Patents by Inventor Yukito Imamura
Yukito Imamura 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: 11473698Abstract: A spool valve device includes: a housing with channels; a spool moving to change channel connection statuses; an electric actuator including an electric motor and linear-motion conversion mechanism, the motor rotating an output shaft by torque corresponding to a drive current supplied to the motor, the mechanism converting rotational output shaft movement into straight movement and applying thrust corresponding to the torque to the spool to change position; a biasing member applying biasing force to the spool against the actuator thrust; an angle detector detecting an motor output shaft angular position; a driving portion driving the motor by controlling drive current flow supplied to the motor based on a position command input and the angular position detected by the angle detector; and an abnormality determining portion calculating the spool position based on the detected angular position and determine presence or absence of operation spool abnormality.Type: GrantFiled: September 11, 2018Date of Patent: October 18, 2022Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Hideki Tanaka, Yukito Imamura, Kenjirou Hara, Masahiro Yamada, Keita Morikawa
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Publication number: 20200292100Abstract: A spool valve device includes: a housing with channels; a spool moving to change channel connection statuses; an electric actuator including an electric motor and linear-motion conversion mechanism, the motor rotating an output shaft by torque corresponding to a drive current supplied to the motor, the mechanism converting rotational output shaft movement into straight movement and applying thrust corresponding to the torque to the spool to change position; a biasing member applying biasing force to the spool against the actuator thrust; an angle detector detecting an motor output shaft angular position; a driving portion driving the motor by controlling drive current flow supplied to the motor based on a position command input and the angular position detected by the angle detector; and an abnormality determining portion calculating the spool position based on the detected angular position and determine presence or absence of operation spool abnormality.Type: ApplicationFiled: September 11, 2018Publication date: September 17, 2020Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Hideki TANAKA, Yukito IMAMURA, Kenjirou HARA, Masahiro YAMADA, Keita MORIKAWA
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Publication number: 20180051443Abstract: An electric rotating device includes: a casing including an internal space; a rotor accommodated in the internal space of the casing and supported by the casing so as to be rotatable; a stator core accommodated in the internal space of the casing and provided at the casing so as to be located around the rotor with an interval; a plurality of coils provided so as to be spaced apart from one another in a circumferential direction and winding around the stator core; and a cooling liquid enclosed in the inner space of the casing such that a part of the rotor and respective parts of the coils are immersed in the cooling liquid.Type: ApplicationFiled: March 10, 2016Publication date: February 22, 2018Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Yukito IMAMURA, Tadashi ANADA, Koji HASHIMOTO
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Patent number: 9109586Abstract: An electro-hydraulic drive system for a work machine which drives an upper rotary body by controlling a flow rate of a hydraulic fluid by a control valve, includes an electro-hydraulic pump including a hydraulic pump driven by an engine, and a first electric motor, and an electro-hydraulic motor including a hydraulic motor rotated by the hydraulic oil supplied from the electro-hydraulic pump, and a second electric motor, and a controller which determines an operating state of the first electric motor and an operating state of the second electric motor based on a load of the electro-hydraulic pump and a load of the electro-hydraulic motor, and is able to perform an efficient operation by using a hydraulic pressure (fluid pressure) and electric power.Type: GrantFiled: July 13, 2011Date of Patent: August 18, 2015Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Masahiro Yamada, Ryo Yamamoto, Yukito Imamura
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Patent number: 9070516Abstract: An electric double-layer capacitor, which provides enhanced heat release-ability with a simple configuration ensuring vibration resistance and impact resistance and to improve durability in a severe marginal environment, is provided. The electric double-layer capacitor includes capacitor cells; a pair of end plates, respectively disposed on both sides of a plurality of parallelly arranged capacitor cells; a metallic case for housing the end plates, a plurality of capacitor cells; and an insulating resin, filling the interior of the metallic case to cover the end plates, a plurality of capacitor cells and lead terminals, wherein the electric double-layer capacitor further includes an external connecting terminal having two end sections, one of the end sections being disposed in the end plate within the insulating resin, and wherein the lead terminal of the capacitor cell disposed adjacent to the end plate is configured to be connected to the one of the end sections of the external connecting terminal.Type: GrantFiled: October 25, 2011Date of Patent: June 30, 2015Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Masahiro Yamada, Yukito Imamura, Toru Morita, Tadashi Anada, Masamichi Maruyama, Noriaki Takakura
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Patent number: 9000602Abstract: An electricity-oil hybrid motor 1 includes an oil-pressure motor 10 and an electric motor 30. The electricity-oil hybrid motor 1 includes a rotating shaft 11 and causes the rotating shaft 11 to rotate by supplied operating oil. The electric motor 30 includes a rotor 32 connected to the rotating shaft 11, a stator 33 provided around the rotor 32, and a housing 34 in which the rotor 32 and the stator 33 are accommodated. The rotor 32 and the housing 34 are provided so as to surround and cover a casing 17 of the oil-pressure motor 10. The housing 34 includes a rotating shaft accommodating space 51 in which the rotating shaft 11 is accommodated and a stator accommodating space 52 in which the stator is accommodated. A sealing member 39 configured to separate the accommodating spaces 51 and 52 is provided in the housing 34.Type: GrantFiled: August 17, 2010Date of Patent: April 7, 2015Assignee: Kawasaki Jukogyo Kabushiki KaishaInventors: Masahiro Yamada, Yukito Imamura, Tadashi Anada, Masahiro Suzuki
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Publication number: 20130271893Abstract: An electric double-layer capacitor, which provides enhanced heat release-ability with a simple configuration ensuring vibration resistance and impact resistance and to improve durability in a severe marginal environment, is provided. The electric double-layer capacitor includes capacitor cells; a pair of end plates, respectively disposed on both sides of a plurality of parallelly arranged capacitor cells; a metallic case for housing the end plates, a plurality of capacitor cells; and an insulating resin, filling the interior of the metallic case to cover the end plates, a plurality of capacitor cells and lead terminals, wherein the electric double-layer capacitor further includes an external connecting terminal having two end sections, one of the end sections being disposed in the end plate within the insulating resin, and wherein the lead terminal of the capacitor cell disposed adjacent to the end plate is configured to be connected to the one of the end sections of the external connecting terminal.Type: ApplicationFiled: October 25, 2011Publication date: October 17, 2013Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Masahiro Yamada, Yukito Imamura, Toru Morita, Tadashi Anada, Masamichi Maruyama, Noriaki Takakura
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Publication number: 20130180247Abstract: An electro-hydraulic drive system for a work machine which drives an upper rotary body by controlling a flow rate of a hydraulic fluid by a control valve, includes an electro-hydraulic pump including a hydraulic pump driven by an engine, and a first electric motor, and an electro-hydraulic motor including a hydraulic motor rotated by the hydraulic oil supplied from the electro-hydraulic pump, and a second electric motor, and a controller which determines an operating state of the first electric motor and an operating state of the second electric motor based on a load of the electro-hydraulic pump and a load of the electro-hydraulic motor, and is able to perform an efficient operation by using a hydraulic pressure (fluid pressure) and electric power.Type: ApplicationFiled: July 13, 2011Publication date: July 18, 2013Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Masahiro Yamada, Ryo Yamamoto, Yukito Imamura
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Publication number: 20130177394Abstract: An electricity-oil hybrid motor 1 includes an oil-pressure motor 10 and an electric motor 30. The electricity-oil hybrid motor 1 includes a rotating shaft 11 and causes the rotating shaft 11 to rotate by supplied operating oil. The electric motor 30 includes a rotor 32 connected to the rotating shaft 11, a stator 33 provided around the rotor 32, and a housing 34 in which the rotor 32 and the stator 33 are accommodated. The rotor 32 and the housing 34 are provided so as to surround and cover a casing 17 of the oil-pressure motor 10. The housing 34 includes a rotating shaft accommodating space 51 in which the rotating shaft 11 is accommodated and a stator accommodating space 52 in which the stator is accommodated. A sealing member 39 configured to separate the accommodating spaces 51 and 52 is provided in the housing 34.Type: ApplicationFiled: August 17, 2010Publication date: July 11, 2013Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Masahiro Yamada, Yukito Imamura, Tadashi Anada, Masahiro Suzuki