Patents by Inventor Takahito Osada
Takahito Osada 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).
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Publication number: 20240102523Abstract: Provided is a disc brake including a brake caliper. The brake caliper has a first bridge part positioned on a first pin disposition part side and on which a sprue mark formed at the time of casting a caliper main body part is provided, and a second bridge part positioned on a second pin disposition part side. The brake caliper has a shape in which a moment of inertia of area of the caliper main body part on the first bridge part side is larger than a moment of inertia of area of the caliper main body part on the second bridge part side when the caliper main body part is divided by a straight line that bisects a line segment connecting a center of the first pin disposition part and a center of the second pin disposition part when viewed from an axial direction of a disc.Type: ApplicationFiled: December 9, 2021Publication date: March 28, 2024Inventors: Takahito OSADA, Kimiyasu KONO
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Publication number: 20220056972Abstract: A disc brake including: a piston; a cylinder including a bore portion, which movably accommodates the piston, and a step portion formed on an opening end side of the bore portion; and a piston boot arranged between a tip side of the piston and a small diameter step portion of the cylinder. The piston boot includes: a large diameter annular fitting portion containing an annular metal member so as to be fitted to the small diameter step portion; a bellows portion, which extends from the large diameter fitting portion, is increased in its diameter from the large diameter fitting portion to an outer peripheral side, and is also deformed and extended from the large diameter fitting portion toward an inner peripheral side; and a small diameter fitting portion formed at an end portion of the bellows portion so as to fit to an outer periphery of the piston.Type: ApplicationFiled: December 2, 2019Publication date: February 24, 2022Inventors: Takahito OSADA, Shigeru HAYASHI, Shinya WATANABE
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Publication number: 20220049748Abstract: Protruding portions protruding in a direction of approaching a disc rotor are integrally formed in a locking plate portion of a pad spring. Moreover, an insulating resin coating is formed on a front surface side (surface in a region opposed to an outer peripheral surface of the disc rotor) of the locking plate portion. The coating film formed on the front surface of the locking plate portion flows downward by its own weight before the coating material is solidified. As a result, the coating film formed on bottom surfaces (front surfaces of protrusions) of the protruding portions is thinner in film thickness than that of the coating film in other region.Type: ApplicationFiled: December 2, 2019Publication date: February 17, 2022Inventors: Takahito OSADA, Shigeru HAYASHI, Yorihito MIURA, Yusuke SHIGETA, Masahiko KAMESAWA
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Publication number: 20210285508Abstract: A disk brake includes a cylinder including a bottomed bore portion in which a piston is received movably in an axial direction. The cylinder includes an annular small-diameter stepped portion formed on an opening edge side of the bore portion. The disk brake includes the piston configured to press a friction pad against a disk, and a piston boot disposed between a distal end side of the piston and the small-diameter stepped portion. The piston boot includes a large-diameter fitted portion configured to be fitted to the small-diameter stepped portion. An annular protrusion portion is provided on an inner peripheral side of the large-diameter fitted portion. The annular protrusion portion is shaped such that rigidity thereof against a force directed from the opening edge side toward a bottom portion side of the bore portion is lower than rigidity thereof against a force directed from the bottom portion side.Type: ApplicationFiled: June 14, 2019Publication date: September 16, 2021Inventors: Takahito OSADA, Shigeru HAYASHI, Satoshi NAKAMURA
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Patent number: 10801568Abstract: A disk brake includes a caliper, an inner pad and an outer pad that press a disk, a piston pressing the inner pad, and a claw portion pressing the outer pad. The inner pad includes a first surface that contacts the disk when the inner pad presses the disk and a second surface opposite to the first surface. The second surface has a first hole. The outer pad includes a third surface that contacts the disk when the outer pad presses the disk and a fourth surface opposite to the third surface. The fourth surface has a second hole. The first hole and the second hole are disposed so that, when the inner pad is projected onto the outer pad in the axial direction of the disk, the gravity center of the first hole and the gravity center of the second hole are offset relative to each other.Type: GrantFiled: June 21, 2016Date of Patent: October 13, 2020Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Takahito Osada, Yoshihiro Nakamura
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Publication number: 20180195568Abstract: A disk brake includes a caliper, an inner pad and an outer pad that press a disk, a piston pressing the inner pad, and a claw portion pressing the outer pad. The inner pad includes a first surface that contacts the disk when the inner pad presses the disk and a second surface opposite to the first surface. The second surface has a first hole. The outer pad includes a third surface that contacts the disk when the outer pad presses the disk and a fourth surface opposite to the third surface. The fourth surface has a second hole. The first hole and the second hole are disposed so that, when the inner pad is projected onto the outer pad in the axial direction of the disk, the gravity center of the first hole and the gravity center of the second hole are offset relative to each other.Type: ApplicationFiled: June 21, 2016Publication date: July 12, 2018Inventors: Takahito OSADA, Yoshihiro NAKAMURA
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Patent number: 9664244Abstract: A pad includes: a lining; a plate; a first shim installed at a surface of the plate which is opposite to the lining; and a second shim installed at a surface of the first shim which is opposite to the plate, a first hook overhanging at an outer circumferential edge section of the plate and hooked to the outer circumferential edge section of the plate is formed at the first shim, a second hook is formed at the second shim at an outer side of the first hook in a disk radial direction, and the second hook is configured to be hooked to a part of the plate with which the first hook does not come in contact.Type: GrantFiled: June 4, 2015Date of Patent: May 30, 2017Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventor: Takahito Osada
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Patent number: 9450264Abstract: A vehicle-mounted cell stack system includes a cell stack that comprises a plurality of laminated power generating cells, and power collecting plates that sandwich both outermost power generating cells, electric wires connected to the power collecting plates, and an electric load connected to the power collecting plates via the electric wires and configured to be activated by electric power that is supplied from the cell stack. The electric wires are connected to the power collecting plates in a direction other than a cell laminating direction.Type: GrantFiled: March 12, 2013Date of Patent: September 20, 2016Assignee: Nissan Motor Co., Ltd.Inventors: Takahito Osada, Shoichi Nakamura, Naoko Abe, Mitsutaka Abe
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Publication number: 20150354646Abstract: A pad includes: a lining; a plate; a first shim installed at a surface of the plate which is opposite to the lining; and a second shim installed at a surface of the first shim which is opposite to the plate, a first hook overhanging at an outer circumferential edge section of the plate and hooked to the outer circumferential edge section of the plate is formed at the first shim, a second hook is formed at the second shim at an outer side of the first hook in a disk radial direction, and the second hook is configured to be hooked to a part of the plate with which the first hook does not come in contact.Type: ApplicationFiled: June 4, 2015Publication date: December 10, 2015Inventor: Takahito OSADA
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Publication number: 20150037702Abstract: A vehicle-mounted cell stack system includes a cell stack that comprises a plurality of laminated power generating cells, and power collecting plates that sandwich both outermost power generating cells, electric wires connected to the power collecting plates, and an electric load connected to the power collecting plates via the electric wires and configured to be activated by electric power that is supplied from the cell stack. The electric wires are connected to the power collecting plates in a direction other than a cell laminating direction.Type: ApplicationFiled: March 12, 2013Publication date: February 5, 2015Inventors: Takahito Osada, Shoichi Nakamura, Naoko Abe, Mitsutaka Abe
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Patent number: 8808937Abstract: A system includes a radiator side flow path for supplying a coolant which has cooled a fuel cell stack to a radiator, a bypass flow path for allowing the coolant which has cooled the fuel cell stack to bypass the radiator, a thermostat valve for increasing a flow rate of the coolant flowing through the radiator side flow path in a case where the temperature of the coolant is high as compared to a case where the temperature of the coolant is low, and an electric heater for warming up the coolant. The electric heater is controlled based on an outside atmospheric pressure and on the temperature of the coolant such that the temperature of the coolant flowing into the fuel cell stack is raised in a case where the outside atmospheric pressure is high as compared to a case where the outside atmospheric pressure is low.Type: GrantFiled: June 4, 2009Date of Patent: August 19, 2014Assignee: Nissan Motor Co., Ltd.Inventors: Shinichiro Takemoto, Keisuke Wakabayashi, Takahito Osada
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Publication number: 20130137003Abstract: A fuel cell system is provided with a fuel cell, a gas supply passage which supplies a reaction gas to the fuel cell, a humidifier which humidifies the reaction gas, a first gas discharge passage which leads from a first gas discharge outlet of the fuel cell through the humidifier to the outside, and a second gas discharge flow passage which leads from a second gas discharge outlet of the fuel cell to the outside. A flow rate control mechanism which controls the flow rate of discharge gas is provided in at least one of the first gas discharge passage and the second gas discharge passage. The configuration reduces the distance between the fuel cell and the humidifier to obtain a compact system structure.Type: ApplicationFiled: June 21, 2011Publication date: May 30, 2013Applicant: NISSAN MOTOR CO., LTD.Inventors: Takahito Osada, Keigo Ikezoe, Hayato Chikugo
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Patent number: 8394546Abstract: A fuel cell system having a fuel cell for causing reactant gas to be electrochemically reacted to generate power, a reactant gas supply path for supplying reactant gas to the fuel cell, a reactant gas recirculation path for recirculating exhaust gas discharged from the fuel cell and combining the recirculating exhaust gas with reactant gas flowing through the reactant gas supply path to the fuel cell, and a pump unit disposed in the reactant gas recirculation path to pump the recirculating exhaust gas through the reactant gas recirculation path. A pump-tempering apparatus increases the temperature of the pump unit and a controller controls the pump-tempering apparatus. After the controller receives a fuel cell system stop signal, the controller controls the pump-tempering apparatus such that the temperature of the pump unit becomes higher than the temperature of piping in the reactant gas recirculation path.Type: GrantFiled: December 19, 2008Date of Patent: March 12, 2013Assignee: Nissan Motor Co., Ltd.Inventors: Hidetaka Nishimura, Takahito Osada, Takatada Usami, Ken Nakayama, Kotaro Akashi
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Patent number: 8173320Abstract: A fuel cell stack includes a membrane electrode assembly including an electrolyte membrane and electrode catalyst layers sandwiching the electrolyte membrane; metal separators that define gas channels, the metal separators being respectively disposed at both surfaces of the membrane electrode assembly; a current collector from which electromotive force is derived, the current collector being in contact with at least one of the metal separators; and joining parts that join the metal separator to the current collector at portions where the metal separator contacts the current collector.Type: GrantFiled: May 15, 2007Date of Patent: May 8, 2012Assignee: Nissan Motor Co., Ltd.Inventors: Koshi Takata, Takahito Osada, Atsushi Miyazawa, Motoharu Obika, Motoki Yaginuma
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Publication number: 20110159393Abstract: A system includes a radiator side flow path (9) for supplying a coolant which has cooled a fuel cell stack (1) to a radiator (5), a bypass flow path (7) for allowing the coolant which has cooled the fuel cell stack (1) to bypass the radiator (5), a thermostat valve (8) for increasing a flow rate of the coolant flowing through the radiator side flow path (9) in a case where the temperature of the coolant is high as compared to a case where the temperature of the coolant is low, and an electric heater (10) for warming up the coolant. The electric heater (10) is controlled based on an outside atmospheric pressure and on the temperature of the coolant such that the temperature of the coolant flowing into the fuel cell stack (1) is raised in a case where the outside atmospheric pressure is high as compared to a case where the outside atmospheric pressure is low.Type: ApplicationFiled: June 4, 2009Publication date: June 30, 2011Inventors: Shinichiro Takemoto, Keisuke Wakabayashi, Takahito Osada
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Publication number: 20090169928Abstract: A fuel cell system having a fuel cell for causing reactant gas to be electrochemically reacted to generate power, a reactant gas supply path for supplying reactant gas to the fuel cell, a reactant gas recirculation path for recirculating exhaust gas discharged from the fuel cell and combining the recirculating exhaust gas with reactant gas flowing through the reactant gas supply path to the fuel cell, and a pump unit disposed in the reactant gas recirculation path to pump the recirculating exhaust gas through the reactant gas recirculation path. A pump-tempering apparatus increases the temperature of the pump unit and a controller controls the pump-tempering apparatus. After the controller receives a fuel cell system stop signal, the controller controls the pump-tempering apparatus such that the temperature of the pump unit becomes higher than the temperature of piping in the reactant gas recirculation path.Type: ApplicationFiled: December 19, 2008Publication date: July 2, 2009Applicant: NISSAN MOTOR CO., LTD.Inventors: Hidetaka NISHIMURA, Takahito Osada, Takatada Usami, Ken Nakayama, Kotaro Akashi
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Publication number: 20090053571Abstract: A fuel cell stack includes a membrane electrode assembly including an electrolyte membrane and electrode catalyst layers sandwiching the electrolyte membrane; metal separators that define gas channels, the metal separators being respectively disposed at both surfaces of the membrane electrode assembly; a current collector from which electromotive force is derived, the current collector being in contact with at least one of the metal separators; and joining parts that join the metal separator to the current collector at portions where the metal separator contacts the current collector.Type: ApplicationFiled: May 15, 2007Publication date: February 26, 2009Applicant: NISSAN MOTOR CO., LTD.Inventors: Koshi Takata, Takahito Osada, Atsushi Miyazawa, Motoharu Obika, Motoki Yaginuma