Patents by Inventor Osamu Hakamata

Osamu Hakamata 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: 20220065157
    Abstract: A reserve tank includes a vapor-liquid separator, an inlet portion, an outlet portion, and a protrusion. The vapor-liquid separator defines an inner space for separating a vapor phase and a liquid phase of a cooling water. The inlet portion defines a first opening through which the cooling water is supplied into the inner space and the outlet portion defines a second opening through which the cooling water is discharged from the inner space. The protrusion protrudes upward from a bottom surface of the vapor-liquid separator. An inner circumferential surface of the vapor-liquid separator and an outer circumferential surface of the protrusion are coaxially provided to define an annular passage in the inner space. The cooling water introduced from the first opening flows spirally in the annular passage.
    Type: Application
    Filed: November 10, 2021
    Publication date: March 3, 2022
    Inventors: Masashi MIYAGAWA, Akira YAMANAKA, Osamu HAKAMATA
  • Patent number: 11162743
    Abstract: The heat exchanger has tubes and a header tank that is located at an end of the tubes in a longitudinal direction and communicates with the tubes. The header tank has a core plate that connects to the tubes and a tank body that is fixed to the core plate. The core plate has a tube connection surface, a sealing surface, and an inclined surface that connects the tube connection surface and the sealing surface with each other. A distance between the tube connection surface and an end surface of the tubes in the longitudinal direction is different from a distance between the sealing surface and the end surface in the longitudinal direction by disposing the inclined surface to incline with respect to the longitudinal direction. The tubes connect to the tube connection surface and the inclined surface in a condition of being inserted to the tube connection surface and the inclined surface.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: November 2, 2021
    Assignee: DENSO CORPORATION
    Inventors: Osamu Hakamata, Tatsuo Ozaki, Shinta Mabuchi
  • Patent number: 11143463
    Abstract: A stiffener for a heat exchanger includes a top plate and at least two legs extending from opposing sides of the top plate. Each of the at least two legs includes a bent portion, an angled portion, and a straight portion. The bent portion attaches the leg to the top plate. The angled portion increases a width of the stiffener from a width of the top plate. The straight portion extends perpendicular to a plane of the top plate.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: October 12, 2021
    Assignees: DENSO International America, Inc., DENSO CORPORATION
    Inventors: Guriqbal Singh, Jason Spenny, Osamu Hakamata
  • Patent number: 10837707
    Abstract: A side slit of a core plate of a heat exchanger reaches a sealing surface. The core plate has a rib which is formed on a bottom plate across a protruding portion. The rib communicates to a cavity above the sealing surface. An end slit formed on an end wall of the core plate reaches the sealing surface. A first joining tab is formed between two end slits. The first joining tab is joined to a second joining tab on a reinforce plate. The side slit and the rib enable deformation of the core plate. The end slit enables deformation of the first joining tab in a tilting manner.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: November 17, 2020
    Assignee: DENSO CORPORATION
    Inventors: Osamu Hakamata, Steven Maloney, Masaya Nakamura
  • Patent number: 10598444
    Abstract: A heat exchanger has a core plate connected to a tank member by clamping claws. The tank member has a waved outer surface including outer ridge portions and outer valley portions which are disposed alternately. The tank member also has a waved inner surface including inner ridge portions and inner valley portions which are disposed alternately. The outer valley portions are capable of receiving the claws. The inner ridge portion is positioned inside the outer valley portion in a width direction. The inner ridge portion is positioned between the adjacent tubes and/or between extensions of the tubes in a height direction. An inner width of the tank member regulated by the inner ridge portions is narrower than a width of the tube.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: March 24, 2020
    Assignees: DENSO CORPORATION, DENSO THERMAL SYSTEMS S.P.A.
    Inventors: Shinta Mabuchi, Hajime Sugito, Osamu Hakamata, Marta Roberti, Giuseppe Tiziano
  • Publication number: 20190249936
    Abstract: The heat exchanger has tubes and a header tank that is located at an end of the tubes in a longitudinal direction and communicates with the tubes. The header tank has a core plate that connects to the tubes and a tank body that is fixed to the core plate. The core plate has a tube connection surface, a sealing surface, and an inclined surface that connects the tube connection surface and the sealing surface with each other. A distance between the tube connection surface and an end surface of the tubes in the longitudinal direction is different from a distance between the sealing surface and the end surface in the longitudinal direction by disposing the inclined surface to incline with respect to the longitudinal direction. The tubes connect to the tube connection surface and the inclined surface in a condition of being inserted to the tube connection surface and the inclined surface.
    Type: Application
    Filed: April 25, 2019
    Publication date: August 15, 2019
    Inventors: Osamu HAKAMATA, Tatsuo OZAKI, Shinta MABUCHI
  • Patent number: 10369665
    Abstract: This brazed structure includes a brazing sheet that has been brazed and that comprises: a core material comprising an aluminum alloy which contains 0.3-1.0 mass %, excluding 0.3 mass %, Si, 0.6-2.0 mass %, excluding 0.6 mass %, Mn, 0.3-1.0 mass %, excluding 0.3 mass %, Cu, and 0.15-0.5 mass %, excluding 0.15 mass %, Mg, with the remainder comprising Al and unavoidable impurities, and has an average crystal grain diameter of 50 ?m or larger and in which an Mg—Si intermetallic compound and an Al—Mg—Si—Cu intermetallic compound account for 40% or less of the grain boundaries; and, clad to the core material, a brazing material comprising an Al—Si alloy.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: August 6, 2019
    Assignees: KOBE STEEL, LTD., DENSO CORPORATION
    Inventors: Takahiro Izumi, Shimpei Kimura, Yuji Shibuya, Shoei Teshima, Hayaki Teramoto, Osamu Hakamata
  • Patent number: 10317148
    Abstract: The heat exchanger has tubes and a header tank that is located at an end of the tubes in a longitudinal direction and communicates with the tubes. The header tank has a core plate that connects to the tubes and a tank body that is fixed to the core plate. The core plate has a tube connection surface, a sealing surface, and an inclined surface that connects the tube connection surface and the sealing surface with each other. A distance between the tube connection surface and an end surface of the tubes in the longitudinal direction is different from a distance between the sealing surface and the end surface in the longitudinal direction by disposing the inclined surface to incline with respect to the longitudinal direction. The tubes connect to the tube connection surface and the inclined surface in a condition of being inserted to the tube connection surface and the inclined surface.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: June 11, 2019
    Assignee: DENSO CORPORATION
    Inventors: Osamu Hakamata, Tatsuo Ozaki, Shinta Mabuchi
  • Publication number: 20190137184
    Abstract: A side slit of a core plate of a heat exchanger reaches a sealing surface. The core plate has a rib which is formed on a bottom plate across a protruding portion. The rib communicates to a cavity above the sealing surface. An end slit formed on an end wall of the core plate reaches the sealing surface. A first joining tab is formed between two end slits. The first joining tab is joined to a second joining tab on a reinforce plate. The side slit and the rib enable deformation of the core plate. The end slit enables deformation of the first joining tab in a tilting manner.
    Type: Application
    Filed: March 6, 2017
    Publication date: May 9, 2019
    Inventors: Osamu HAKAMATA, Steven MALONEY, Masaya NAKAMURA
  • Publication number: 20190072341
    Abstract: A stiffener for a heat exchanger includes a top plate and at least two legs extending from opposing sides of the top plate. Each of the at least two legs includes a bent portion, an angled portion, and a straight portion. The bent portion attaches the leg to the top plate. The angled portion increases a width of the stiffener from a width of the top plate. The straight portion extends perpendicular to a plane of the top plate.
    Type: Application
    Filed: July 3, 2018
    Publication date: March 7, 2019
    Inventors: Guriqbal SINGH, Jason SPENNY, Osamu HAKAMATA
  • Patent number: 9751143
    Abstract: An aluminum alloy brazing sheet for heat exchangers has a core, a sacrificial material formed on one side of the core, and a brazing filler metal formed on the other side of the core. The core is made of an aluminum alloy containing Si, Cu, Mn, and Al. The sacrificial material is made of an aluminum alloy containing Si, Zn, Mg, and Al. The brazing filler metal is made of an aluminum alloy. The aluminum alloy brazing sheet for heat exchangers has a work hardening exponent n of not less than 0.05. The core has an average crystal grain size of not more than 10 ?m in a cross-section. The aluminum alloy brazing sheet for heat exchangers has excellent strength and corrosion resistance even when it is formed into a thin material and also has excellent high frequency weldability and weld cracking resistance during electric resistance welding.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: September 5, 2017
    Assignees: KOBE STEEL, LTD., DENSO CORPORATION
    Inventors: Shimpei Kimura, Toshiki Ueda, Takahiro Izumi, Haruyuki Konishi, Hayaki Teramoto, Osamu Hakamata, Michiyasu Yamamoto
  • Patent number: 9696099
    Abstract: A heat exchanger includes a core portion, a pair of header tanks, and an elastically-deformable sealing member. The header tanks are arranged on both end sides of the core portion. The header tank includes a core plate and a resin tank body, which define a tank space. The sealing member is disposed at an end part of the tank body located adjacent to the core plate. The sealing member has a loop shape to enclose the tank space when viewed from the core portion and is formed integrally with the end part of the tank body. The end part of the tank body includes a protrusion portion at least one of inward and outward of the sealing member. The protrusion portion encloses the tank space when viewed from the core portion and projects from the end part of the tank body toward the core plate.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: July 4, 2017
    Assignee: DENSO CORPORATION
    Inventors: Osamu Hakamata, Yoshinori Ishihara, Hirotaka Ishikawa
  • Publication number: 20170038163
    Abstract: The heat exchanger has tubes and a header tank that is located at an end of the tubes in a longitudinal direction and communicates with the tubes. The header tank has a core plate that connects to the tubes and a tank body that is fixed to the core plate. The core plate has a tube connection surface, a sealing surface, and an inclined surface that connects the tube connection surface and the sealing surface with each other. A distance between the tube connection surface and an end surface of the tubes in the longitudinal direction is different from a distance between the sealing surface and the end surface in the longitudinal direction by disposing the inclined surface to incline with respect to the longitudinal direction. The tubes connect to the tube connection surface and the inclined surface in a condition of being inserted to the tube connection surface and the inclined surface.
    Type: Application
    Filed: November 19, 2014
    Publication date: February 9, 2017
    Inventors: Osamu HAKAMATA, Tatsuo OZAKI, Shinta MABUCHI
  • Publication number: 20160258693
    Abstract: A heat exchanger has a core plate connected to a tank member by clamping claws. The tank member has a waved outer surface including outer ridge portions and outer valley portions which are disposed alternately. The tank member also has a waved inner surface including inner ridge portions and inner valley portions which are disposed alternately. The outer valley portions are capable of receiving the claws. The inner ridge portion is positioned inside the outer valley portion in a width direction. The inner ridge portion is positioned between the adjacent tubes and/or between extensions of the tubes in a height direction. An inner width of the tank member regulated by the inner ridge portions is narrower than a width of the tube.
    Type: Application
    Filed: October 29, 2014
    Publication date: September 8, 2016
    Inventors: Shinta MABUCHI, Hajime SUGITO, Osamu HAKAMATA, Marta ROBERTI, Giuseppe TIZIANO
  • Publication number: 20160238329
    Abstract: In a heat exchanger for a vehicle, a cover member covers an upstream side end that is a part of an outer peripheral surface of a tube in which a heat medium flows, on the upstream side of the air flow. Further, the cover member is fixed to the upstream side end of the tube. For example, a width of the cover member is equal to or less than that of the tube in a direction perpendicular to the air flow direction and a flow direction of the heat medium. Thus, the heat exchanger can prevent the misalignment of the cover member with respect to the tube, thereby protecting the tube by the cover member at the front side of the vehicle. Therefore, the tube can be protected from chipping.
    Type: Application
    Filed: September 17, 2014
    Publication date: August 18, 2016
    Inventors: Masashi UTSUNOMIYA, Osamu HAKAMATA
  • Publication number: 20160031045
    Abstract: This brazed structure includes a brazing sheet that has been brazed and that comprises: a core material comprising an aluminum alloy which contains 0.3-1.0 mass %, excluding 0.3 mass %, Si, 0.6-2.0 mass %, excluding 0.6 mass %, Mn, 0.3-1.0 mass %, excluding 0.3 mass %, Cu, and 0.15-0.5 mass %, excluding 0.15 mass %, Mg, with the remainder comprising Al and unavoidable impurities, and has an average crystal grain diameter of 50 ?m or larger and in which an Mg—Si intermetallic compound and an Al—Mg—Si—Cu intermetallic compound account for 40% or less of the grain boundaries; and, clad to the core material, a brazing material comprising an Al—Si alloy.
    Type: Application
    Filed: March 24, 2014
    Publication date: February 4, 2016
    Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD,), DENSO CORPORATION
    Inventors: Takahiro IZUMI, Shimpei KIMURA, Yuji SHIBUYA, Shoei TESHIMA, Hayaki TERAMOTO, Osamu HAKAMATA
  • Patent number: 8997912
    Abstract: Disclosed is an electric motorcycle provided with: an electric motor (M) for driving a rear wheel (110) which is a drive wheel; a battery (B) for supplying power to the electric motor (M); and a controller unit (130) for performing drive control of the electric motor (M). The electric motorcycle is of the scooter type in which a footrest section is constructed between the front wheel (105) and the rear wheel (110), and is provided with a controller housing compartment (129) disposed in the footrest section so as to be downwardly recessed. An opening (131) is formed in the bottom of the controller housing compartment (129), and a cooling fin (130c) is provided in the bottom surface of the controller unit (130) in a state in which the cooling fin (130c) is housed in the controller housing compartment (129) and downwardly protrudes from the opening (131) to face the outside. As a result, the controller unit (130) is directly and efficiently cooled by airflow produced during travel.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: April 7, 2015
    Assignee: Suzuki Motor Corporation
    Inventors: Osamu Hakamata, Akinori Honma, Kazuhiro Iida, Takeshi Nagao
  • Publication number: 20130260175
    Abstract: An aluminum alloy brazing sheet for heat exchangers has a core, a sacrificial material formed on one side of the core, and a brazing filler metal formed on the other side of the core. The core is made of an aluminum alloy containing Si, Cu, Mn, and Al. The sacrificial material is made of an aluminum alloy containing Si, Zn, Mg, and Al. The brazing filler metal is made of an aluminum alloy. The aluminum alloy brazing sheet for heat exchangers has a work hardening exponent n of not less than 0.05. The core has an average crystal grain size of not more than 10 ?m in a cross-section. The aluminum alloy brazing sheet for heat exchangers has excellent strength and corrosion resistance even when it is formed into a thin material and also has excellent high frequency weldability and weld cracking resistance during electric resistance welding.
    Type: Application
    Filed: March 12, 2013
    Publication date: October 3, 2013
    Applicants: DENSO CORPORATION, KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Shimpei KIMURA, Toshiki Ueda, Takahiro Izumi, Haruyuki Konishi, Hayaki Teramoto, Osamu Hakamata, Michiyasu Yamamoto
  • Publication number: 20120325449
    Abstract: A liquid silicone resin composition as a gasket material comprising a base resin, a first crosslinking agent for causing a crosslinking reaction of the base resin, a silane coupling agent, a second crosslinking agent for forming a bond to the silane coupling agent, and a silica filler is used to form a gasket in a heat exchanger. Using this liquid silicone composition, the adhesiveness of the gasket can be enhanced while ensuring the sealing reliability of the gasket compared with conventional gaskets. Even when a resin which is difficult to adhere a silicon resin is used as a material of the tank body, the adhesive force of the gasket to the tank body can be sufficiently increased.
    Type: Application
    Filed: June 21, 2012
    Publication date: December 27, 2012
    Applicant: DENSO CORPORATION
    Inventors: Shinichi Okamoto, Arata Iida, Osamu Hakamata
  • Publication number: 20120318600
    Abstract: Disclosed is an electric motorcycle provided with: an electric motor (M) for driving a rear wheel (110) which is a drive wheel; a battery (B) for supplying power to the electric motor (M); and a controller unit (130) for performing drive control of the electric motor (M). The electric motorcycle is of the scooter type in which a footrest section is constructed between the front wheel (105) and the rear wheel (110), and is provided with a controller housing compartment (129) disposed in the footrest section so as to be downwardly recessed. An opening (131) is formed in the bottom of the controller housing compartment (129), and a cooling fin (130c) is provided in the bottom surface of the controller unit (130) in a state in which the cooling fin (130c) is housed in the controller housing compartment (129) and downwardly protrudes from the opening (131) to face the outside. As a result, the controller unit (130) is directly and efficiently cooled by airflow produced during travel.
    Type: Application
    Filed: January 25, 2011
    Publication date: December 20, 2012
    Applicant: SUZUKI MOTOR CORPORATION
    Inventors: Osamu Hakamata, Akinori Honma, Kazuhiro Iida, Takeshi Nagao