the piston in the pressure transmitting portion is filled with an incompressible fluid.
    Type: Application
    Filed: August 8, 2017
    Publication date: March 1, 2018
    Inventors: Junichiro Ishizaki, Yohei Ikeda
  • Patent number: 7650279
    Abstract: To shorten an output delay while a high sound source separation performance is ensured when a sound separation process based on an ICA method is performed. A second Fourier transform process execution cycle t2 for obtaining a second frequency-domain signal S1 used as an input signal of a filter process is set shorter than a first Fourier transform process execution cycle t1 for obtaining a first frequency-domain signal used for a learning computation of a separating matrix. When the time length of a second time-domain signal S1 is set shorter than a time length of a first time-domain signal S0, a second separating matrix used for a filter process is set by aggregating matrix components of a first separating matrix obtained through a learning calculation for every a plurality of groups.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: January 19, 2010
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Takashi Hiekata, Yohei Ikeda
  • Publication number: 20090012779
    Abstract: A sound source separation apparatus includes: an SIMO-ICA process unit, separating and generating an SIMO signal by the BSS method based on the ICA method; a sound source direction estimation unit, estimating a sound source direction based on a separating matrix, computed by a learning calculation of the BSS method based on the ICA method; a beamformer process unit, performing, on each SIMO signal, a beamformer process of enhancing, according to each frequency bin, a sound component from each sound source direction; an intermediate process unit, performing an intermediate process that includes performing a selection process, etc.
    Type: Application
    Filed: March 4, 2008
    Publication date: January 8, 2009
    Inventors: Yohei Ikeda, Takashi Hiekata, Takashi Morita, Hiroshi Saruwatari, Yoshimitsu Mori
  • Publication number: 20080267423
    Abstract: An object sound extraction apparatus includes sound source separation sections for separating and generating an object sound separation signal corresponding to an object sound and reference sound separation signals corresponding to the other reference sound based on each combination of a main acoustic signal and sub acoustic signals, an object sound separation signal synthesis section for synthesizing the object sound separation signals, and a spectrum subtraction processing section for extracting an acoustic signal corresponding to the object sound from the synthesis signal by performing a spectrum subtraction processing between the synthesis signal and the reference sound separation signals. Accordingly, in acoustic environments where the object sound and the noises are mixed in the acoustic signals obtained via the microphones, and the mixed conditions can vary, a high object sound extraction performance can be ensured by a small object sound extraction apparatus.
    Type: Application
    Filed: April 7, 2008
    Publication date: October 30, 2008
    Inventors: Takashi Hiekata, Takashi Morita, Yohei Ikeda, Toshiaki Shimoda
  • Publication number: 20080027714
    Abstract: To shorten an output delay while a high sound source separation performance is ensured when a sound separation process based on an ICA method is performed. A second Fourier transform process execution cycle t2 for obtaining a second frequency-domain signal S1 used as an input signal of a filter process is set shorter than a first Fourier transform process execution cycle t1 for obtaining a first frequency-domain signal used for a learning computation of a separating matrix. When the time length of a second time-domain signal S1 is set shorter than a time length of a first time-domain signal S0, a second separating matrix used for a filter process is set by aggregating matrix components of a first separating matrix obtained through a learning calculation for every a plurality of groups.
    Type: Application
    Filed: June 26, 2007
    Publication date: January 31, 2008
    Inventors: Takashi Hiekata, Yohei Ikeda
  • Publication number: 20070133811
    Abstract: A sound source separation apparatus performs a temporary learning processing and a temporary separation processing with respect to each of a plurality of candidate matrixes (separating matrixes obtained by learning calculation based on input signals of different sound source conditions) stored on a candidate matrix memory in advance. The apparatus determines an initial matrix of the separating matrix based on the obtained correlation evaluation of the separated signals. The learning calculations of the initial matrix determination processing and separating matrix based on the initial matrix are performed at a time of the sound source separation processing by the apparatus and when a degree of correlation among the separated signals by a correlation evaluation part exceeds a predetermined level.
    Type: Application
    Filed: November 22, 2006
    Publication date: June 14, 2007
    Inventors: Hiroshi Hashimoto, Takashi Hiekata, Takashi Morita, Yohei Ikeda