Patents by Inventor Yoshiyuki Shimada
Yoshiyuki Shimada 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: 20230228342Abstract: A fluid control device includes a housing partitioned into an input chamber and an output chamber by a housing land portion extending on the radially inner side, a spool arranged inside the housing and provided with a spool land portion that is configured to reciprocatively slide with respect to the housing land portion and that extends on a radially outer side of the spool, and a biasing member configured to bias the spool toward a valve closing position, wherein upon receiving drive force from an exterior, the spool is moved against bias force of the biasing member, and the input chamber and the output chamber communicate with each other, the spool includes a large diameter portion arranged in the input chamber and having a larger diameter than the spool land portion, and the large diameter portion and the housing land portion form a poppet valve structure.Type: ApplicationFiled: May 24, 2021Publication date: July 20, 2023Inventor: Yoshiyuki SHIMADA
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Patent number: 11371535Abstract: A fluid pressure circuit includes a directional switching valve arranged between a fixed displacement pump and a fluid pressure actuator and configured to switch a flow passage for a pressurized fluid, an accumulator arranged in a branch flow passage branched from a connection flow passage that connects the fluid pressure actuator and the directional switching valve, an accumulator flow control valve arranged between the connection flow passage and the accumulator, and a pump flow control valve arranged between the fluid pressure actuator and the fixed displacement pump and configured to variably divert a flow rate of the pressurized fluid discharged from the fixed displacement pump into a first system including the tank and a second system including the fluid pressure actuator.Type: GrantFiled: April 3, 2019Date of Patent: June 28, 2022Inventor: Yoshiyuki Shimada
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Patent number: 11225983Abstract: A fluid circuit includes a pressure fluid source configured to supply pressure fluid, multiple actuators connected to the pressure fluid source, a direction switching valve configured to switch a supply destination of the pressure fluid supplied from the pressure fluid source, and a discharge amount control mechanism configured to control the output pressure of the pressure fluid source such that a pressure difference ?P between the output pressure of the pressure fluid source and the maximum load pressure of the load pressures of the multiple actuators reaches a target value ?Pt. The fluid circuit further includes an accumulator configured to accumulate part of return fluid from the actuators.Type: GrantFiled: September 25, 2019Date of Patent: January 18, 2022Inventor: Yoshiyuki Shimada
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Publication number: 20210372088Abstract: A fluid circuit includes a pressure fluid source configured to supply pressure fluid, multiple actuators connected to the pressure fluid source , a direction switching valve configured to switch a supply destination of the pressure fluid supplied from the pressure fluid source , and a discharge amount control mechanism configured to control the output pressure of the pressure fluid source such that a pressure difference ?P between the output pressure of the pressure fluid source and the maximum load pressure of the load pressures of the multiple actuators reaches a target value ?Pt. The fluid circuit further includes an accumulator configured to accumulate part of return fluid from the actuators.Type: ApplicationFiled: September 25, 2019Publication date: December 2, 2021Inventor: Yoshiyuki SHIMADA
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Publication number: 20210364015Abstract: A fluid pressure circuit includes a directional switching valve arranged between a fixed displacement pump and a fluid pressure actuator and configured to switch a flow passage for a pressurized fluid, an accumulator arranged in a branch flow passage branched from a connection flow passage that connects the fluid pressure actuator and the directional switching valve, an accumulator flow control valve arranged between the connection flow passage and the accumulator, and a pump flow control valve arranged between the fluid pressure actuator and the fixed displacement pump and configured to variably divert a flow rate of the pressurized fluid discharged from the fixed displacement pump into a first system including the tank and a second system including the fluid pressure actuator.Type: ApplicationFiled: April 3, 2019Publication date: November 25, 2021Inventor: Yoshiyuki SHIMADA
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Patent number: 10801533Abstract: A fluid pressure circuit for controlling a rod of a cylinder controlled in accordance with an operation command includes a tank, a fluid pressure actuator configured to pressurize fluid supplied from the tank for extending and retracting the cylinder, a flow control valve arranged between the fluid pressure actuator and the cylinder device configured to switch a flow passage of pressurized fluid and discharge via a first throttle return fluid from the cylinder, a variable regeneration switching valve configured to discharge return fluid from the cylinder to the flow control valve upon non-regeneration and upon regeneration, branch part of the return fluid and discharge via a second throttle the fluid branched, a regenerative motor configured for regeneration by fluid branched by the variable regeneration switching valve, and a third throttle connected in series with the first throttle upon the regeneration to limit flow of return fluid.Type: GrantFiled: February 6, 2018Date of Patent: October 13, 2020Assignee: EAGLE INDUSTRY CO., LTD.Inventor: Yoshiyuki Shimada
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Patent number: 10746293Abstract: A fluid pressure circuit includes an HST circuit having a variable capacity fluid pressure pump configured to be driven by a mechanism to perform forward-reverse rotation, a fluid pressure motor configured to be driven by fluid discharged from the fluid pressure pump to perform forward-reverse rotation, a first line configured to connect a first port of the fluid pressure pump and a first port of the fluid pressure motor, and a second line configured to connect a second port of the fluid pressure pump and a second port of the fluid pressure motor; an accumulator connected in parallel with the fluid pressure pump; an accumulator pump configured to accumulate pressure fluid in the accumulator; and an accumulator switching valve configured to switch connection between the fluid pressure motor and the accumulator.Type: GrantFiled: August 22, 2017Date of Patent: August 18, 2020Assignee: EAGLE INDUSTRY CO., LTD.Inventor: Yoshiyuki Shimada
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Publication number: 20200040920Abstract: A fluid pressure circuit for controlling a rod of a cylinder controlled in accordance with an operation command includes a tank, a fluid pressure actuator configured to pressurize fluid supplied from the tank for extending and retracting the cylinder, a flow control valve arranged between the fluid pressure actuator and the cylinder device configured to switch a flow passage of pressurized fluid and discharge via a first throttle return fluid from the cylinder, a variable regeneration switching valve configured to discharge return fluid from the cylinder to the flow control valve upon non-regeneration and upon regeneration, branch part of the return fluid and discharge via a second throttle the fluid branched, a regenerative motor configured for regeneration by fluid branched by the variable regeneration switching valve, and a third throttle connected in series with the first throttle upon the regeneration to limit flow of return fluid.Type: ApplicationFiled: February 6, 2018Publication date: February 6, 2020Inventor: Yoshiyuki SHIMADA
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Publication number: 20190178374Abstract: A fluid pressure circuit includes an HST circuit having a variable capacity fluid pressure pump configured to be driven by a mechanism to perform forward-reverse rotation, a fluid pressure motor configured to be driven by fluid discharged from the fluid pressure pump to perform forward-reverse rotation, a first line configured to connect a first port of the fluid pressure pump and a first port of the fluid pressure motor, and a second line configured to connect a second port of the fluid pressure pump and a second port of the fluid pressure motor; an accumulator connected in parallel with the fluid pressure pump; an accumulator pump configured to accumulate pressure fluid in the accumulator; and an accumulator switching valve configured to switch connection between the fluid pressure motor and the accumulator.Type: ApplicationFiled: August 22, 2017Publication date: June 13, 2019Inventor: Yoshiyuki SHIMADA
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Patent number: 10247206Abstract: A fluid circuit includes a pressure fluid source, a switching valve, and a cylinder device having first and second chambers and partitioned by a piston. A first accumulator is configured to communicate with the second chamber when pressure fluid is supplied to the first chamber and to accumulate part of the pressure fluid from the second chamber. A pressure booster is connected in hydraulically parallel to the first accumulator, the pressure booster communicative with the second chamber when the pressure fluid is supplied to the first chamber to boost pressure of the pressure fluid by using part of the pressure fluid from the second chamber. A second accumulator accumulates the pressure fluid whose pressure is boosted by the pressure booster.Type: GrantFiled: December 22, 2016Date of Patent: April 2, 2019Assignee: EAGLE INDUSTRY CO., LTD.Inventor: Yoshiyuki Shimada
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Publication number: 20180180065Abstract: A fluid circuit includes a pressure fluid source, a switching valve, and a cylinder device having first and second chambers and partitioned by a piston. A first accumulator is configured to communicate with the second chamber when pressure fluid is supplied to the first chamber and to accumulate part of the pressure fluid from the second chamber. A pressure booster is connected in hydraulically parallel to the first accumulator, the pressure booster communicative with the second chamber when the pressure fluid is supplied to the first chamber to boost pressure of the pressure fluid by using part of the pressure fluid from the second chamber. A second accumulator accumulates the pressure fluid whose pressure is boosted by the pressure booster.Type: ApplicationFiled: December 22, 2016Publication date: June 28, 2018Inventor: Yoshiyuki Shimada
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Patent number: 8588787Abstract: A neighboring cell processing device includes: a measurement information acquisition unit 11 for acquiring measurement information which indicates a result of measurement of radio signals transmitted from a plurality of wireless base station devices other than a target wireless base station device, based on information provided from at least either of wireless terminal devices or wireless base station devices; and a neighboring cell information generation unit 12 for generating, based on the measurement information acquired by the measurement information acquisition unit 11, neighboring cell information which indicates one or a plurality of wireless base station devices located in the neighborhood of the target wireless base station device, among the plurality of wireless base station devices other than the target wireless base station device.Type: GrantFiled: May 23, 2011Date of Patent: November 19, 2013Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kenichi Murakami, Yoshiyuki Shimada
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Publication number: 20130271256Abstract: A method includes a step of compacting an insulation-coated pure iron powder or an iron-based alloy powder mainly containing iron using a die to obtain a dust core, a step of heat-treating the obtained dust core, and a step of post-machining at least one portion of the heat-treated dust core using a grinding wheel. In the post-machining step, grinding is performed in such a manner that the dust core and the grinding wheel are rotated, whereby isotropic machining marks are formed on a machined surface of the dust core.Type: ApplicationFiled: July 6, 2012Publication date: October 17, 2013Applicants: SUMITOMO ELECTRIC SINTERED ALLOY, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Tomoyuki Ueno, Yoshiyuki Shimada
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Patent number: 8539762Abstract: A hydraulic control circuit includes a hydraulic cylinder, a control valve, a recovery oil passage, a hydraulic pump, an engine rotation speed setting unit, a recovery control valve, and a controller that reduces an engine rotation speed to not more than a preset reduction control engine rotation speed when the load is lowered; and adjusts an increase or decrease in an opening amount of the recovery control valve in accordance with a level of the target rotation speed set by the engine rotation speed setting unit.Type: GrantFiled: July 18, 2007Date of Patent: September 24, 2013Assignee: Caterpillar Japan Ltd.Inventors: Yoshiyuki Shimada, Hiroyasu Nishikawa, Masaru Mishima, Yutaka Yokoyama
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Publication number: 20130012212Abstract: A neighboring cell processing device includes: a measurement information acquisition unit 11 for acquiring measurement information which indicates a result of measurement of radio signals transmitted from a plurality of wireless base station devices other than a target wireless base station device, based on information provided from at least either of wireless terminal devices or wireless base station devices; and a neighboring cell information generation unit 12 for generating, based on the measurement information acquired by the measurement information acquisition unit 11, neighboring cell information which indicates one or a plurality of wireless base station devices located in the neighborhood of the target wireless base station device, among the plurality of wireless base station devices other than the target wireless base station device.Type: ApplicationFiled: May 23, 2011Publication date: January 10, 2013Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kenichi Murakami, Yoshiyuki Shimada
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Patent number: 8241518Abstract: A soft magnetic material includes a plurality of composite magnetic particles including a metal magnetic particle and an insulating film surrounding a surface of the metal magnetic particle. The insulating film also contains a phosphate. The soft magnetic material further includes an aromatic polyetherketone resin and a metallic soap and/or an inorganic lubricant having a hexagonal crystal structure. The metallic soap and the inorganic lubricant are particles with an average particle size of not more than 2.0 ?m.Type: GrantFiled: May 15, 2007Date of Patent: August 14, 2012Assignees: Sumitomo Electric Industries, Ltd., Denso Corporation, Sumitomo Electric Sintered Alloy, Ltd.Inventors: Naoto Igarashi, Takao Nishioka, Yoshiyuki Shimada, Tsuyoshi Akao
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Publication number: 20120184311Abstract: The present invention relates to a base station device 1 that performs wireless communication with a terminal device 2 existing in its cell. The base station device 1 includes an obtainment unit (reception unit 12) that obtains control information for another base station device 1 to achieve synchronization with the another base station device 1, and a selection unit (synchronization control unit 40) that selects the another base station device 1 to be a synchronization source, based on identification information that specifies the type of the another base station device 1, the identification information being included in the control information.Type: ApplicationFiled: October 7, 2010Publication date: July 19, 2012Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takashi Yamamoto, Kenichi Murakami, Yoshizo Tanaka, Yoshiyuki Shimada
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Publication number: 20120184312Abstract: A base station device includes: a downlink signal reception unit 12 that receives a transmission signal from another base station device; a synchronization processing unit 5b that obtains the transmission signal received by the downlink signal reception unit 12, and performs a synchronization process by using the transmission signal; and a terminal detection unit 5e that detects the state of communication with terminal devices connected to the base station device and/or the another base station device. The synchronization processing unit 5b adjusts the timing to obtain the transmission signal, based on a detection result of the terminal detection unit 5e.Type: ApplicationFiled: October 7, 2010Publication date: July 19, 2012Applicant: Sumitomo Electric Industries, Ltd.Inventors: Takashi Yamamoto, Kenichi Murakami, Yoshiyuki Shimada
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Patent number: 8191364Abstract: The present invention is intended to provide a technology that can utilize the advantages of both a load sensing control and a regeneration circuit without causing any problem. A regeneration circuit is added to a hydraulic circuit provided with a hydraulic pressure signal line for detecting a hydraulic pressure value of a circuit and controlling a volume of hydraulic fluid to a cylinder 1 with reference to the detected value. A pressure reducing valve 6 that outputs a reduced pressure as an operating signal to a pump 2, and subsequently the controlling means 5 causes the pressure reducing valve 6 to output a pressure reduction command to a pump 2 and thus to reduce a discharge rate from the pump 2, when the regeneration circuit is in a regeneration state.Type: GrantFiled: June 19, 2007Date of Patent: June 5, 2012Assignee: Caterpillar S.A.R.L.Inventors: Yoshiyuki Shimada, Tetsuya Yoshino, Nobuhiro Miki, Yuya Kanenawa, Yutaka Yokoyama, Takayasu Kitai
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Patent number: 7998361Abstract: A soft magnetic material includes: a plurality of composite magnetic particles formed from a metal magnetic particle and an insulative coating surrounding a surface of the metal magnetic particle and containing metallic salt phosphate and/or oxide; and a lubricant formed as fine particles added at a proportion of at least 0.001 percent by mass and no more than 0.1 percent by mass relative to the plurality of composite magnetic particles. With this structure, superior lubrication is provided during compacting and desired magnetic characteristics can be obtained after compacting.Type: GrantFiled: March 29, 2005Date of Patent: August 16, 2011Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kazuhiro Hirose, Haruhisa Toyoda, Takao Nishioka, Naoto Igarashi, Toru Maeda, Yoshiyuki Shimada