Patents by Inventor Takashi NAKATSUJI
Takashi NAKATSUJI 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: 11964489Abstract: An inkjet recording apparatus includes a recording head including a plurality of nozzles for ejecting ink, a conveyor belt that has a plurality of apertures and conveys recording media one by one, a control unit, an ink receiver, and a pipe-shaped ink discharge flow path. The control unit controls drive of the recording head and the conveyor belt to perform flushing, in which the ink is ejected from the nozzle of the recording head to pass through one of the apertures, at a timing different from a timing contributing to image recording. The ink receiver is disposed to face the recording head sandwiching the conveyor belt therebetween, to receive the ink after passing through the aperture when the flushing is performed. The ink discharge flow path is connected to the ink receiver. When the flushing is performed, a predetermined amount of liquid is stored in the ink receiver.Type: GrantFiled: March 21, 2022Date of Patent: April 23, 2024Assignee: KYOCERA Document Solutions Inc.Inventors: Takashi Somete, Chikara Ishihara, Noriaki Furukawa, Takuma Araki, Jun Nakano, Hiroomi Nakatsuji, Issei Nakano
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Patent number: 11815084Abstract: A hydraulic system includes: a cylinder that moves a moving object in a vertical direction by extension and retraction of a rod; a first bidirectional pump connected to a head-side chamber of the cylinder by a first supply/discharge line; a second bidirectional pump connected to a rod-side chamber of the cylinder by a second supply/discharge line and coupled to the first bidirectional pump in a manner enabling torque to be transmitted between the first and second bidirectional pumps; a relay line connecting the first and second bidirectional pumps such that a hydraulic liquid discharged from one of the first and second bidirectional pumps is introduced into the other of the first and second bidirectional pumps; and a servomotor that drives the first or second bidirectional pump. At least one of the first and second bidirectional pumps is a variable displacement pump whose delivery capacity per rotation is freely variable.Type: GrantFiled: November 15, 2019Date of Patent: November 14, 2023Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Akihiro Kondo, Hiroaki Mitsui, Toshihisa Toyota, Koki Mibu, Takashi Nakatsuji
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Patent number: 11486416Abstract: A hydraulic system includes: a cylinder in which an interior of a tube is divided by a piston into a first pressure chamber and a second pressure chamber; a first bidirectional pump connected to the first pressure chamber by a first supply/discharge line; a second bidirectional pump connected to the second pressure chamber by a second supply/discharge line and coupled to the first bidirectional pump in a manner enabling torque to be transmitted between the first and second bidirectional pumps; a relay line connecting the first and second bidirectional pumps such that a hydraulic liquid discharged from one of the first and second bidirectional pumps is introduced into the other of the first and second bidirectional pumps; and an electric motor that drives the first or second bidirectional pump. At least one of the first and second bidirectional pumps is a variable displacement pump whose delivery capacity per rotation is freely variable.Type: GrantFiled: November 15, 2019Date of Patent: November 1, 2022Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Akihiro Kondo, Hiroaki Mitsui, Toshihisa Toyota, Koki Mibu, Takashi Nakatsuji
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Patent number: 11434935Abstract: A hydraulic pressure supply device includes: a hydraulic pump capable of changing a discharge capacity; an electric motor capable of changing a rotational frequency; a discharge capacity adjustment mechanism capable of adjusting the discharge capacity of the pump between a maximum and minimum discharge capacity; a pressure detector configured to detect pressure of an operating liquid discharged from the pump; a rotational frequency detector configured to detect the rotational frequency of the motor; and a controller configured to control operations of the motor and adjustment mechanism based on the rotational frequency, detected by the detector, to keep pressure of an actuator at arbitrary pressure, wherein, the controller controls the operation of the adjustment mechanism so the discharge capacity of the pump becomes a set lower limit discharge capacity. The set lower limit discharge capacity is set to be larger than the minimum discharge capacity and be adjustable by the controller.Type: GrantFiled: April 22, 2019Date of Patent: September 6, 2022Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Akihiro Kondo, Hiroaki Mitsui, Toshihisa Toyota, Takashi Nakatsuji
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Publication number: 20220010817Abstract: A hydraulic system includes: a cylinder in which an interior of a tube is divided by a piston into a first pressure chamber and a second pressure chamber; a first bidirectional pump connected to the first pressure chamber by a first supply/discharge line; a second bidirectional pump connected to the second pressure chamber by a second supply/discharge line and coupled to the first bidirectional pump in a manner enabling torque to be transmitted between the first and second bidirectional pumps; a relay line connecting the first and second bidirectional pumps such that a hydraulic liquid discharged from one of the first and second bidirectional pumps is introduced into the other of the first and second bidirectional pumps; and an electric motor that drives the first or second bidirectional pump. At least one of the first and second bidirectional pumps is a variable displacement pump whose delivery capacity per rotation is freely variable.Type: ApplicationFiled: November 15, 2019Publication date: January 13, 2022Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Akihiro KONDO, Hiroaki MITSUI, Toshihisa TOYOTA, Koki MIBU, Takashi NAKATSUJI
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Publication number: 20220010792Abstract: A hydraulic system includes: a cylinder that moves a moving object in a vertical direction by extension and retraction of a rod; a first bidirectional pump connected to a head-side chamber of the cylinder by a first supply/discharge line; a second bidirectional pump connected to a rod-side chamber of the cylinder by a second supply/discharge line and coupled to the first bidirectional pump in a manner enabling torque to be transmitted between the first and second bidirectional pumps; a relay line connecting the first and second bidirectional pumps such that a hydraulic liquid discharged from one of the first and second bidirectional pumps is introduced into the other of the first and second bidirectional pumps; and a servomotor that drives the first or second bidirectional pump. At least one of the first and second bidirectional pumps is a variable displacement pump whose delivery capacity per rotation is freely variable.Type: ApplicationFiled: November 15, 2019Publication date: January 13, 2022Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Akihiro KONDO, Hiroaki MITSUI, Toshihisa TOYOTA, Koki MIBU, Takashi NAKATSUJI
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Publication number: 20210048043Abstract: A hydraulic pressure supply device includes: a hydraulic pump capable of changing a discharge capacity; an electric motor capable of changing a rotational frequency; a discharge capacity adjustment mechanism capable of adjusting the discharge capacity of the pump between a maximum and minimum discharge capacity; a pressure detector configured to detect pressure of an operating liquid discharged from the pump; a rotational frequency detector configured to detect the rotational frequency of the motor; and a controller configured to control operations of the motor and adjustment mechanism based on the rotational frequency, detected by the detector, to keep pressure of an actuator at arbitrary pressure, wherein, the controller controls the operation of the adjustment mechanism so the discharge capacity of the pump becomes a set lower limit discharge capacity. The set lower limit discharge capacity is set to be larger than the minimum discharge capacity and be adjustable by the controller.Type: ApplicationFiled: April 22, 2019Publication date: February 18, 2021Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Akihiro KONDO, Hiroaki MITSUI, Toshihisa TOYOTA, Takashi NAKATSUJI