Patents by Inventor Eichi Koizumi

Eichi Koizumi 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: 20240199147
    Abstract: A crawler type traveling body includes a drive wheel, an in-wheel motor incorporated in the drive wheel, a plurality of rotating wheels disposed below the drive wheel, a crawler, and a tensioner. The crawler is wound around the drive wheel and the rotating wheels and configured to be rotated by the drive wheel. The tensioner is coupled to a drive shaft of the in-wheel motor and configured to press the drive wheel against the crawler and apply tension to the crawler.
    Type: Application
    Filed: January 23, 2024
    Publication date: June 20, 2024
    Applicant: Ricoh Company, Ltd.
    Inventors: Eichi KOIZUMI, Hiroshi SHIMURA, Ryota YAMASHINA, Taku KITAHARA, Hiroshi OKAMOTO
  • Patent number: 11964710
    Abstract: A crawler type traveling body includes a drive wheel, an in-wheel motor incorporated in the drive wheel, a plurality of rotating wheels disposed below the drive wheel, a crawler, and a tensioner. The crawler is wound around the drive wheel and the rotating wheels and configured to be rotated by the drive wheel. The tensioner is coupled to a drive shaft of the in-wheel motor and configured to press the drive wheel against the crawler and apply tension to the crawler.
    Type: Grant
    Filed: January 25, 2021
    Date of Patent: April 23, 2024
    Assignee: Ricoh Company, Ltd.
    Inventors: Eichi Koizumi, Hiroshi Shimura, Ryota Yamashina, Taku Kitahara, Hiroshi Okamoto
  • Publication number: 20230373577
    Abstract: A crawler-type traveling body includes: a crawler; a drive wheel including a drive shaft, the drive wheel configured to apply a driving force to the crawler; at least two track rollers disposed below the drive wheel, the crawler being stretched around the drive wheel and said at least two track rollers; and an auxiliary mechanism between said at least two track rollers, the auxiliary mechanism includes two auxiliary wheels swingably provided, wherein a push-up amount of one of the two auxiliary wheels pushed up in a vertical direction is larger than a push-down amount of another of the two auxiliary wheels pushed down in the vertical direction.
    Type: Application
    Filed: September 27, 2021
    Publication date: November 23, 2023
    Inventors: Hiroshi SHIMURA, Eichi KOIZUMI, Taku KITAHARA, Hiroshi OKAMOTO
  • Publication number: 20230088453
    Abstract: A crawler traveling body includes: a wheel around which a crawler belt is wound; a disc; a disc connector configured to connect the wheel and the disc, and rotate the wheel and the disc together; a brake caliper configured to sandwich the disc with a brake pad; and a motor configured to open or close the brake pad according to a control signal for controlling a degree of opening or closing of the brake pad.
    Type: Application
    Filed: September 19, 2022
    Publication date: March 23, 2023
    Inventors: Hiroshi SHIMURA, Taku KITAHARA, Hiroshi OKAMOTO, Eichi KOIZUMI
  • Publication number: 20210229760
    Abstract: A crawler type traveling body includes a drive wheel, an in-wheel motor incorporated in the drive wheel, a plurality of rotating wheels disposed below the drive wheel, a crawler, and a tensioner. The crawler is wound around the drive wheel and the rotating wheels and configured to be rotated by the drive wheel. The tensioner is coupled to a drive shaft of the in-wheel motor and configured to press the drive wheel against the crawler and apply tension to the crawler.
    Type: Application
    Filed: January 25, 2021
    Publication date: July 29, 2021
    Applicant: Ricoh Company, Ltd.
    Inventors: Eichi KOIZUMI, Hiroshi SHIMURA, Ryota YAMASHINA, Taku KITAHARA, Hiroshi OKAMOTO
  • Patent number: 10638039
    Abstract: An apparatus for controlling image capturing, includes circuitry to control image capturing operation of each one of a first image capturing device and a second image capturing device, so as to cause the first image capturing device and the second image capturing device to cooperate with each other to perform linked image capturing, the first image capturing device capable of capturing an image with an angle of view wider than that of the second image capturing device. The circuitry controls one of the first image capturing device and the second image capturing device to start image capturing in response to starting of image capturing by other one of the first image capturing device and the second image capturing device.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: April 28, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kazuhiro Yoshida, Takahiro Asai, Keiichi Kawaguchi, Hiroshi Suitoh, Eichi Koizumi, Tomohiro Ikeda, Yoshiyuki Toda
  • Publication number: 20190124274
    Abstract: An image processing apparatus for processing a plurality of images captured by an image capturing device, the image capturing device including a plurality of imaging elements each of which captures an imaging area with a preset angle of view, imaging areas of at least two of the plurality of imaging elements overlapping with each other, includes circuitry to: obtain the plurality of images captured by the image capturing device; convert at least one image of the plurality of images, to an image having an angle of view that is smaller than the preset angle of view; and combine the plurality of images including the at least one image that is converted, into a combined image.
    Type: Application
    Filed: October 22, 2018
    Publication date: April 25, 2019
    Inventors: Takuroh NAITOH, Takahiro ASAI, Keiichi KAWAGUCHI, Eichi KOIZUMI
  • Publication number: 20180184001
    Abstract: An apparatus for controlling image capturing, includes circuitry to control image capturing operation of each one of a first image capturing device and a second image capturing device, so as to cause the first image capturing device and the second image capturing device to cooperate with each other to perform linked image capturing, the first image capturing device capable of capturing an image with an angle of view wider than that of the second image capturing device. The circuitry controls one of the first image capturing device and the second image capturing device to start image capturing in response to starting of image capturing by other one of the first image capturing device and the second image capturing device.
    Type: Application
    Filed: December 28, 2017
    Publication date: June 28, 2018
    Inventors: Kazuhiro Yoshida, Takahiro Asai, Keiichi Kawaguchi, Hiroshi Suitoh, Eichi Koizumi, Tomohiro Ikeda, Yoshiyuki Toda
  • Patent number: 9588260
    Abstract: A microlens substrate includes a light receiving section that includes a light receiving surface configured to receive light, a supporting member that fixes the light receiving section, a microlens array that includes a plurality of microlenses configured to guide the light to the light receiving section, a lens holding member that holds the microlens array, and a fixing member that fixes the supporting member and the lens holding member. The fixing member includes a first fixing part that fixes the lens holding member and a second fixing member that fixes the supporting member. The lens holding member includes a lens holding part that holds the microlens array. The lens holding part is disposed at a position between the first fixing part and the second fixing part in a direction orthogonal to the light receiving surface.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: March 7, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventor: Eichi Koizumi
  • Publication number: 20160274277
    Abstract: A microlens substrate includes a light receiving section that includes a light receiving surface configured to receive light, a supporting member that fixes the light receiving section, a lens array that includes a plurality of lenses configured to guide the light to the light receiving section, a lens holding member that holds the lens array, and a fixing member that fixes the supporting member and the lens holding member. The fixing member includes a first fixing part that fixes the lens holding member and a second fixing member that fixes the supporting member. The lens holding member includes a lens holding part that holds the lens array. The lens holding part is disposed at a position between the first fixing part and the second fixing part in a direction orthogonal to the light receiving surface.
    Type: Application
    Filed: March 16, 2016
    Publication date: September 22, 2016
    Inventor: Eichi KOIZUMI
  • Patent number: 8879963
    Abstract: A toner supplying device including a secondary toner container, a first feeding member performing a first feeding operation of feeding toner from a toner container to the secondary container on demand, a second feeding member performing a second feeding operation of feeding the toner from the secondary container to a developing device on demand, and a toner supply controller controlling the amount of the toner in the secondary container to be greater than a predetermined amount. The controller performs first control in which when the first feeding operation is performed, the amount of the toner fed in the second feeding operation per unit of time is decreased, or second control in which when the amount of the toner fed in the second feeding operation is greater than a predetermined amount, the amount of the toner fed in the first feeding operation per unit of time is decreased.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: November 4, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Yushi Hirayama, Eichi Koizumi, Hitoshi Ishibashi, Tetsuya Muto
  • Patent number: 8615174
    Abstract: An image forming apparatus includes a latent image carrier; an image information obtaining unit; a latent image forming unit; a developer carrier; a developing device to develop the latent image by adhering toner onto the latent image carried on a latent image carrier; a toner replenishing device to replenish toner to the developing device; and a controller to adjust a toner replenishment amount by controlling drive of the toner replenishing device based on the image information. When the drive of the developing device is stopped, information relating to unreplenished portion of the toner replenishment amount excluding the already replenished amount from the toner replenishment amount based on the image information is stored in a nonvolatile memory, and the drive of the toner replenishing device is controlled using the stored information relating to the unreplenished portion of the toner replenishment amount when the drive of the developing device is resumed.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: December 24, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Eichi Koizumi, Makoto Komatsu
  • Patent number: 8311423
    Abstract: An image forming apparatus that includes a latent image carrier, a latent image forming unit, a developing unit, a toner supplier, a toner concentration detector, a prediction calculator, and a toner supply controller. The toner supplier includes a single driving source and supplies toner to a two-component developer at a predetermined supply position by driving a toner supply member with the driving source. The toner concentration detector detects a toner concentration in the developer at a predetermined detection position located upstream of the supply position. The prediction calculator predicts changes in the toner concentration in the developer over time at a prediction position located at the supply position or downstream of the supply position and upstream of a developer feed position to the developer carrier when toner is not supplied. The toner supply controller adjusts an amount of the toner supplied based on the prediction.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: November 13, 2012
    Assignee: Ricoh Company, Limited
    Inventors: Eichi Koizumi, Shinji Kato
  • Patent number: 8254795
    Abstract: A supply control unit is configured to, in a successive image-forming operation, perform a process of successively generating a driving control pattern for a toner supply device based on image information of each page, and synthesizing an unused portion of the driving control pattern which is obtained by eliminating a portion of the driving control pattern already reflected on a driving control of the toner supply device from the driving control pattern generated based on image information of a previous page with a driving control pattern generated based on a subsequent page.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: August 28, 2012
    Assignee: Ricoh Company, Limited
    Inventors: Eichi Koizumi, Nobutaka Takeuchi, Akira Yoshida, Shinji Kato
  • Patent number: 8238768
    Abstract: A first developer container having a toner supplying opening is provided in a developing unit. A toner concentration sensor is arranged downstream of the toner supplying opening to detect toner concentration in developer. A supply controlling unit is provided to determine an excess or a shortage in the amount of supplied toner based on image information correspondingly to a detection result by the toner concentration sensor, and to correct the driving amount of a toner supplying unit that has been determined based on the image information correspondingly to the recognized excess or shortage in the amount of supplied toner.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: August 7, 2012
    Assignee: Ricoh Company, Limited
    Inventors: Eichi Koizumi, Nobutaka Takeuchi, Akira Yoshida, Shinji Kato
  • Publication number: 20120163845
    Abstract: An image forming apparatus that includes a latent image carrier, a latent image forming unit, a developing unit, a toner supplier, a toner concentration detector, a prediction calculator, and a toner supply controller. The toner supplier includes a single driving source and supplies toner to a two-component developer at a predetermined supply position by driving a toner supply member with the driving source. The toner concentration detector detects a toner concentration in the developer at a predetermined detection position located upstream of the supply position. The prediction calculator predicts changes in the toner concentration in the developer over time at a prediction position located at the supply position or downstream of the supply position and upstream of a developer feed position to the developer carrier when toner is not supplied. The toner supply controller adjusts an amount of the toner supplied based on the prediction.
    Type: Application
    Filed: February 9, 2012
    Publication date: June 28, 2012
    Inventors: Eichi KOIZUMI, Shinji Kato
  • Patent number: 8139962
    Abstract: An image forming apparatus includes a latent image carrier, a latent image forming unit, a developing unit, a toner supplier, a toner concentration detector, a prediction calculator, and a toner supply controller. The toner supplier includes a single driving source and supplies toner to a two-component developer at a predetermined supply position by driving a toner supply member with the driving source. The toner concentration detector detects a toner concentration in the developer at a predetermined detection position located upstream of the supply position. The prediction calculator predicts changes in the toner concentration in the developer over time at a prediction position located at the supply position or downstream of the supply position and upstream of a developer feed position to the developer carrier when toner is not supplied, based on a result of the toner concentration detection. The toner supply controller adjusts an amount of the toner supplied based on the prediction.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: March 20, 2012
    Assignee: Ricoh Company Limited
    Inventors: Eichi Koizumi, Shinji Kato
  • Publication number: 20120027434
    Abstract: An image forming apparatus includes a latent image carrier; an image information obtaining unit; a latent image forming unit; a developer carrier; a developing device to develop the latent image by adhering toner onto the latent image carried on a latent image carrier; a toner replenishing device to replenish toner to the developing device; and a controller to adjust a toner replenishment amount by controlling drive of the toner replenishing device based on the image information. When the drive of the developing device is stopped, information relating to unreplenished portion of the toner replenishment amount excluding the already replenished amount from the toner replenishment amount based on the image information is stored in a nonvolatile memory, and the drive of the toner replenishing device is controlled using the stored information relating to the unreplenished portion of the toner replenishment amount when the drive of the developing device is resumed.
    Type: Application
    Filed: July 27, 2011
    Publication date: February 2, 2012
    Inventors: Eichi KOIZUMI, Makoto KOMATSU
  • Publication number: 20110110689
    Abstract: A toner supplying device including a secondary toner container, a first feeding member performing a first feeding operation of feeding toner from a toner container to the secondary container on demand, a second feeding member performing a second feeding operation of feeding the toner from the secondary container to a developing device on demand, and a toner supply controller controlling the amount of the toner in the secondary container to be greater than a predetermined amount. The controller performs first control in which when the first feeding operation is performed, the amount of the toner fed in the second feeding operation per unit of time is decreased, or second control in which when the amount of the toner fed in the second feeding operation is greater than a predetermined amount, the amount of the toner fed in the first feeding operation per unit of time is decreased.
    Type: Application
    Filed: October 19, 2010
    Publication date: May 12, 2011
    Inventors: Yushi HIRAYAMA, Eichi Koizumi, Hitoshi Ishibashi, Tetsuya Muto
  • Publication number: 20100086320
    Abstract: A first developer container having a toner supplying opening is provided in a developing unit. A toner concentration sensor is arranged downstream of the toner supplying opening to detect toner concentration in developer. A supply controlling unit is provided to determine an excess or a shortage in the amount of supplied toner based on image information correspondingly to a detection result by the toner concentration sensor, and to correct the driving amount of a toner supplying unit that has been determined based on the image information correspondingly to the recognized excess or shortage in the amount of supplied toner.
    Type: Application
    Filed: October 1, 2009
    Publication date: April 8, 2010
    Inventors: Eichi KOIZUMI, Nobutaka Takeuchi, Akira Yoshida, Shinji Kato