Patents by Inventor Kohei Kubo
Kohei Kubo 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: 11942755Abstract: [Problem] To reduce a filter penalty caused by narrowing of an optical signal band due to optical filters having a multiplexing/demultiplexing function in an optical transmission line between transponder units. [Solution] In an optical transmission system 10A, transponder units 21a to 21n and 22a to 22n connected by optical fibers 14 in which optical filters having a multiplexing/demultiplexing function of an optical signal are interposed include a transmission unit 22 that transmits the optical signal obtained by modulating laser light from a laser light source 34 with an electric signal from a communication apparatus to the optical fibers 14, and a reception unit 23 that receives the optical signal from the optical fibers 14 and converts the received optical signal into an electric signal. The reception unit 23 includes a BER measurement unit that measures a BER, based on a received signal, and feeds the measured BER back to a transmitting side.Type: GrantFiled: May 29, 2019Date of Patent: March 26, 2024Assignee: Nippon Telegraph and Telephone CorporationInventors: Kohei Saito, Takashi Kotanigawa, Tsutomu Kubo
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Patent number: 11920591Abstract: An electric oil pump includes a motor including a motor shaft, a pump assembly including a vane pump driven by the motor to suction and discharge oil, and an inverter to drive the motor. The motor includes a rotor, a stator on a side outward from the rotor in a radial direction, and a motor housing containing the rotor and the stator. The motor housing includes a suction port through which the vane pump suctions oil from outside, and a discharge port through which the vane pump discharges oil to outside. The motor housing includes flat surface portions in a portion of an outer periphery thereof. The suction port and the discharge port are located in a first surface of side surfaces which are the flat surface portions of the motor housing and are parallel or substantially parallel to the axial direction.Type: GrantFiled: September 20, 2019Date of Patent: March 5, 2024Assignees: NIDEC TOSOK CORPORATION, KYB CORPORATIONInventors: Koji Higuchi, Yutaka Hashimoto, Yoshiyuki Maki, Kohei Kubo
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Publication number: 20240069456Abstract: Toner particles in a developer include first strontium titanate particles attached to the surface of each toner mother particle thereof. The first strontium titanate particles have a content ratio of 0.3 to 0.9 parts by mass to 100.0 parts by mass of the toner mother particles. In the developer, coat layers of carrier mother particles of first carrier particles contain barium titanate particles and a coating resin including silicone resin. The barium titanate particles have a content ratio of 2 to 47 parts by mass to 100 parts by mass of the coating resin. Second strontium titanate particles attached to the surfaces of the carrier mother particles have a diameter of 15 to 85 nm.Type: ApplicationFiled: August 30, 2023Publication date: February 29, 2024Applicant: KYOCERA Document Solutions Inc.Inventors: Kohei TERASAKI, Norio KUBO, Yuji TOYOTA, Akira MATAYOSHI
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Publication number: 20240069458Abstract: A developer set includes a first developer and a second developer. The first developer contains a first toner containing first toner particles and a first carrier containing first carrier particles. The second developer contains a second toner containing second toner particles and a second carrier containing second carrier particles. The first toner particles and the second toner particles each include a toner mother particle and external additive particles attached to the surface of the toner mother particle. The external additive particles include spacer particles. The spacer particles have a number average primary particle diameter of at least 32 nm and no greater than 145 nm. The first carrier particles each include a first carrier mother particle and strontium titanate particles attached to the surface of the first carrier mother particle.Type: ApplicationFiled: August 30, 2023Publication date: February 29, 2024Applicant: KYOCERA Document Solutions Inc.Inventors: Asami SASAKI, Norio KUBO, Masashi FUJISHIMA, Kohei TERASAKI
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Patent number: 11536268Abstract: An electric pump provided with a pump unit configured to discharge working oil by being rotationally driven by an electric motor includes: a drive shaft configured to transmit rotational driving force from the electric motor to a rotor of the pump unit; a rotation-detection shaft provided coaxially with the drive shaft, the rotation-detection shaft being configured to be rotated together with the rotor; and a rotation detector unit configured to detect rotation of the rotation-detection shaft. The rotation-detection shaft has: an engagement portion configured to engage with the rotor; and a detection-target portion facing the rotation detector unit, and an outer diameter of the detection-target portion is set so as to be larger than an outer diameter of the engagement portion.Type: GrantFiled: October 29, 2019Date of Patent: December 27, 2022Assignees: KYB CORPORATION, NIDEC TOSOK CORPORATIONInventors: Kohei Kubo, Tomoyuki Fujita, Koichiro Akatsuka, Yoshiyuki Maki, Koji Higuchi, Yutaka Hashimoto
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Publication number: 20220034315Abstract: An electric oil pump includes a motor including a motor shaft, a pump assembly including a vane pump driven by the motor to suction and discharge oil, and an inverter to drive the motor. The motor includes a rotor, a stator on a side outward from the rotor in a radial direction, and a motor housing containing the rotor and the stator. The motor housing includes a suction port through which the vane pump suctions oil from outside, and a discharge port through which the vane pump discharges oil to outside. The motor housing includes flat surface portions in a portion of an outer periphery thereof. The suction port and the discharge port are located in a first surface of side surfaces which are the flat surface portions of the motor housing and are parallel or substantially parallel to the axial direction.Type: ApplicationFiled: September 20, 2019Publication date: February 3, 2022Inventors: Koji HIGUCHI, Yutaka HASHIMOTO, Yoshiyuki MAKI, Kohei KUBO
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Publication number: 20210348620Abstract: An electric pump provided with a pump unit configured to discharge working oil by being rotationally driven by an electric motor includes: a drive shaft configured to transmit rotational driving force from the electric motor to a rotor of the pump unit; a rotation-detection shaft provided coaxially with the drive shaft, the rotation-detection shaft being configured to be rotated together with the rotor; and a rotation detector unit configured to detect rotation of the rotation-detection shaft. The rotation-detection shaft has: an engagement portion configured to engage with the rotor; and a detection-target portion facing the rotation detector unit, and an outer diameter of the detection-target portion is set so as to be larger than an outer diameter of the engagement portion.Type: ApplicationFiled: October 29, 2019Publication date: November 11, 2021Applicants: KYB Corporation, NIDEC TOSOK CORPORATIONInventors: Kohei KUBO, Tomoyuki FUJITA, Koichiro AKATSUKA, Yoshiyuki MAKI, Koji HIGUCHI, Yutaka HASHIMOTO
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Publication number: 20170009900Abstract: A relief valve comprises a ball body separated from a seat member when a pressure of a working oil from a supply passage exceeds a set pressure, and a ball-body support member biased by a biasing member and supporting the ball body. The ball-body support member comprises a holding recess portion for holding the ball body and a taper portion formed around the holding recess portion and inclined so as to become deeper toward the holding recess portion.Type: ApplicationFiled: April 14, 2015Publication date: January 12, 2017Applicant: KYB CorporationInventors: Kohei KUBO, Ryouichi NAGASAKA
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Publication number: 20150090507Abstract: A motor drive apparatus, mounted to a forklift and controlling at least one motor configured to rotate a drive wheel of the forklift, based on a speed command value indicative of a target speed of the forklift, includes a turn speed limit unit in which a speed limit curve configured to stipulate an upper limit value of a speed of the forklift is defined as a function of a turning angle of the forklift such that an angular velocity with respect to a center of rotation of the forklift does not exceed a threshold value, the turn speed limit unit being configured to limit the speed command value to be equal to or less than an upper limit value determined according to the speed limit curve and the turning angle, and a drive unit configured to drive the at least one motor according to the speed command value.Type: ApplicationFiled: December 11, 2014Publication date: April 2, 2015Inventors: Junichi Okada, Takumi Itoh, Kohei Kubo
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Publication number: 20030126087Abstract: As shown in FIG. 1, in an information supply system according to the present invention, a user available area in a built-in recording medium (20) of a recording/reproduction device (10) is used as a contents storage area, so that contents (23a) which can be used by a user are previously recorded in the built-in recording medium (20) when the recording/reproduction device (10) is shipped.Type: ApplicationFiled: October 4, 2002Publication date: July 3, 2003Inventors: Tomio Kakiuchi, Masayuki Takahashi, Hitoshi Kawamukai, Takami Uemura, Kohei Kubo, Toshinori Ito
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Patent number: 5435825Abstract: Disclosed herein is an aluminum matrix composite powder comprising 1 to 40% by weight of ceramic particles dispersed in a matrix of aluminum-silicon alloy. The matrix of the composite may further comprise at least one of Cu, Mg and transition metals.The aluminum matrix composite is prepared by a rapid solidification.In the aluminum matrix composite, the ceramic particles are very uniformly dispersed in the matrix, thereby the improvement of mechanical properties of product prepared therefrom can be obtained.Type: GrantFiled: August 7, 1992Date of Patent: July 25, 1995Assignee: Toyo Aluminum Kabushiki KaishaInventors: Jun Kusui, Fumiaki Nagase, Akiei Tanaka, Kohei Kubo, Takamasa Yokote
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Patent number: 5405576Abstract: A hypereutectic aluminum-silicon alloy produced by a powder metallurgy technique disclosed herein comprises 12 to 50% by weight of silicon, 1.0 to 5.0% by weight of copper and 0.01 to 0.05% by weight of phosphorus, the content of Ca as an impurity being controlled to be 0.03% by weight or less. The hyereutectic aluminum-silicon alloy of the present invention is excellent in machinability and mechanical strength.Type: GrantFiled: July 16, 1992Date of Patent: April 11, 1995Assignees: Toyo Aluminum Kabushiki Kaisha, Sumitomo Electric Industries, Ltd.Inventors: Jun Kusui, Akiei Tanaka, Kohei Kubo, Takashi Watsuji, Takamasa Yokote
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Patent number: 4781724Abstract: Process for the simultaneous dyeing and permanent shaping of white and gray hair, in which the hair is first treated with a shaping composition, then rinsed with water and treated with a fixing composition, characterized in that a shaping composition is used which comprises a content of at least one red-violet dyeing xanthene dyestuff and a fixing composition with a content of at least one blue dyeing anthraquinone dyestuff. The process, according to the invention, offers the advantage that the unwanted yellow shade in white and gray hair is permanently removed during the hair shaping treatment without an additional dyeing treatment.Type: GrantFiled: July 22, 1987Date of Patent: November 1, 1988Assignee: Wella AktiengesellschaftInventors: Theodor Wajaroff, Peter Hartmann, Kohei Kubo
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Patent number: D1009875Type: GrantFiled: January 18, 2022Date of Patent: January 2, 2024Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Seiichi Watanabe, Kohei Kubo