Patents by Inventor Tsuyoshi HIRONAKA
Tsuyoshi HIRONAKA 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: 11820305Abstract: A working fluid supply system is provided with: a first oil pump and a second oil pump driven by an engine; a switching valve configured to cause a discharge passage of the second oil pump to communicate with at least one of a supply passage and a first drain passage; and a controller configured to switch the switching valve. The controller is configured to switch the switching valve by spending a switching time that is set in accordance with a degree of pressure variation predicted to be caused in the supply passage when the switching valve is switched instantaneously.Type: GrantFiled: October 13, 2020Date of Patent: November 21, 2023Assignee: KYB CORPORATIONInventors: Tsuyoshi Hironaka, Midori Nagashima, Ken Tsukui, Kazuya Murota
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Publication number: 20230011239Abstract: A working fluid supply system is provided with: a first oil pump and a second oil pump driven by an engine; a switching valve configured to cause a discharge passage of the second oil pump to communicate with at least one of a supply passage and a first drain passage; and a controller configured to switch the switching valve. The controller is configured to switch the switching valve by spending a switching time that is set in accordance with a degree of pressure variation predicted to be caused in the supply passage when the switching valve is switched instantaneously.Type: ApplicationFiled: October 13, 2020Publication date: January 12, 2023Applicant: KYB CorporationInventors: Tsuyoshi HIRONAKA, Midori NAGASHIMA, Ken TSUKUI, Kazuya MUROTA
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Publication number: 20220389944Abstract: A working-fluid supply system includes: a first pump and a second pump driven by an engine; a first switching valve capable of switching a supply target of the second pump to either one of the discharge side and the suction side of the first pump; a first switching control unit configured to perform a switching control of the first switching valve; and a first pressure control unit configured to perform a control such that pressure on the suction side of the first pump becomes a predetermined first pressure when the first switching valve is switched such that the supply target of the second pump becomes the suction side of the first pump.Type: ApplicationFiled: October 13, 2020Publication date: December 8, 2022Applicant: KYB CorporationInventors: Tsuyoshi HIRONAKA, Midori NAGASHIMA, Ken TSUKUI, Kazuya MUROTA
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Patent number: 10139004Abstract: A solenoid valve includes a housing having a valve passage; a spool configured to switch between an open and closed state of the valve passage; a coil part configured to generate magnetic force when electric current flows therethrough; a yoke surrounding the coil part; a fluid passage provided on an outer side of the coil part, through which the working fluid passes; an introduction passage communicating with the fluid passage to guide the working fluid inside the housing to the fluid passage; and a discharge passage communicating with the fluid passage to discharge the working fluid passed through the fluid passage outside the yoke.Type: GrantFiled: August 24, 2015Date of Patent: November 27, 2018Assignee: KYB CorporationInventor: Tsuyoshi Hironaka
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Patent number: 10132421Abstract: A solenoid includes a coil configured to generate magnetic force when a current flows therethrough; a stator core provided inside the coil, the stator core being configured to be excited by the magnetic force of the coil; a plunger received in a plunger chamber formed inside the stator core, the plunger being configured to move toward an attraction part in the plunger chamber by the magnetic force of the coil; a shaft provided to be able to move, together with the plunger, along axial direction; and a filter provided inside the stator core. The filter is provided on a side of the attraction part from the plunger and in an axial range where the coil is provided.Type: GrantFiled: August 24, 2015Date of Patent: November 20, 2018Assignee: KYB CorporationInventor: Tsuyoshi Hironaka
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Patent number: 9856992Abstract: A solenoid valve includes a housing having a cylindrical shape and having a valve path, a spool adjusting an opening degree of the valve path, a coil producing a magnetic force when a current passes therethrough, a first and a second stator core excited by the magnetic force of the coil, a shaft configured to be movable along axial direction together with the spool, a plunger fixed to the shaft and moving in the axial direction by adsorption force acting between itself and the first stator core by the magnetic force of the coil, and a coil spring biasing the spool against the adsorption force acting on the plunger. A spring constant of the coil spring increases as the adsorption force increases by the movement of the plunger.Type: GrantFiled: June 23, 2015Date of Patent: January 2, 2018Assignee: KYB CorporationInventor: Tsuyoshi Hironaka
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Publication number: 20170284557Abstract: A solenoid includes a coil configured to generate magnetic force when a current flows therethrough; a stator core provided inside the coil, the stator core being configured to be excited by the magnetic force of the coil; a plunger received in a plunger chamber formed inside the stator core, the plunger being configured to move toward an attraction part in the plunger chamber by the magnetic force of the coil; a shaft provided to be able to move, together with the plunger, along axial direction; and a filter provided inside the stator core. The filter is provided on a side of the attraction part from the plunger and in an axial range where the coil is provided.Type: ApplicationFiled: August 24, 2015Publication date: October 5, 2017Applicant: KYB CorporationInventor: Tsuyoshi HIRONAKA
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Publication number: 20170276253Abstract: A solenoid valve includes a housing having a valve passage; a spool configured to switch between an open and closed state of the valve passage; a coil part configured to generate magnetic force when electric current flows therethrough; a yoke surrounding the coil part; a fluid passage provided on an outer side of the coil part, through which the working fluid passes; an introduction passage communicating with the fluid passage to guide the working fluid inside the housing to the fluid passage; and a discharge passage communicating with the fluid passage to discharge the working fluid passed through the fluid passage outside the yoke.Type: ApplicationFiled: August 24, 2015Publication date: September 28, 2017Applicant: KYB CorporationInventor: Tsuyoshi HIRONAKA
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Publication number: 20170175915Abstract: A solenoid valve includes a housing having a cylindrical shape and having a valve path, a spool adjusting an opening degree of the valve path, a coil producing a magnetic force when a current passes therethrough, a first and a second stator core excited by the magnetic force of the coil, a shaft configured to be movable along axial direction together with the spool, a plunger fixed to the shaft and moving in the axial direction by adsorption force acting between itself and the first stator core by the magnetic force of the coil, and a coil spring biasing the spool against the adsorption force acting on the plunger. A spring constant of the coil spring increases as the adsorption force increases by the movement of the plunger.Type: ApplicationFiled: June 23, 2015Publication date: June 22, 2017Applicant: KYB CorporationInventor: Tsuyoshi HIRONAKA