Patents by Inventor Yoshiyuki Takamatsu
Yoshiyuki Takamatsu 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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Patent number: 9726285Abstract: Provided is a piston push rod assembly which can prevent discomfort from being imparted during the operation of a brake pedal by a driver. A piston push rod assembly, wherein: a second piston is provided with a piston slide section which is housed in a cylinder and which slides relative to the cylinder, and a connection tube section which is connected to a push rod; the piston slide section is covered by metal plating; the connection tube section has a non-plated section; and the second piston and the push rod are connected by the caulking of the connection tube section when the push rod has been inserted inside the connection tube section.Type: GrantFiled: March 29, 2013Date of Patent: August 8, 2017Assignees: Honda Motor Co., Ltd., Autoliv Nissin Brake Systems Japan Co., Ltd.Inventors: Kazuaki Murayama, Jiro Suzuki, Takaaki Ohnishi, Motoyasu Nakamura, Yoshiyuki Takamatsu, Kazuhiro Tagata
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Patent number: 9637101Abstract: A cylinder device includes a regulation mechanism that regulates separation distance between a front piston and a rear piston. A spring seat member of the regulation mechanism includes a spring reception part that projects toward a retainer side to receive a rear end of a spring, a cup seal holding part that projects on an opposite side from the retainer to hold a cup seal arranged on the rear piston, and a projection part that projects on the opposite side from the retainer. The projection part becomes abuttable on the retainer by a stroke of the rear piston if the spring reception part and the cup seal holding part are installed reversely-oriented on the rear piston.Type: GrantFiled: September 29, 2015Date of Patent: May 2, 2017Assignees: Autoliv Nissin Brake Systems Japan Co., Ltd., Honda Motor Co., Ltd.Inventors: Kazuhiro Tagata, Nobuyuki Kobayashi, Motoyasu Nakamura, Yoshiyuki Takamatsu, Hideki Hidume, Kazuaki Murayama, Nobutake Hyodo
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Patent number: 9545905Abstract: An electric brake device includes a first slave piston which is housed in a cylinder body and generates hydraulic pressure in a first hydraulic chamber by moving forward, a motor which transmits a driving force to the first slave piston, and a restriction pin which is inserted and secured to the cylinder body in a direction perpendicular to an axial direction of the cylinder body and restricts a backward position of the first slave piston when a hydraulic pressure is applied from an outside to the first hydraulic chamber, wherein the restriction pin is inserted and secured to the cylinder mechanism in the direction perpendicular to the axial direction of the cylinder main body. Further, a clearance is formed between an inner peripheral wall of the cylinder body and a first groove portion and second groove portion which are formed on an outer surface of the restriction pin.Type: GrantFiled: March 27, 2012Date of Patent: January 17, 2017Assignees: Honda Motor Co., Ltd., Autoliv Nissin Brake Systems Japan Co., Ltd.Inventors: Takaaki Ohnishi, Kazuaki Murayama, Hiroshi Nakano, Kazuyoshi Akutsu, Hideo Miyabayashi, Yoshiyuki Takamatsu, Nobuyuki Kobayashi, Motoyasu Nakamura, Yoshiteru Matsunaga
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Publication number: 20160090070Abstract: A cylinder device includes a regulation mechanism that regulates separation distance between a front piston and a rear piston. A spring seat member of the regulation mechanism includes a spring reception part that projects toward a retainer side to receive a rear end of a spring, a cup seal holding part that projects on an opposite side from the retainer to hold a cup seal arranged on the rear piston, and a projection part that projects on the opposite side from the retainer. The projection part becomes abuttable on the retainer by a stroke of the rear piston if the spring reception part and the cup seal holding part are installed reversely-oriented on the rear piston.Type: ApplicationFiled: September 29, 2015Publication date: March 31, 2016Inventors: Kazuhiro TAGATA, Nobuyuki KOBAYASHI, Motoyasu NAKAMURA, Yoshiyuki TAKAMATSU, Hideki HIDUME, Kazuaki MURAYAMA, Nobutake HYODO
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Patent number: 9062791Abstract: An electric connection structure of a solenoid valve drive assembly has a solenoid valve, a coil that drives the solenoid valve, and a housing in which the solenoid valve and the coil are located, so that a terminal of the coil and a terminal inside the housing are electrically connected to each other. In the electric connection structure, a coil urging part that urges the coil is provided between the housing and the coil, and the coil urging part has: a base portion to be attached to the housing, and an elastic portion that extends from the base portion to press the coil.Type: GrantFiled: May 22, 2012Date of Patent: June 23, 2015Assignee: NISSIN KOGYO CO., LTD.Inventors: Motoyasu Nakamura, Yoshiyuki Takamatsu, Takaaki Komaba
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Publication number: 20150075370Abstract: Provided is a piston push rod assembly which can prevent discomfort from being imparted during the operation of a brake pedal by a driver. A piston push rod assembly, wherein: a second piston is provided with a piston slide section which is housed in a cylinder and which slides relative to the cylinder, and a connection tube section which is connected to a push rod; the piston slide section is covered by metal plating; the connection tube section has a non-plated section; and the second piston and the push rod are connected by the caulking of the connection tube section when the push rod has been inserted inside the connection tube section.Type: ApplicationFiled: March 29, 2013Publication date: March 19, 2015Inventors: Kazuaki Murayama, Jiro Suzuki, Takaaki Ohnishi, Motoyasu Nakamura, Yoshiyuki Takamatsu, Kazuhiro Tagata
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Patent number: 8936230Abstract: A normally open electromagnetic valve includes: a fixed core; a movable core which is driven when excited; a valve seat member in the fixed core and having a funnel-shaped valve seat surface; a valve member disposed so that the valve member advances or retreats together with the movable core with one end of the valve member kept in contact with the movable core, and that the other end of the valve member closes or opens a flow passage by coming into contact with or separates from the valve seat surface; and a return spring. The fixed core has a cylindrical holding hole. The valve member advances or retreats being guided by the holding hole in sliding contact with the holding hole. The movable core has a projection which projects toward the fixed core and which is directly inserted into the holding hole.Type: GrantFiled: March 27, 2012Date of Patent: January 20, 2015Assignee: Nissin Kogyo Co., LtdInventors: Yoshiyuki Takamatsu, Tetsuo Sasaki
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Patent number: 8915338Abstract: The present invention provides an input device of a vehicle brake system, the input device being a separate unit from an electric brake actuator, the electric brake actuator for generating a first fluid pressure, the input device of the vehicle brake system comprising: a master cylinder for generating a second fluid pressure; a stroke simulator for applying a simulated reaction force, the stroke simulator and the master cylinder forming an attachment body, with the stroke simulator disposed in communication with the master cylinder; and a component storage box provided on the attachment body for a component of either one of the master cylinder and the stroke simulator, wherein the attachment body has a vent hole with a first end in communication with the component storage box and a second end in communication with a space formed before a surface of a dashboard having the input device mounted thereon.Type: GrantFiled: November 16, 2011Date of Patent: December 23, 2014Assignees: Honda Motor Co., Ltd., Nissin Kogyo Co., Ltd.Inventors: Kazuaki Murayama, Takaaki Ohnishi, Hideo Miyabayashi, Motoyasu Nakamura, Yoshiteru Matsunaga, Yoshiyuki Takamatsu, Nobuyuki Kobayashi
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Patent number: 8911030Abstract: An electric brake actuator (motor cylinder apparatus) for generating hydraulic brake pressure on the basis of at least an electric signal corresponding to brake manipulation by an operator, which is incorporated in a vehicle brake system with an input apparatus being arranged separately from the electric brake actuator and receiving the brake manipulation. A reservoir reserving brake fluid is attached to a cylinder body included in the electric brake actuator, and the ceiling of the reservoir is inclined from the axis of the cylinder body in correspondence with an arrangement of the main body inclined from the horizontal line.Type: GrantFiled: November 16, 2011Date of Patent: December 16, 2014Assignees: Honda Motor Co., Ltd., Nissin Kogyo Co., Ltd.Inventors: Takaaki Ohnishi, Kazuaki Murayama, Hideo Miyabayashi, Nobuyuki Kobayashi, Yoshiyuki Takamatsu, Motoyasu Nakamura, Yoshiteru Matsunaga
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Publication number: 20140026557Abstract: An electric brake device includes a first slave piston which is housed in a cylinder body and generates hydraulic pressure in a first hydraulic chamber by moving forward, a motor which transmits a driving force to the first slave piston, and a restriction pin which is inserted and secured to the cylinder body in a direction perpendicular to an axial direction of the cylinder body and restricts a backward position of the first slave piston when a hydraulic pressure is applied from an outside to the first hydraulic chamber, wherein the restriction pin is inserted and secured to the cylinder mechanism in the direction perpendicular to the axial direction of the cylinder main body. Further, a clearance is formed between an inner peripheral wall of the cylinder body and a first groove portion and second groove portion which are formed on an outer surface of the restriction pin.Type: ApplicationFiled: March 27, 2012Publication date: January 30, 2014Applicants: NISSIN KOGYO CO., LTD., HONDA MOTOR CO., LTD.Inventors: Takaaki Ohnishi, Kazuaki Murayama, Hiroshi Nakano, Kazuyoshi Akutsu, Hideo Miyabayashi, Yoshiyuki Takamatsu, Nobuyuki Kobayashi, Motoyasu Nakamura, Yoshiteru Matsunaga
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Publication number: 20120298897Abstract: An electric connection structure of a solenoid valve drive assembly has a solenoid valve, a coil that drives the solenoid valve, and a housing in which the solenoid valve and the coil are located, so that a terminal of the coil and a terminal inside the housing are electrically connected to each other. In the electric connection structure, a coil urging part that urges the coil is provided between the housing and the coil, and the coil urging part has: a base portion to be attached to the housing, and an elastic portion that extends from the base portion to press the coil.Type: ApplicationFiled: May 22, 2012Publication date: November 29, 2012Applicant: NISSIN KOGYO CO., LTD.Inventors: Motoyasu Nakamura, Yoshiyuki Takamatsu, Takaaki Komaba
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Publication number: 20120248354Abstract: A normally open electromagnetic valve includes: a fixed core; a movable core which is driven when excited; a valve seat member in the fixed core and having a funnel-shaped valve seat surface; a valve member disposed so that the valve member advances or retreats together with the movable core with one end of the valve member kept in contact with the movable core, and that the other end of the valve member closes or opens a flow passage by coming into contact with or separates from the valve seat surface; and a return spring. The fixed core has a cylindrical holding hole. The valve member advances or retreats being guided by the holding hole in sliding contact with the holding hole. The movable core has a projection which projects toward the fixed core and which is directly inserted into the holding hole.Type: ApplicationFiled: March 27, 2012Publication date: October 4, 2012Applicant: NISSIN KOGYO CO., LTD.Inventors: Yoshiyuki TAKAMATSU, Tetsuo SASAKI
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Patent number: 8182049Abstract: A controller includes an initial current value calculation unit calculating an initial current value to open a normally open linear solenoid valve when a hydraulic pressure is shifted from a pressure reducing state or a pressure holding state to a pressure increasing state, a valve opening amount increasing unit reducing the energization amount from the initial current value so that a valve opening amount of the normally open linear solenoid valve increases, an offsetting necessity determination unit determining based on a predetermined condition whether or not the energization amount needs to be offset to an increase side when the valve opening amount increasing unit reduces the energization amount, and an energization amount offsetting unit offsetting at least once the energization amount to an increase side only for a predetermined time period when it is determined that such offsetting is necessary.Type: GrantFiled: July 18, 2008Date of Patent: May 22, 2012Assignee: Nissin Kogyo Co., Ltd.Inventors: Takashi Kurosaki, Yoshiyuki Takamatsu, Keiichi Takaku
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Publication number: 20120118682Abstract: The present invention provides an input device of a vehicle brake system, the input device being a separate unit from an electric brake actuator, the electric brake actuator for generating a first fluid pressure, the input device of the vehicle brake system comprising: a master cylinder for generating a second fluid pressure; a stroke simulator for applying a simulated reaction force, the stroke simulator and the master cylinder forming an attachment body, with the stroke simulator disposed in communication with the master cylinder; and a component storage box provided on the attachment body for a component of either one of the master cylinder and the stroke simulator, wherein the attachment body has a vent hole with a first end in communication with the component storage box and a second end in communication with a space formed before a surface of a dashboard having the input device mounted thereon.Type: ApplicationFiled: November 16, 2011Publication date: May 17, 2012Applicants: NISSIN KOGYO CO., LTD., HONDA MOTOR CO., LTD.Inventors: Kazuaki MURAYAMA, Takaaki OHNISHI, Hideo MIYABAYASHI, Motoyasu NAKAMURA, Yoshiteru MATSUNAGA, Yoshiyuki TAKAMATSU, Nobuyuki KOBAYASHI
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Publication number: 20120119566Abstract: An electric brake actuator (motor cylinder apparatus) for generating hydraulic brake pressure on the basis of at least an electric signal corresponding to brake manipulation by an operator, which is incorporated in a vehicle brake system with an input apparatus being arranged separately from the electric brake actuator and receiving the brake manipulation. A reservoir reserving brake fluid is attached to a cylinder body included in the electric brake actuator, and the ceiling of the reservoir is inclined from the axis of the cylinder body in correspondence with an arrangement of the main body inclined from the horizontal line.Type: ApplicationFiled: November 16, 2011Publication date: May 17, 2012Applicants: NISSIN KOGYO CO., LTD., HONDA MOTOR CO., LTD.Inventors: Takaaki OHNISHI, Kazuaki MURAYAMA, Hideo MIYABAYASHI, Nobuyuki KOBAYASHI, Yoshiyuki TAKAMATSU, Motoyasu NAKAMURA, Yoshiteru MATSUNAGA
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Publication number: 20090025383Abstract: A controller 20 includes an initial current value calculation unit 22 calculating an initial current value to open a normally open linear solenoid valve when a hydraulic pressure is shifted from a pressure reducing state or a pressure holding state to a pressure increasing state, a valve opening amount increasing unit 23 reducing the energization amount from the initial current value so that a valve opening amount of the normally open linear solenoid valve increases, an offsetting necessity determination unit 24 determining based on a predetermined condition whether or not the energization amount needs to be offset to an increase side when the valve opening amount increasing unit 23 reduces the energization amount, and an energization amount offsetting unit 25 offsetting at least once the energization amount to an increase side only for a predetermined time period when it is determined that such offsetting is necessary.Type: ApplicationFiled: July 18, 2008Publication date: January 29, 2009Applicant: NISSIN KOGYO CO., LTD.Inventors: Takashi KUROSAKI, Yoshiyuki Takamatsu, Keiichi Takaku
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Patent number: 7168679Abstract: An electromagnetic valve comprising has a valve seat, a valve element movable relative to the valve seat so as to open or close a hydraulic fluid passage interposed therebetween and a plunger movable together with the valve element relative to the valve seat, wherein the valve element includes a sealing portion having an arc-shaped vertical cross section that contacts with the valve seat and an expanding diameter portion having a diameter gradually increasing in a direction from the sealing portion toward the plunger.Type: GrantFiled: June 2, 2004Date of Patent: January 30, 2007Assignee: Nissin Kogyo Co., Ltd.Inventors: Takaomi Shirase, Yoshiyuki Takamatsu, Masaya Shigeta
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Publication number: 20050001190Abstract: An electromagnetic valve comprising has a valve seat, a valve element movable relative to the valve seat so as to open or close a hydraulic fluid passage interposed therebetween and a plunger movable together with the valve element relative to the valve seat, wherein the valve element includes a sealing portion having an arc-shaped vertical cross section that contacts with the valve seat and an expanding diameter portion having a diameter gradually increasing in a direction from the sealing portion toward the plunger.Type: ApplicationFiled: June 2, 2004Publication date: January 6, 2005Inventors: Takaomi Shirase, Yoshiyuki Takamatsu, Masaya Shigeta
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Publication number: 20050001189Abstract: A normally open solenoid valve, includes: a coil; a fixed core that is excited when the coil is energized, the fixed core having a through hole and an opening formed at an end of the throughhole; a valve seat disposed at the opening; a valve element inserted through the through hole, the valve element including a valve part for coming into contact with the valve seat and a roughly columnar shaft part extending from the valve part; and a movable core that pushes and moves the valve element. The shaft part has a plurality of sliding portions that are slidable on the inner surface of the through hole and are formed to be spaced in an axial direction of the shaft part and a narrowed portion having an outer diameter smaller than the sliding portions between the plurality of sliding portions.Type: ApplicationFiled: June 2, 2004Publication date: January 6, 2005Inventors: Yoshiyuki Takamatsu, Masaya Shigeta, Takeshi Ohi