Patents by Inventor Tadashi Akiyama

Tadashi Akiyama 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: 11260760
    Abstract: There is provided a fuel cell vehicle that allows minimally suppressing damage of a fuel cell stack and a high voltage component as important components when the vehicle collides from a front side. An ion exchanger as a first component includes a tubular portion and a cap portion. When the front side of the fuel cell vehicle collides, the tubular portion deforms due to an impact load from a radiator as a second component moving toward the ion exchanger to buffer an impact from the radiator. The cap portion restricts additional deformation of a damper portion when the impact load from the radiator becomes a predetermined magnitude or more. A stack frame and a chassis are joined and fixed via mounts such that the stack frame is detached from the chassis due to the impact load from the radiator when the deformation of the tubular portion is restricted by the cap portion.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: March 1, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tadashi Akiyama, Minetaka Kawamoto
  • Patent number: 10730379
    Abstract: There is provided a fuel cell vehicle, including a high voltage system disposed in a front compartment of the vehicle, and a first protruding portion that protrudes in a left-right direction of the vehicle toward a vehicle body of the vehicle further than a portion of the high voltage system that is closest to the vehicle body, and is fixed to the high voltage system, in which, when the vehicle is placed on a horizontal plane, the first protruding portion is arranged such that a position of a first most-protruded portion of the first protruding portion that protrudes most toward the vehicle body in a height direction is located at the same position or higher than a center of gravity of the high voltage system.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: August 4, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomoki Tambo, Hirofumi Kanazawa, Tadashi Akiyama
  • Publication number: 20200130517
    Abstract: There is provided a fuel cell vehicle that allows minimally suppressing damage of a fuel cell stack and a high voltage component as important components when the vehicle collides from a front side. An ion exchanger as a first component includes a tubular portion and a cap portion. When the front side of the fuel cell vehicle collides, the tubular portion deforms due to an impact load from a radiator as a second component moving toward the ion exchanger to buffer an impact from the radiator. The cap portion restricts additional deformation of a damper portion when the impact load from the radiator becomes a predetermined magnitude or more. A stack frame and a chassis are joined and fixed via mounts such that the stack frame is detached from the chassis due to the impact load from the radiator when the deformation of the tubular portion is restricted by the cap portion.
    Type: Application
    Filed: October 25, 2019
    Publication date: April 30, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tadashi Akiyama, Minetaka Kawamoto
  • Publication number: 20180297461
    Abstract: There is provided a fuel cell vehicle, including a high voltage system disposed in a front compartment of the vehicle, and a first protruding portion that protrudes in a left-right direction of the vehicle toward a vehicle body of the vehicle further than a portion of the high voltage system that is closest to the vehicle body, and is fixed to the high voltage system, in which, when the vehicle is placed on a horizontal plane, the first protruding portion is arranged such that a position of a first most-protruded portion of the first protruding portion that protrudes most toward the vehicle body in a height direction is located at the same position or higher than a center of gravity of the high voltage system.
    Type: Application
    Filed: April 16, 2018
    Publication date: October 18, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomoki TAMBO, Hirofumi Kanazawa, Tadashi Akiyama
  • Patent number: 9821634
    Abstract: In a motor lock determination device (1), a lock determination on an electric motor (7) is performed such that: a first detection value (PI), which is a detection value (P) of a refrigerant pressure sensor (17) during a stop of an electric fan (5), is detected, and a second detection value (P2), which is a detection value (P) of the refrigerant pressure sensor (17) after the electric fan (5) is driven for a first predetermined time (?), is detected; when the second detection value (P2) is equal to the first detection value (PI) or more than the first detection value (PI), it is determined that a motor lock occurs; and when the second detection value (P2) is less than the first detection value (PI), it is determined that no motor lock occurs.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: November 21, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryo Yoshioka, Takanori Nakada, Tadashi Akiyama, Kashirou Fukami, Yuichiro Hirata
  • Publication number: 20160129755
    Abstract: In a motor lock determination device (1), a lock determination on an electric motor (7) is performed such that: a first detection value (PI), which is a detection value (P) of a refrigerant pressure sensor (17) during a stop of an electric fan (5), is detected, and a second detection value (P2), which is a detection value (P) of the refrigerant pressure sensor (17) after the electric fan (5) is driven for a first predetermined time (?), is detected; when the second detection value (P2) is equal to the first detection value (PI) or more than the first detection value (PI), it is determined that a motor lock occurs; and when the second detection value (P2) is less than the first detection value (PI), it is determined that no motor lock occurs.
    Type: Application
    Filed: May 7, 2014
    Publication date: May 12, 2016
    Inventors: Ryo YOSHIOKA, Takanori NAKADA, Tadashi AKIYAMA, Kashirou FUKAMI, Yuichiro HIRATA
  • Patent number: 8769803
    Abstract: Provided is a method of manufacturing a loudspeaker including assembling a magnetic circuit and a frame. In the step of assembling the magnetic circuit and the frame, parallelism between a plate and a damper attachment portion of the frame is ensured by bringing an upper portion of the plate and the damper attachment portion of the frame into contact with a jig. In addition, perpendicularity between a magnetic gap and the damper attachment portion of the frame is ensured by bringing an outer circumferential side portion of the plate of the magnetic gap and an inner circumferential side portion of the yoke into contact with the jig. The magnetic circuit and the frame are assembled in such a state. With such a manufacturing method, it is possible to achieve a superior loudspeaker capable of reducing a gap defect while being downsized and having increased maximum input power.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: July 8, 2014
    Assignee: Panasonic Corporation
    Inventors: Toshiyuki Koike, Shinsaku Sawa, Tadashi Akiyama
  • Patent number: 8681498
    Abstract: Disclosed is a member that contains electronic components. Using the member, when, for example, a vehicle or the like carrying electronic components such as an inverter collides with an external object, there is prevented damage to a housing containing the electronic components, which would otherwise occur due to interfering objects. Furthermore, the disclosed member can dissipate heat produced by the contained electronic components. The member includes a housing for containing electronic components, a cooling passage that is provided inside the housing and uses a refrigerant to cool the electronic components, and a heat dissipation part that dissipates heat from the cooling passage and prevents the housing from being damaged by impacts from external interfering objects.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: March 25, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tadashi Akiyama, Ray Mizutani
  • Publication number: 20130045044
    Abstract: A case-fixing structure includes a seat plate, a case located on the seat plate, a connecting member connected to the seat plate, a coupling member fixed to the connecting member and coupling the connecting member and the case, a buffer member disposed between the coupling member and the case, and a protruding part provided for the case. When a load heavier than specified is applied to the case, the protruding part can be brought into contact with at least one of the coupling member, the connecting member and the seat plate. When the protruding part is brought into contact with at least one of the coupling member, the connecting member and the seat plate, connection between the connecting member and the seat plate can be canceled.
    Type: Application
    Filed: April 28, 2010
    Publication date: February 21, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Tadashi Akiyama
  • Publication number: 20120317792
    Abstract: Provided is a method of manufacturing a loudspeaker including assembling a magnetic circuit and a frame. In the step of assembling the magnetic circuit and the frame, parallelism between a plate and a damper attachment portion of the frame is ensured by bringing an upper portion of the plate and the damper attachment portion of the frame into contact with a jig. In addition, perpendicularity between a magnetic gap and the damper attachment portion of the frame is ensured by bringing an outer circumferential side portion of the plate of the magnetic gap and an inner circumferential side portion of the yoke into contact with the jig. The magnetic circuit and the frame are assembled in such a state. With such a manufacturing method, it is possible to achieve a superior loudspeaker capable of reducing a gap defect while being downsized and having increased maximum input power.
    Type: Application
    Filed: March 30, 2011
    Publication date: December 20, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Toshiyuki Koike, Shinsaku Sawa, Tadashi Akiyama
  • Publication number: 20120320528
    Abstract: Disclosed is a member that contains electronic components. Using the member, when, for example, a vehicle or the like carrying electronic components such as an inverter collides with an external object, there is prevented damage to a housing containing the electronic components, which would otherwise occur due to interfering objects. Furthermore, the disclosed member can dissipate heat produced by the contained electronic components. The member includes a housing for containing electronic components, a cooling passage that is provided inside the housing and uses a refrigerant to cool the electronic components, and a heat dissipation part that dissipates heat from the cooling passage and prevents the housing from being damaged by impacts from external interfering objects.
    Type: Application
    Filed: March 22, 2011
    Publication date: December 20, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tadashi Akiyama, Ray Mizutani
  • Patent number: 7980204
    Abstract: A reserve tank includes a tank body for storing coolant, an inflow portion for allowing the coolant to flow into the tank body, a guide portion, and an outflow portion for allowing the coolant to flow out of the tank body. The guide portion is disposed above the inflow portion and below a liquid level of the coolant in the tank body. Furthermore, the guide portion is adapted to guide a flow of the coolant flowing thereinto from the inflow portion and directed upward, substantially in a horizontal direction or downward with respect to the horizontal direction. Therefore, the reserve tank can restrict air from being trapped in coolant.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: July 19, 2011
    Assignees: Denso Corporation, Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Okumura, Toshirou Matsubara, Hiroaki Nakano, Tadashi Akiyama, Yasuji Nishi, Shinji Miyawaki
  • Patent number: 7878231
    Abstract: The piping with a coolant inlet is provided with a partition wall within a body part. In the body part, a flow path having a U-turn region changing the flow direction of a coolant by about 180° degrees is defined. Much of the air contained in the coolant returning from a communicating hole to the body part floats up in a region leading to the U-turn region and is released from an inlet to the outside. By using this configuration, it is possible to provide a piping with a coolant inlet having a structure capable of efficiently releasing the air generated in a coolant circulation path.
    Type: Grant
    Filed: April 26, 2006
    Date of Patent: February 1, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tadashi Akiyama, Tomohiro Oono
  • Publication number: 20100224429
    Abstract: A hybrid vehicle is not provided with an alternator which is mounted in the conventional engine-powered vehicle because electric power is generated by a motor generator having the rotation shaft mechanically linked to the output shaft of an engine. A DC/DC converter is separated from a power control unit and disposed in the vacant space where the alternator which becomes unnecessary by disposing a motor generator has been supposed to be located.
    Type: Application
    Filed: December 18, 2006
    Publication date: September 9, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Tadashi Akiyama
  • Publication number: 20080289590
    Abstract: A reserve tank includes a tank body for storing coolant, an inflow portion for allowing the coolant to flow into the tank body, a guide portion, and an outflow portion for allowing the coolant to flow out of the tank body. The guide portion is disposed above the inflow portion and below a liquid level of the coolant in the tank body. Furthermore, the guide portion is adapted to guide a flow of the coolant flowing thereinto from the inflow portion and directed upward, substantially in a horizontal direction or downward with respect to the horizontal direction. Therefore, the reserve tank can restrict air from being trapped in coolant.
    Type: Application
    Filed: April 10, 2008
    Publication date: November 27, 2008
    Applicants: DENSO CORPORATION, Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Okumura, Toshirou Matsubara, Hiroaki Nakano, Tadashi Akiyama, Yasuji Nishi, Shinji Miyawaki
  • Patent number: 7350499
    Abstract: A control device for cylinder reducing operation of a multi-cylinder engine for a vehicle controls the number of working cylinders in the engine more appropriately for fuel economy while ensuring the operational stability of the engine and comfortable drivability of the vehicle. The control device comprises a detector detecting engine output torque and judges if cylinder reducing operation is to be executed while referring to the engine output torque. Because of the detection of engine output torque, cylinder reducing operation will be executed as long as torque requested of the engine is available from the reduced number of working cylinders, thereby ensuring the generation of torque required in operating the engine while saving fuel as much as possible. Through a learning process, criteria for the judgment of execution of cylinder reducing operation are modified to be adapted for any variation of engine output performances.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: April 1, 2008
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Toshifumi Takaoka, Tadashi Akiyama, Takashi Suzuki, Toshio Inoue
  • Publication number: 20070042861
    Abstract: A control device for cylinder reducing operation of a multi-cylinder engine for a vehicle controls the number of working cylinders in the engine more appropriately for fuel economy while ensuring the operational stability of the engine and comfortable drivability of the vehicle. The control device comprises a detector detecting engine output torque and judges if cylinder reducing operation is to be executed while referring to the engine output torque. Because of the detection of engine output torque, cylinder reducing operation will be executed as long as torque requested of the engine is available from the reduced number of working cylinders, thereby ensuring the generation of torque required in operating the engine while saving fuel as much as possible. Through a learning process, criteria for the judgment of execution of cylinder reducing operation are modified to be adapted for any variation of engine output performances.
    Type: Application
    Filed: November 5, 2004
    Publication date: February 22, 2007
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toshifumi Takaoka, Tadashi Akiyama, Takashi Suzuki, Toshio Inoue
  • Publication number: 20070000638
    Abstract: The piping with a coolant inlet is provided with a partition wall within a body part. In the body part, a flow path having a U-turn region changing the flow direction of a coolant by about 180° degrees is defined. Much of the air contained in the coolant returning from a communicating hole to the body part floats up in a region leading to the U-turn region and is released from an inlet to the outside. By using this configuration, it is possible to provide a piping with a coolant inlet having a structure capable of efficiently releasing the air generated in a coolant circulation path.
    Type: Application
    Filed: April 26, 2006
    Publication date: January 4, 2007
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tadashi Akiyama, Tomohiro Oono
  • Patent number: 6041754
    Abstract: An idle intake control device provided with a backflow preventing means for preventing a backflow near an idle intake regulating valve and producing only a forward flow in order to prevent idle intake air containing combustion products from flowing back and being adhered to an idle intake regulating valve in an idle intake passageway for bypassing an intake regulating valve provided in an intake passageway of the engine.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: March 28, 2000
    Assignees: Nippon Soken, Inc., Toyota Jidoshi Kabushiki Kaisha
    Inventors: Katsuyuki Mori, Kiyohiko Watanabe, Yasuyuki Kawabe, Koichi Gomi, Takashi Fukunaga, Tadashi Akiyama
  • Patent number: 5689355
    Abstract: A repeater which is installed as measures for silent zones, which automatically compensates for a variation in a light loss caused by a difference in length among optical cables interconnecting a master device and a plurality of slave devices which are allocated and installed in an underground shopping center or the like. The master device and the slaves devices both have current detectors for detecting current values of O/E transducers which transduce received lights to electric signals. Based on the detected current values, gain control signals are applied to variable gain amplifiers to change their amplification factors so that the levels of output RF signals for transmission to a radio base station and a portable station have a prescribed value, thereby compensating for the variation in the light loss of the optical cables. The present invention greatly facilitates the installation of the repeater and additional installation of slave devices.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: November 18, 1997
    Assignees: Kokusai Electric Co., Ltd., NTT Mobile Communications Network Inc.
    Inventors: Yoichi Okubo, Michio Norichika, Takashi Yokote, Hiroshi Suzuki, Tadashi Akiyama, Jun Suganuma