Patents by Inventor Toshiki Hayashi

Toshiki Hayashi 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: 11367881
    Abstract: An object of the present disclosure is to provide a method for manufacturing a fuel cell that ensures developing a high adhesive strength to a separator. One aspect of an embodiment is a method for manufacturing a fuel cell where a pair of separators are mutually bonded with a sealing member. The sealing member includes a thermoplastic resin containing a crystalline polymer as an adhesive layer. The method for manufacturing the fuel cell includes: preparing a stack structure in which the sealing member is disposed between the pair of separators; heating the stack structure at a melting point or higher of the thermoplastic resin; after the heating, holding the stack structure in a temperature range of ±10° C. of a crystallization temperature of the thermoplastic resin to promote a crystallization of the thermoplastic resin; and after the holding, further cooling the stack structure.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: June 21, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toshiki Sugimoto, Makoto Yoshida, Shunsuke Suzuki, Tomokazu Hayashi, Shinya Takeshita, Takuya Mitsuoka, Yoshitake Suganuma, Yuichi Kato, Kyoko Nakai
  • Patent number: 10209645
    Abstract: A developing device includes a casing to contain developer, a developer bearer, an upper and lower developer conveyors to convey the developer to one side in an axial direction of rotation shafts thereof, a communicating portion disposed on a first end side on which an input gear is disposed, to fall the developer from the upper developer conveyor to the lower developer conveyor, bearings to receive end portions the upper and lower developer conveyors, and first and second end seals to seal gaps in the bearings on the upper and lower developer conveyors, respectively. The first end seals and the second end are disposed on the first end side and a second end side, respectively. A sliding friction between the rotation shaft and at least one of the first end seals is smaller than a sliding friction between the rotation shaft and the second end seal.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: February 19, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuuki Tsuchiya, Masayuki Yamane, Keiichi Yoshida, Atsushi Kurokawa, Toshiki Hayashi, Tatsuya Ohhira
  • Patent number: 10168642
    Abstract: A developing device includes upper and lower developer containing portions to contain developer, arranged in a vertical direction, a first developer conveyor to convey developer in the upper developer containing portion to a first side in an axial direction of the first developer conveyor, a second developer conveyor to convey developer in the lower developer containing portion to a second side opposite the first side, a developer-lifting area in which the developer is lifted from the lower developer containing portion to the upper developer containing portion, a first lifting area gear to rotate the first developer conveyor, a second lifting area gear to rotate the second developer conveyor, and a lifting area input gear to input a driving force to the developing device. The lifting area input gear is coupled to the first lifting area gear and coupled via the first lifting area gear via to the second lifting area gear.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: January 1, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Ohhira, Masayuki Yamane, Keiichi Yoshida, Atsushi Kurokawa, Toshiki Hayashi, Yuuki Tsuchiya
  • Patent number: 10114334
    Abstract: A developing device includes a developer bearer, a casing defining an upper compartment to contain the developer and a lower compartment disposed lower than the upper compartment, to contain the developer, and a first conveyor and a second conveyor disposed in the upper compartment and the lower compartment, respectively, to convey the developer in a longitudinal direction of the developer bearer and circulate the developer between the upper compartment and the lower compartment through a first communicating opening, through which the developer is conveyed upward, and a second communicating opening. A developer-lifting range of the upper compartment, which opposes the first communicating opening, is larger in volume than a developer-lifting range of the lower compartment. One of the upper compartment and the lower compartment is disposed adjacent to the developer bearer to supply the developer to the developer bearer.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: October 30, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Ohhira, Masayuki Yamane, Keiichi Yoshida, Atsushi Kurokawa, Toshiki Hayashi, Yuuki Tsuchiya
  • Publication number: 20180143568
    Abstract: A developing device includes upper and lower developer containing portions to contain developer, arranged in a vertical direction, a first developer conveyor to convey developer in the upper developer containing portion to a first side in an axial direction of the first developer conveyor, a second developer conveyor to convey developer in the lower developer containing portion to a second side opposite the first side, a developer-lifting area in which the developer is lifted from the lower developer containing portion to the upper developer containing portion, a first lifting area gear to rotate the first developer conveyor, a second lifting area gear to rotate the second developer conveyor, and a lifting area input gear to input a driving force to the developing device. The lifting area input gear is coupled to the first lifting area gear and coupled via the first lifting area gear via to the second lifting area gear.
    Type: Application
    Filed: September 28, 2017
    Publication date: May 24, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Tatsuya Ohhira, Masayuki Yamane, Keiichi Yoshida, Atsushi Kurokawa, Toshiki Hayashi, Yuuki Tsuchiya
  • Publication number: 20180136586
    Abstract: A developing device includes a casing to contain developer, a developer bearer, an upper and lower developer conveyors to convey the developer to one side in an axial direction of rotation shafts thereof, a communicating portion disposed on a first end side on which an input gear is disposed, to fall the developer from the upper developer conveyor to the lower developer conveyor, bearings to receive end portions the upper and lower developer conveyors, and first and second end seals to seal gaps in the bearings on the upper and lower developer conveyors, respectively. The first end seals and the second end are disposed on the first end side and a second end side, respectively. A sliding friction between the rotation shaft and at least one of the first end seals is smaller than a sliding friction between the rotation shaft and the second end seal.
    Type: Application
    Filed: September 6, 2017
    Publication date: May 17, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Yuuki TSUCHIYA, Masayuki YAMANE, Keiichi YOSHIDA, Atsushi KUROKAWA, Toshiki HAYASHI, Tatsuya OHHIRA
  • Patent number: 9864297
    Abstract: A developing device includes a developer bearer, a magnetic field generator, a casing having an opening, a developer conveyor to rotate inside a developer containing compartment below the developer bearer, and a developer regulator. A side wall of the casing defines a bottom end of the opening, and the developer regulator is disposed on the side wall. The side wall includes an upper end face facing the developer bearer below an axis of the developer bearer and a curved inner face along an orbit of rotation of the developer conveyor, extending from below the developer conveyor toward the upper end face. On a virtual plane perpendicular to the axis of the developer bearer, an intersection between a tangent line to an upper end of the curved inner face and the surface of the developer bearer is in a range from a tangential magnetic-flux peak and a closest approach point.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: January 9, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Ohhira, Atsushi Kurokawa, Masayuki Yamane, Keiichi Yoshida, Toshiki Hayashi, Sayuri Katoh
  • Publication number: 20170293257
    Abstract: A developing device includes a developer bearer, a casing defining an upper compartment to contain the developer and a lower compartment disposed lower than the upper compartment, to contain the developer, and a first conveyor and a second conveyor disposed in the upper compartment and the lower compartment, respectively, to convey the developer in a longitudinal direction of the developer bearer and circulate the developer between the upper compartment and the lower compartment through a first communicating opening, through which the developer is conveyed upward, and a second communicating opening. A developer-lifting range of the upper compartment, which opposes the first communicating opening, is larger in volume than a developer-lifting range of the lower compartment. One of the upper compartment and the lower compartment is disposed adjacent to the developer bearer to supply the developer to the developer bearer.
    Type: Application
    Filed: March 23, 2017
    Publication date: October 12, 2017
    Inventors: Tatsuya OHHIRA, Masayuki YAMANE, Keiichi YOSHIDA, Atsushi KUROKAWA, Toshiki HAYASHI, Yuuki TSUCHIYA
  • Patent number: 9713177
    Abstract: A management device includes: an estimator configured to estimate whether or not mobile station devices each requests a wireless connection at a target time after a current time; and an instructor configured to instruct a control device, configured to control calls of the mobile station devices, to execute a process of causing a first mobile station device to request the wireless connection at a first time before the target time and causing a second mobile station device that is different from the first mobile station device to request the wireless connection at a second time that is before the target time and different from the first time, in a case where the number of mobile station devices that are each estimated to request the wireless connection to the control device at the target time exceeds a predetermined value.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: July 18, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Toshiki Hayashi, Fumihiko Yokota
  • Publication number: 20170090342
    Abstract: A developing device includes a developer bearer, a magnetic field generator, a easing having an opening, a developer conveyor to rotate inside a developer containing compartment below the developer bearer, and a developer regulator. A side wall of the casing defines a bottom end of the opening, and the developer regulator is disposed on the side wall. The side wall includes an upper end face facing the developer bearer below an axis of the developer bearer and a curved inner face along an orbit of rotation of the developer conveyor, extending from below the developer conveyor toward the upper end face. On a virtual plane perpendicular to the axis of the developer bearer, an intersection between a tangent line to an upper end of the curved inner face and the surface of the developer bearer is in a range from a tangential magnetic-flux peak and a closest approach point.
    Type: Application
    Filed: September 30, 2016
    Publication date: March 30, 2017
    Inventors: Tatsuya OHHIRA, Atsushi Kurokawa, Masayuki Yamane, Keiichi Yoshida, Toshiki Hayashi
  • Patent number: 9513575
    Abstract: A removable device is removably attachable to an image forming apparatus main body. The removable device includes an information storage device, a holder, and a low frictional structure. The information storage device includes: an information storage unit that stores information to be communicated between the apparatus main body and the removable device; a terminal to be contacted with an apparatus main-body terminal, for communicating information with the apparatus main body; and a substrate that holds the information storage unit and the terminal and that includes a guide to be fitted to a protrusion provided on the apparatus main body. The holder holds the substrate such that the substrate can move, when the removable device approaches the apparatus main-body terminal, on a virtual plane intersecting with a moving direction of the removable device. The low frictional structure is arranged on a contact area between the substrate and the holder.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: December 6, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hideki Kimura, Masaki Takahashi, Toshiki Hayashi, Masayuki Yamane
  • Patent number: 9170530
    Abstract: A powder container includes a cylindrical container body to contain a powder, having an opening in one end thereof, to convey the powder contained in the container body to the opening with rotation of the container body, and having a container-body projection provided on an outer circumferential surface of the container body; and a cylindrical holder, into which the end of the container body having the opening is inserted, to hold the container body rotatably, having a powder outlet through which the powder is discharged from the holder and a holder projection provided on an inner circumferential surface thereof. The container-body projection repetitively contacts and separates from the holder projection with rotation of the container body to vibrate the container body and the holder.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: October 27, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuki Oshikawa, Yuuki Satoh, Takuya Seshita, Toshiki Hayashi, Masashi Nagayama, Hiroyuki Uenishi, Tomoji Ishikawa
  • Publication number: 20150043342
    Abstract: A management device includes: an estimator configured to estimate whether or not mobile station devices each requests a wireless connection at a target time after a current time; and an instructor configured to instruct a control device, configured to control calls of the mobile station devices, to execute a process of causing a first mobile station device to request the wireless connection at a first time before the target time and causing a second mobile station device that is different from the first mobile station device to request the wireless connection at a second time that is before the target time and different from the first time, in a case where the number of mobile station devices that are each estimated to request the wireless connection to the control device at the target time exceeds a predetermined value.
    Type: Application
    Filed: July 29, 2014
    Publication date: February 12, 2015
    Applicant: FUJITSU LIMITED
    Inventors: Toshiki Hayashi, Fumihiko Yokota
  • Patent number: 8953987
    Abstract: A development device includes a development casing, a developer bearer, a first developer conveyance member to supply developer to the developer bearer, a second developer conveyance member to transport developer axially, and a partition dividing an interior of the development casing into a supply channel and a collecting channel via which developer received from a downstream end portion of the supply channel is forwarded to an upstream end portion of the supply channel. The supply channel includes a conveyance area and a buffer area disposed adjacent to the conveyance area in a direction perpendicular to an axial direction to temporarily retain developer and midway in the developer conveyance direction inside the supply channel, and an upstream end face defining an upstream end of the buffer area is inclined relative to the axial direction to draw away from the conveyance area downstream in the developer conveyance direction.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: February 10, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideki Kimura, Kunihiro Ohyama, Masayuki Yamane, Yoshihiro Fujiwara, Masaki Takahashi, Toshiki Hayashi
  • Publication number: 20150037050
    Abstract: A removable device is removably attachable to an image forming apparatus main body. The removable device includes an information storage device, a holder, and a low frictional structure. The information storage device includes: an information storage unit that stores information to be communicated between the apparatus main body and the removable device; a terminal to be contacted with an apparatus main-body terminal, for communicating information with the apparatus main body; and a substrate that holds the information storage unit and the terminal and that includes a guide to be fitted to a protrusion provided on the apparatus main body. The holder holds the substrate such that the substrate can move, when the removable device approaches the apparatus main-body terminal, on a virtual plane intersecting with a moving direction of the removable device. The low frictional structure is arranged on a contact area between the substrate and the holder.
    Type: Application
    Filed: July 23, 2014
    Publication date: February 5, 2015
    Inventors: Hideki KIMURA, Masaki TAKAHASHI, Toshiki HAYASHI, Masayuki YAMANE
  • Publication number: 20140376970
    Abstract: A development device includes a development casing, a developer bearer, a first developer conveyance member to supply developer to the developer bearer, a second developer conveyance member to transport developer axially, and a partition dividing an interior of the development casing into a supply channel and a collecting channel via which developer received from a downstream end portion of the supply channel is forwarded to an upstream end portion of the supply channel. The supply channel includes a conveyance area and a buffer area disposed adjacent to the conveyance area in a direction perpendicular to an axial direction to temporarily retain developer and midway in the developer conveyance direction inside the supply channel, and an upstream end face defining an upstream end of the buffer area is inclined relative to the axial direction to draw away from the conveyance area downstream in the developer conveyance direction.
    Type: Application
    Filed: September 10, 2014
    Publication date: December 25, 2014
    Inventors: Hideki KIMURA, Kunihiro OHYAMA, Masayuki YAMANE, Yoshihiro FUJIWARA, Masaki TAKAHASHI, Toshiki HAYASHI
  • Patent number: 8918028
    Abstract: A toner conveying path forming member forms a toner conveying path with a hollow capable of conveying toner. The toner conveying path forming member includes an inner wall a part of which is pressed by an elastic toner conveying member provided in the toner conveying path; and a protrusion that is provided on an inner wall surface of at least a part of the inner wall to protrude toward the hollow.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: December 23, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Masaki Takahashi, Toshiki Hayashi
  • Patent number: 8909095
    Abstract: A process cartridge installed in a body of an image forming apparatus includes an image bearer, a development device that includes a developer bearer, a rotary developer conveyance member, and a shaft projecting from a development casing in an axial direction, a gear train including an idler gear provided to the shaft projecting from the development casing, a first side plate, and a hollow shaft projecting in the axial direction from the first side plate. The first side plate includes an image bearer positioning portion and a developer bearer positioning portion to support axial end portions of the developer bearer and the image bearer, the shaft projecting from the development casing is inserted into a recess inside the hollow shaft, and the hollow shaft is inserted into a hollow shaft positioning hole formed in the body.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: December 9, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Masayuki Yamane, Kunihiro Ohyama, Hideki Kimura, Masaki Takahashi, Yoshihiro Fujiwara, Toshiki Hayashi
  • Patent number: 8873979
    Abstract: A development device includes a developer container for containing developer, a developer bearer to carry by rotation the developer contained in the developer container to a development range facing a latent image bearer, a partition dividing the developer container into an upper compartment and a lower compartment arranged vertically, an upper developer conveyance member disposed in the upper compartment, a lower developer conveyance member disposed in the lower compartment, a communication portion through which the developer moves from the lower compartment to the upper compartment, disposed in a downstream end portion of the lower compartment in a direction in which the lower developer conveyance member transports the developer, and a toner concentration detector to detect a concentration of toner in the developer beneath the communication portion inside the lower compartment.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: October 28, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiro Fujiwara, Kunihiro Ohyama, Masayuki Yamane, Hideki Kimura, Masaki Takahashi, Toshiki Hayashi
  • Patent number: 8855536
    Abstract: A development device includes a development casing, a developer bearer, a first developer conveyance member to supply developer to the developer bearer, a second developer conveyance member to transport developer axially, and a partition dividing an interior of the development casing into a supply channel and a collecting channel via which developer received from a downstream end portion of the supply channel is forwarded to an upstream end portion of the supply channel. The supply channel includes a conveyance area and a buffer area disposed adjacent to the conveyance area in a direction perpendicular to an axial direction to temporarily retain developer and midway in the developer conveyance direction inside the supply channel, and an upstream end face defining an upstream end of the buffer area is inclined relative to the axial direction to draw away from the conveyance area downstream in the developer conveyance direction.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: October 7, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideki Kimura, Kunihiro Ohyama, Masayuki Yamane, Yoshihiro Fujiwara, Masaki Takahashi, Toshiki Hayashi