Patents by Inventor Yoshiteru Matsunaga
Yoshiteru Matsunaga 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: 20230303049Abstract: A check valve is arranged in a flow path through which hydraulic fluid flows. The check valve includes: a cap fixed in the flow path; a plug seated on a seat surface provided in the flow path; a first extension provided in the cap and extending from the cap toward the plug; a second extension provided in the plug, extending from the plug toward the cap, and guided by the first extension; and a spring interposed between the cap and the plug to bias the plug toward the seat surface. The check valve further includes a retainer attached to the cap, extending from the cap toward the plug, and locked to the second (52b).Type: ApplicationFiled: April 20, 2021Publication date: September 28, 2023Inventors: Tetsuo KOBORI, Motoyasu NAKAMURA, Yoshiteru MATSUNAGA
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Patent number: 10442417Abstract: One embodiment provides a hydraulic pressure generation apparatus. In the hydraulic pressure generation apparatus, a motor attached to a base body. The base body includes: a first cylinder hole having a closed bottom in which a first piston is inserted to thereby form a master cylinder; and a second cylinder hole having a closed bottom in which a second piston is inserted to thereby form a slave cylinder. The first cylinder hole and the second cylinder hole have respective openings in a surface of the base body located on one side thereof. Axial lines of the first cylinder hole, the second cylinder hole and an output shaft of the motor are arranged approximately parallel with each other.Type: GrantFiled: December 22, 2016Date of Patent: October 15, 2019Assignee: AUTOLIV NISSIN BRAKE SYSTEMS JAPAN CO., LTD.Inventors: Yoshiteru Matsunaga, Kouji Sakai, Nobuyuki Kobayashi
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Patent number: 10239511Abstract: One embodiment provides a hydraulic pressure generation apparatus including: a base body; a motor; a reservoir tank; a master cylinder which generates a brake hydraulic pressure by a brake manipulator; and a slave cylinder which generates a brake hydraulic pressure the motor. The base body includes: a first cylinder hole which is a bottomed cylinder hole, and in which the first piston is inserted; a second cylinder hole which is a bottomed cylinder hole, and in which the second piston is inserted; and a supply passage which leads from the reservoir tank to a hydraulic chamber of the slave cylinder. The supply passage is provided with a check valve which permits only inflow of brake fluid from the reservoir tank to a side of the slave cylinder, near a brake fluid discharge port of the second cylinder hole.Type: GrantFiled: March 28, 2017Date of Patent: March 26, 2019Assignee: AUTOLIV NISSIN BRAKE SYSTEMS JAPAN CO., LTD.Inventor: Yoshiteru Matsunaga
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Patent number: 10124778Abstract: A stroke sensor assembly for a vehicle braking system may include a stroke sensor, a sensor circuit board, and a sensor housing. The stroke sensor may be operable to detect a position of a piston within a hydraulic block. The sensor circuit board may be in communication with the stroke sensor and may be electrically connected to a plurality of terminals. The sensor housing may surround the stroke sensor and the sensor circuit board. The sensor housing may include a single mounting aperture for mounting the sensor housing to the hydraulic block. The sensor housing may include an integrally formed female electrical connector that at least partially houses the terminals. The female electrical connector may include an inlet opening through which a male electrical connector is received for electrical connection with the terminals. The female electrical connector may include one or more ramped surfaces defining the inlet opening.Type: GrantFiled: June 14, 2017Date of Patent: November 13, 2018Assignee: VEONEER US, INC.Inventors: Joshua Forwerck, Yoshiteru Matsunaga, Motoyasu Nakamura
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Patent number: 9981641Abstract: Provided is a body reservoir assembly whose height can be reduced. In the body reservoir assembly, the reservoir comprises: a recessed portion formed on a bottom surface of the reservoir; and a reservoir side connecting portion formed in the recessed portion and connected to a cylinder portion.Type: GrantFiled: March 29, 2013Date of Patent: May 29, 2018Assignees: Autoliv Nissin Brake Systems Japan Co., Ltd., Honda Motor Co., Ltd.Inventors: Motoyasu Nakamura, Yoshiteru Matsunaga, Kazuaki Murayama
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Patent number: 9975532Abstract: Provided is a master cylinder apparatus with a reduced size enabled by simplifying the fluid passageway configuration. A master cylinder apparatus which includes a base member containing a fluid passageway for brake fluid and to which an operation of a brake operator is inputted is provided with: a master cylinder installed on the base member to generate a fluid pressure based on an input produced by operating the brake operator; and at least two solenoid valves attached to one side of the base member to open or close the fluid passageway. The two solenoid valves are disposed symmetrically with respect to a central axis along the axial direction of the master cylinder as viewed from a direction perpendicular to the one side of the base member.Type: GrantFiled: March 29, 2013Date of Patent: May 22, 2018Assignees: Autoliv Nissin Brake Systems Japan Co., Ltd., Honda Motor Co., Ltd.Inventors: Yoshiteru Matsunaga, Motoyasu Nakamura, Kazuaki Murayama
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Publication number: 20170282879Abstract: One embodiment provides a hydraulic pressure generation apparatus including: a base body; a motor; a reservoir tank; a master cylinder which generates a brake hydraulic pressure by a brake manipulator; and a slave cylinder which generates a brake hydraulic pressure the motor. The base body includes: a first cylinder hole which is a bottomed cylinder hole, and in which the first piston is inserted; a second cylinder hole which is a bottomed cylinder hole, and in which the second piston is inserted; and a supply passage which leads from the reservoir tank to a hydraulic chamber of the slave cylinder. The supply passage is provided with a check valve which permits only inflow of brake fluid from the reservoir tank to a side of the slave cylinder, near a brake fluid discharge port of the second cylinder hole.Type: ApplicationFiled: March 28, 2017Publication date: October 5, 2017Inventor: Yoshiteru MATSUNAGA
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Patent number: 9777751Abstract: Disclosed is a braking device in which all multiple ports (for example, input ports (15c, 15d) and output ports (15a, 15b)) provided on a front surface portion (30) of a base (10) of a master cylinder (1), connector connection ports (23a, 24a) of connectors (23, 24) that electrically conducts an electrical part accommodated in a housing (20), and a pipe connection port (3c) to which a hose is connected of a reservoir (3) are arranged toward front of a vehicle when a starting device (A1) is assembled in the vehicle.Type: GrantFiled: November 21, 2012Date of Patent: October 3, 2017Assignees: Honda Motor Co., Ltd., Autoliv Nissin Brake Systems Japan Co., Ltd.Inventors: Kazuaki Murayama, Yoshiteru Matsunaga, Motoyasu Nakamura
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Publication number: 20170182992Abstract: One embodiment provides a hydraulic pressure generation apparatus. In the hydraulic pressure generation apparatus, a motor attached to a base body. The base body includes: a first cylinder hole having a closed bottom in which a first piston is inserted to thereby form a master cylinder; and a second cylinder hole having a closed bottom in which a second piston is inserted to thereby form a slave cylinder. The first cylinder hole and the second cylinder hole have respective openings in a surface of the base body located on one side thereof. Axial lines of the first cylinder hole, the second cylinder hole and an output shaft of the motor are arranged approximately parallel with each other.Type: ApplicationFiled: December 22, 2016Publication date: June 29, 2017Inventors: Yoshiteru MATSUNAGA, Kouji SAKAI, Nobuyuki KOBAYASHI
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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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Patent number: 9499146Abstract: Provided is a hydraulic braking device wherein the heat of a driving coil can be absorbed by a base body, and the heat radiation performance is excellent. The hydraulic braking device having a base body that includes therein a fluid passage for brake fluid, includes: a solenoid valve disposed on one surface of the base body; and a driving coil attached around an axis of the solenoid valve, wherein the one surface of the base body is provided with a wall surface facing an outer circumferential surface of the driving coil. A lower surface of the driving coil is in contact with the one surface of the base body, and a clearance is formed between the outer circumferential surface of the driving coil and the wall surface.Type: GrantFiled: March 29, 2013Date of Patent: November 22, 2016Assignees: Autoliv Nissin Brake Systems Japan Co., Ltd., Honda Motor Co., Ltd.Inventors: Yoshiteru Matsunaga, Motoyasu Nakamura, Kazuaki Murayama
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Patent number: 9115727Abstract: A master cylinder apparatus A1 includes a master cylinder 1 and a reservoir 3. The master cylinder 1 transduces an input to a brake operator into a brake fluid pressure. The reservoir 3 includes a fluid supply hole 3a that is connected to the master cylinder 1. A base body 10 of the master cylinder 1 includes a first cylinder hole 11a into which a piston is inserted, a reservoir union port 13a to which the fluid supply hole 3a is connected, and a communication hole 13d. The communication hole 13d has one end opening in a bottom surface of the reservoir union port 13a, and the other end opening in an inner circumferential surface of the first cylinder hole 11a. A center axis O3 of the reservoir union port 13a passes through a position being apart from a center axis O1 of the first cylinder hole 11a.Type: GrantFiled: November 21, 2012Date of Patent: August 25, 2015Assignee: NISSIN KOGYO CO., LTD.Inventor: Yoshiteru Matsunaga
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Publication number: 20150158474Abstract: Provided is a master cylinder apparatus with a reduced size enabled by simplifying the fluid passageway configuration. A master cylinder apparatus which includes a base member containing a fluid passageway for brake fluid and to which an operation of a brake operator is inputted is provided with: a master cylinder installed on the base member to generate a fluid pressure based on an input produced by operating the brake operator; and at least two solenoid valves attached to one side of the base member to open or close the fluid passageway. The two solenoid valves are disposed symmetrically with respect to a central axis along the axial direction of the master cylinder as viewed from a direction perpendicular to the one side of the base member.Type: ApplicationFiled: March 29, 2013Publication date: June 11, 2015Inventors: Yoshiteru Matsunaga, Motoyasu Nakamura, Kazuaki Murayama
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Publication number: 20150158473Abstract: Provided is a hydraulic braking device wherein the heat of a driving coil can be absorbed by a base body, and the heat radiation performance is excellent. The hydraulic braking device having a base body that includes therein a fluid passage for brake fluid, includes: a solenoid valve disposed on one surface of the base body; and a driving coil attached around an axis of the solenoid valve, wherein the one surface of the base body is provided with a wall surface facing an outer circumferential surface of the driving coil. A lower surface of the driving coil is in contact with the one surface of the base body, and a clearance is formed between the outer circumferential surface of the driving coil and the wall surface.Type: ApplicationFiled: March 29, 2013Publication date: June 11, 2015Inventors: Yoshiteru Matsunaga, Motoyasu Nakamura, Kazuaki Murayama
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Publication number: 20150068201Abstract: Provided is a body reservoir assembly whose height can be reduced. In the body reservoir assembly, the reservoir comprises: a recessed portion formed on a bottom surface of the reservoir; and a reservoir side connecting portion formed in the recessed portion and connected to a cylinder portion.Type: ApplicationFiled: March 29, 2013Publication date: March 12, 2015Applicants: NISSIN KOGYO CO., LTD., HONDA MOTOR CO., LTD.Inventors: Motoyasu Nakamura, Yoshiteru Matsunaga, Kazuaki Murayama
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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: 20140298797Abstract: Disclosed is a braking device in which all multiple ports (for example, input ports (15c, 15d) and output ports (15a, 15b)) provided on a front surface portion (30) of a base (10) of a master cylinder (1), connector connection ports (23a, 24a) of connectors (23, 24) that electrically conducts an electrical part accommodated in a housing (20), and a pipe connection port (3c) to which a hose is connected of a reservoir (3) are arranged toward front of a vehicle when a starting device (A1) is assembled in the vehicle.Type: ApplicationFiled: November 21, 2012Publication date: October 9, 2014Inventors: Kazuaki Murayama, Yoshiteru Matsunaga, Motoyasu Nakamura
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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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Patent number: 8256216Abstract: An annular sealing member 95 for establishing sealing between a boosted hydraulic pressure application chamber 22 and an input-side annular chamber 93 formed between a casing and a backup piston 64A and connected to a hydraulic pressure source is disposed between the casing and the backup piston 64A, and communication passage 216 for establishing communication between the input-side annular chamber 93 and the boosted hydraulic pressure application chamber 22 as the backup piston 64A moves forward by a predetermined stroke or more is provided in one of the backup piston 64A and the casing.Type: GrantFiled: March 25, 2009Date of Patent: September 4, 2012Assignee: Nissin Kogyo Co., Ltd.Inventors: Kouji Sakai, Hiromitsu Takizawa, Takashi Kinoshita, Yoshiteru Matsunaga