Patents by Inventor Satoshi Muramatsu

Satoshi Muramatsu 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: 9627136
    Abstract: A multilayer ceramic capacitor includes an external electrode that is unlikely to be peeled. First and second external electrodes each include base layers provided over a ceramic body and including a metal and glass, and Cu plated layers provided over the base layers. The multilayer ceramic capacitor includes a reactive layer. The reactive layer contains about 5 atomic % to about 15 atomic % of Ti, about 5 atomic % to about 15 atomic % of Si, and about 2 atomic % to about 10 atomic % of V.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: April 18, 2017
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Yasuhiro Nishisaka, Takehisa Sasabayashi, Satoshi Muramatsu
  • Publication number: 20160093440
    Abstract: A multilayer ceramic capacitor includes an external electrode that is unlikely to be peeled. First and second external electrodes each include base layers provided over a ceramic body and including a metal and glass, and Cu plated layers provided over the base layers. The multilayer ceramic capacitor includes a reactive layer. The reactive layer contains about 5 atomic % to about 15 atomic % of Ti, about 5 atomic % to about 15 atomic % of Si, and about 2 atomic % to about 10 atomic % of V.
    Type: Application
    Filed: September 28, 2015
    Publication date: March 31, 2016
    Inventors: Yasuhiro NISHISAKA, Takehisa SASABAYASHI, Satoshi MURAMATSU
  • Publication number: 20160084249
    Abstract: A variable displacement vane pump includes a notch portion which is a flow path provided to extend from an initiating end of a discharge port towards a terminating end side of a suction port. The notch portion is formed so that a sectional area of the flow path is smaller than a sectional area of the discharge port at the initiating end thereof and that a length of the flow path in a circumferential direction is 1.5 pitches or larger. The terminating end of the suction port is a point where the vane in the suction area last overlaps the suction port. The initiating end of the discharge port is a point where the vane departed from the suction area first overlaps the discharge port. One pitch is a distance defied in the circumferential direction between adjacent vanes of the plurality of vanes.
    Type: Application
    Filed: March 17, 2015
    Publication date: March 24, 2016
    Applicant: HITACHI AUTOMOTIVE SYSTEMS STEERING, LTD.
    Inventors: Satoshi Muramatsu, Yutaka Ogiwara, Masaaki Aoki, Norikazu Kumasaka, Yoshiaki Kido
  • Publication number: 20150226215
    Abstract: A variable displacement vane pump and a power steering system are to be provided which can secure a discharge flow rate when a steering wheel is turned while restricting the discharge flow rate when the steering wheel is not turned. In a variable displacement vane pump and a power steering system, a bypass line is formed which causes a hydraulic fluid in a high pressure chamber of a control valve which controls an eccentricity of a cam ring to flow directly to a low pressure chamber side of the control valve when a steering wheel is turned.
    Type: Application
    Filed: February 19, 2014
    Publication date: August 13, 2015
    Applicant: Hitachi Automotive Systems Steering, Ltd.
    Inventors: Yukio Uchida, Hiroki Imanaga, Satoshi Muramatsu
  • Publication number: 20150078944
    Abstract: A variable displacement vane pump is provided. This pump includes a pump housing including, a driving shaft, a rotor, a plurality of vanes, a cam support surface, a cam ring, an intake port formed at the pump housing, a discharge port formed at the pump housing, and a cam ring control mechanism disposed at the pump housing and configured to control an eccentric amount of the cam ring with respect to the rotor. The cam support surface is formed in such a manner that a shortest distance between the cam support surface and a reference line decreases from a second confining region side toward a first confining region side, and the cam ring is formed in such a manner that a cam profile radius change rate decreases first and then increases again on the second confining region side when eccentric amount of the cam ring is maximized.
    Type: Application
    Filed: September 17, 2014
    Publication date: March 19, 2015
    Applicant: HITACHI AUTOMOTIVE SYSTEMS STEERING, LTD.
    Inventors: Norikazu KUMASAKA, Masaaki IIJIMA, Yukio UCHIDA, Satoshi MURAMATSU
  • Patent number: 8849172
    Abstract: A fixing device includes a first roller, a second roller, an endless rotary belt, a third roller, a heater, a belt cooler, and an upstream guide member. The second roller is disposed parallel to the first roller. The endless rotary belt is looped for rotation around the first and second rollers. The third roller is disposed opposite the first roller via the belt. The heater is positioned adjacent to the belt to heat the belt. The first and third rollers press against each other via the belt to form a nip therebetween. The belt cooler is disposed inside the loop of the belt downstream from the first roller and upstream from the second roller for cooling the belt. The belt cooler has a convex contact surface. The upstream guide member is disposed inside the loop of the belt upstream from the contact surface to guide the belt.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: September 30, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroyuki Kunii, Akiyasu Amita, Kunihiko Tomita, Satoshi Muramatsu
  • Patent number: 8774692
    Abstract: A fixing device includes a fuser member, a stripper member, an endless rotary belt, a heater, a pressure member, and a belt cooler. The stripper member is disposed parallel to the fuser member. The endless rotary belt is looped for rotation around the fuser member and the stripper member in a longitudinal, conveyance direction of the belt. The heater is disposed adjacent to the belt to heat the belt. The pressure member is disposed opposite the fuser member via the belt. The fuser member and the pressure member press against each other via the belt to form a fixing nip therebetween. The recording medium after passage through the nip remains in contact with the belt as the belt moves from the fuser member toward the stripper member, and separates from the belt as the belt passes around the stripper member.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: July 8, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Muramatsu, Kunihiko Tomita, Akiyasu Amita, Hiroyuki Kunii
  • Patent number: 8755730
    Abstract: A glossing device includes a heater member, a stripper member, an endless rotary belt, a pressure member, and a belt cooler. The heater member is subjected to heating. The stripper member is disposed parallel to the heater member. The endless rotary belt is looped for rotation around the heater member and the stripper member in a longitudinal, conveyance direction of the belt. The pressure member is disposed opposite the heater member via the belt. The heater member and the pressure member press against each other via the belt to form a glossing nip therebetween. The recording medium after passage through the nip remains in contact with the belt as the belt moves from the heater member toward the stripper member, and separates from the belt as the belt passes around the stripper member. The belt cooler is disposed adjacent to the belt to cool the belt.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: June 17, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Akiyasu Amita, Hiroyuki Kunii, Satoshi Muramatsu, Kunihiko Tomita
  • Publication number: 20140161485
    Abstract: A developing device is provided capable of properly maintaining charging characteristics of developer and configured to be easily assembled.
    Type: Application
    Filed: December 10, 2013
    Publication date: June 12, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Manabu Ono, Satoshi Muramatsu
  • Patent number: 8688021
    Abstract: A glossing device includes a first roller, a second roller, an endless rotary belt, a third roller, a heater, a belt cooler, and a suction mechanism. The second roller is disposed parallel to the first roller. The endless rotary belt is looped for rotation around the first and second rollers. The third roller is disposed opposite the first roller via the belt. The heater is disposed adjacent to the belt to heat the belt. The first and third rollers press against each other via the belt to form a nip therebetween. The belt cooler is disposed inside the loop of the belt downstream from the first roller and upstream from the second roller for cooling the belt. The belt cooler includes at least two mutually spaced cooling elements that together form a gapped contact surface for establishing thermal contact with the belt.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: April 1, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroyuki Kunii, Akiyasu Amita, Satoshi Muramatsu, Kunihiko Tomita
  • Patent number: 8457540
    Abstract: A belt-fixing device to fix a toner image on a sheet includes an endless belt, a first roller disposed inside the endless belt, a second roller disposed in contact with the first roller via the endless belt, forming a fixing nip therebetween through which a recording medium passes, and a ring shape edge for controlling movement of the belt in an axial direction, provided on an inner surface of the endless belt. The ring shape edge is positioned between the first roller and the second roller.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: June 4, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Muramatsu, Kunihiko Tomita, Misaki Shimizu
  • Publication number: 20130004220
    Abstract: A fixing device includes a fuser member, a stripper member, an endless rotary belt, a heater, a pressure member, and a belt cooler. The stripper member is disposed parallel to the fuser member. The endless rotary belt is looped for rotation around the fuser member and the stripper member in a longitudinal, conveyance direction of the belt. The heater is disposed adjacent to the belt to heat the belt. The pressure member is disposed opposite the fuser member via the belt. The fuser member and the pressure member press against each other via the belt to form a fixing nip therebetween. The recording medium after passage through the nip remains in contact with the belt as the belt moves from the fuser member toward the stripper member, and separates from the belt as the belt passes around the stripper member.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 3, 2013
    Applicant: RICOH COMPANY, LTD.
    Inventors: Satoshi Muramatsu, Kunihiko Tomita, Akiyasu Amita, Hiroyuki Kunii
  • Publication number: 20120328344
    Abstract: A glossing device includes a first roller, a second roller, an endless rotary belt, a third roller, a heater, a belt cooler, and a suction mechanism. The second roller is disposed parallel to the first roller. The endless rotary belt is looped for rotation around the first and second rollers. The third roller is disposed opposite the first roller via the belt. The heater is disposed adjacent to the belt to heat the belt. The first and third rollers press against each other via the belt to form a nip therebetween. The belt cooler is disposed inside the loop of the belt downstream from the first roller and upstream from the second roller for cooling the belt. The belt cooler includes at least two mutually spaced cooling elements that together form a gapped contact surface for establishing thermal contact with the belt.
    Type: Application
    Filed: May 15, 2012
    Publication date: December 27, 2012
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hiroyuki Kunii, Akiyasu Amita, Satoshi Muramatsu, Kunihiko Tomita
  • Publication number: 20120328346
    Abstract: A glossing device includes a heater member, a stripper member, an endless rotary belt, a pressure member, and a belt cooler. The heater member is subjected to heating. The stripper member is disposed parallel to the heater member. The endless rotary belt is looped for rotation around the heater member and the stripper member in a longitudinal, conveyance direction of the belt. The pressure member is disposed opposite the heater member via the belt. The heater member and the pressure member press against each other via the belt to form a glossing nip therebetween. The recording medium after passage through the nip remains in contact with the belt as the belt moves from the heater member toward the stripper member, and separates from the belt as the belt passes around the stripper member. The belt cooler is disposed adjacent to the belt to cool the belt.
    Type: Application
    Filed: June 20, 2012
    Publication date: December 27, 2012
    Inventors: Akiyasu AMITA, Hiroyuki KUNII, Satoshi MURAMATSU, Kunihiko TOMITA
  • Publication number: 20120328343
    Abstract: A fixing device includes a first roller, a second roller, an endless rotary belt, a third roller, a heater, a belt cooler, and an upstream guide member. The second roller is disposed parallel to the first roller. The endless rotary belt is looped for rotation around the first and second rollers. The third roller is disposed opposite the first roller via the belt. The heater is positioned adjacent to the belt to heat the belt. The first and third rollers press against each other via the belt to form a nip therebetween. The belt cooler is disposed inside the loop of the belt downstream from the first roller and upstream from the second roller for cooling the belt. The belt cooler has a convex contact surface. The upstream guide member is disposed inside the loop of the belt upstream from the contact surface to guide the belt.
    Type: Application
    Filed: April 24, 2012
    Publication date: December 27, 2012
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hiroyuki Kunii, Akiyasu Amita, Kunihiko Tomita, Satoshi Muramatsu
  • Patent number: 8331840
    Abstract: In a fixing device, a first roller and a first fixing member are provided inside a loop formed by a first belt. A pressing member is pressed against the first roller and the first fixing member via the first belt. The first roller includes at least two enlarged radius portions of enlarged radius arranged axially along the first roller, at least one reduced radius portion of reduced radius sandwiched between the adjacent two enlarged radius portions in an axial direction of the first roller, and a concave portion formed by the reduced radius portion and the adjacent two enlarged radius portions sandwiching the reduced radius portion. The first fixing member is interdigitated with the first roller with play between the first fixing member and the first roller.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: December 11, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Yukimichi Someya, Kunihiko Tomita, Satoshi Muramatsu
  • Patent number: 8180261
    Abstract: An image forming apparatus of the present invention includes a developing unit for developing a latent image formed on an image carrier with a two-ingredient type developer, i.e., a toner and carrier mixture. A toner replenishing device replenishes toner stored in a toner storing portion to the developing unit. A carrier storing portion, storing a carrier therein, is constructed independently of the toner storing portion. The carrier is fed from the carrier storing portion to the developing unit by a toner conveying force available with the toner replenishing device.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: May 15, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Muramatsu, Nobuo Iwata, Nobutaka Takeuchi, Junichi Matsumoto, Takayuki Koike, Eriko Maruyama
  • Patent number: 7917055
    Abstract: A toner container includes a vessel for storing toner, a toner draining unit having a toner draining passage, and a shutter in the toner draining passage. The toner draining passage includes a horizontal passage and a connection passage. Further, the toner draining unit includes the horizontal passage, a middle part, and an external part.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: March 29, 2011
    Assignee: Ricoh Company, Limited
    Inventors: Goro Katsuyama, Nobuo Iwata, Nobuo Kasahara, Satoshi Muramatsu, Junichi Matsumoto
  • Publication number: 20110064493
    Abstract: A belt-fixing device to fix a toner image on a sheet includes an endless belt, a first roller disposed inside the endless belt, a second roller disposed in contact with the first roller via the endless belt, forming a fixing nip therebetween through which a recording medium passes, and a ring shape edge for controlling movement of the belt in an axial direction, provided on an inner surface of the endless belt. The ring shape edge is positioned between the first roller and the second roller.
    Type: Application
    Filed: September 15, 2010
    Publication date: March 17, 2011
    Inventors: Satoshi MURAMATSU, Kunihiko Tomita, Misaki Shimizu
  • Patent number: 7904006
    Abstract: A toner replenishing device that provides a container and a device having a high toner volumetric efficiency and a low cost, suppresses vibration during replenishment to a minimum, and stores recovered toner without impairing the volumetric efficiency of unused toner is constituted by a developer replenishing device which is provided with a developer container storing a developer used in an image forming apparatus and replenishes a developing device of the image forming apparatus with the developer in the developer container. The developer container is rectangular in a horizontal direction, and comprises an outside container storing unused developer and a deformable inside container enveloped by the outside container.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: March 8, 2011
    Assignee: Ricoh Company, Ltd.
    Inventor: Satoshi Muramatsu