Patents by Inventor Ryu Fukushima
Ryu Fukushima 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: 20230344304Abstract: A power transmission device includes: a pole piece configured to rotate by modulating a magnetic flux between a drive-side magnet and a stationary magnet; and a sealing member that partitions an inside of a housing into a driving side space where the drive-side magnet is disposed and a driven side space where the stationary magnet and the pole piece are disposed, so as to seal fluid between the driving side space and the driven side space. The pole piece and the stationary magnet have a cylindrical shape and are disposed coaxially with and radially outer side of the drive-side magnet. The sealing member includes: a sealing cylinder portion positioned radially outer side of the drive-side magnet; and a sealing bottom surface portion covering the sealing cylinder portion from the driving side space.Type: ApplicationFiled: June 12, 2023Publication date: October 26, 2023Inventors: Takafumi MATSUMOTO, Hiroto INOUE, Takuro SAHARA, Shinji HASHIMOTO, Ryu FUKUSHIMA, Ryotaro SUZUKI, Riku OUCHI, Shinji KAWADA, Toshihisa NAKAJIMA, Seiichiro WASHINO
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Patent number: 11549522Abstract: An ejector includes a nozzle, a needle and a body. The nozzle reduces a pressure of a fluid and discharges the fluid as an injected fluid from a fluid injection port. The body includes a fluid suction port and a pressure increasing portion. The fluid suction port draws, as a suction fluid, a fluid from an outside of the body by using a suction force generated by the injected fluid. The pressure increasing portion increases a pressure of a mixture of the injected fluid and the suction fluid. The nozzle includes a throat portion and a nozzle-side tapered portion. The throat portion reduces a passage cross-sectional area of the fluid passage to be smallest in the fluid passage at the throat portion. The nozzle-side tapered portion expands the passage cross-sectional area of the fluid passage toward the downstream side in the flow direction of the fluid.Type: GrantFiled: June 26, 2019Date of Patent: January 10, 2023Assignee: DENSO CORPORATIONInventors: Tatsuhiro Suzuki, Gota Ogata, Yoichiro Kawamoto, Ryu Fukushima
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Patent number: 11480197Abstract: When an ejector having a variable nozzle and a variable throttle mechanism are integrated together as an ejector module, a nozzle-side central axis CL1 and a decompression-side driving mechanism have a twisted positional relationship, if the nozzle-side central axis CL1 is defined as a central axis of a nozzle-side driving mechanism in a displacement direction in which the nozzle-side driving mechanism of the ejector having the variable nozzle displaces a needle valve, and the decompression-side central axis CL2 is defined as a central axis of a decompression-side driving mechanism in a displacement direction in which the decompression-side driving mechanism of the variable throttle mechanism displaces a throttle valve. When viewed from the central axis direction of one of the nozzle-side central axis CL1 and the decompression-side central axis CL2, a driving portion corresponding to the one central axis is disposed to overlap with the other central axis.Type: GrantFiled: August 30, 2019Date of Patent: October 25, 2022Assignee: DENSO CORPORATIONInventors: Yoichiro Kawamoto, Gota Ogata, Hiroshi Oshitani, Ryu Fukushima, Teruyuki Hotta, Tatsuhiro Suzuki, Hang Yuan, Daisuke Sakurai, Masahiro Ito, Hiroshi Maeda
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Publication number: 20190383308Abstract: When an ejector having a variable nozzle and a variable throttle mechanism are integrated together as an ejector module, a nozzle-side central axis CL1 and a decompression-side driving mechanism have a twisted positional relationship, if the nozzle-side central axis CL1 is defined as a central axis of a nozzle-side driving mechanism in a displacement direction in which the nozzle-side driving mechanism of the ejector having the variable nozzle displaces a needle valve, and the decompression-side central axis CL2 is defined as a central axis of a decompression-side driving mechanism in a displacement direction in which the decompression-side driving mechanism of the variable throttle mechanism displaces a throttle valve. When viewed from the central axis direction of one of the nozzle-side central axis CL1 and the decompression-side central axis CL2, a driving portion corresponding to the one central axis is disposed to overlap with the other central axis.Type: ApplicationFiled: August 30, 2019Publication date: December 19, 2019Inventors: Yoichiro KAWAMOTO, Gota OGATA, Hiroshi OSHITANI, Ryu FUKUSHIMA, Teruyuki HOTTA, Tatsuhiro SUZUKI, Hang YUAN, Daisuke SAKURAI, Masahiro ITO, Hiroshi MAEDA
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Publication number: 20190338790Abstract: An ejector includes a nozzle, a needle and a body. The nozzle reduces a pressure of a fluid and discharges the fluid as an injected fluid from a fluid injection port. The body includes a fluid suction port and a pressure increasing portion. The fluid suction port draws, as a suction fluid, a fluid from an outside of the body by using a suction force generated by the injected fluid. The pressure increasing portion increases a pressure of a mixture of the injected fluid and the suction fluid. The nozzle includes a throat portion and a nozzle-side tapered portion. The throat portion reduces a passage cross-sectional area of the fluid passage to be smallest in the fluid passage at the throat portion. The nozzle-side tapered portion expands the passage cross-sectional area of the fluid passage toward the downstream side in the flow direction of the fluid.Type: ApplicationFiled: June 26, 2019Publication date: November 7, 2019Inventors: Tatsuhiro SUZUKI, Gota OGATA, Yoichiro KAWAMOTO, Ryu FUKUSHIMA
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Patent number: 10378795Abstract: An ejector refrigeration cycle includes a bypass passage that guides a refrigerant on an outlet side of an evaporator drawn from a refrigerant suction port of an ejector to a suction port side of a compressor while bypassing a diffuser passage of the ejector. A differential pressure regulating valve is disposed as a bypass flow-rate adjustment device that adjusts a bypass flow rate of the refrigerant circulating though the bypass passage. An enlarged portion for gradually enlarging the passage area is formed at a most downstream part of the refrigerant flow in the bypass passage. During a low-load operation, the differential pressure regulating valve increases the bypass flow rate, thereby allowing the refrigerant to flow into the evaporator connected to the upstream side of a refrigerant suction port using the suction effect of the compressor.Type: GrantFiled: July 14, 2015Date of Patent: August 13, 2019Assignee: DENSO CORPORATIONInventors: Ryu Fukushima, Yoshiyuki Yokoyama, Haruyuki Nishijima
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Patent number: 10240831Abstract: A power element has a closed space provided between a first diaphragm and a second diaphragm. An interposing member is interposed between the first diaphragm and the second diaphragm. Accordingly, a size of the closed space can be optionally determined in accordance with a shape such as a thickness of the interposing member. Therefore, limitations on the size of the closed space due to a shape of the first diaphragm and the second diaphragm can be reduced. Accordingly, limitations on the size of a fluid enclosing space due to a shape of a diagram can be reduced.Type: GrantFiled: September 2, 2014Date of Patent: March 26, 2019Assignee: DENSO CORPORATIONInventors: Shigeki Ito, Ryu Fukushima, Hiromi Ohta
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Patent number: 9726407Abstract: A temperature sensitive rod is communicated with a diaphragm that is displaceable in response to a pressure difference between an internal pressure of a sealed space, in which a temperature sensitive medium is sealed, and a pressure of a low pressure refrigerant outputted from an evaporator. A blind hole, which opens to the sealed space, is formed in an inside of the temperature sensitive rod. The temperature sensitive medium is a mixture gas of the refrigerant and an inert gas. A mixing ratio of the inert gas in the temperature sensitive medium corresponds to a ratio of an equivalent diameter of the blind hole relative to a depth of the blind hole in such a manner that a time constant of heat conduction from the temperature sensitive rod to the temperature sensitive medium is kept within a desired time constant range.Type: GrantFiled: December 5, 2012Date of Patent: August 8, 2017Assignee: DENSO CORPORATIONInventors: Hiroshi Oshitani, Teruyuki Hotta, Syuichi Mizuno, Ryu Fukushima, Shigeji Ohishi
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Publication number: 20170211850Abstract: An ejector refrigeration cycle includes a bypass passage that guides a refrigerant on an outlet side of an evaporator drawn from a refrigerant suction port of an ejector to a suction port side of a compressor while bypassing a diffuser passage of the ejector. A differential pressure regulating valve is disposed as a bypass flow-rate adjustment device that adjusts a bypass flow rate of the refrigerant circulating though the bypass passage. An enlarged portion for gradually enlarging the passage area is formed at a most downstream part of the refrigerant flow in the bypass passage. During a low-load operation, the differential pressure regulating valve increases the bypass flow rate, thereby allowing the refrigerant to flow into the evaporator connected to the upstream side of a refrigerant suction port using the suction effect of the compressor.Type: ApplicationFiled: July 14, 2015Publication date: July 27, 2017Applicant: DENSO CORPORATIONInventors: Ryu FUKUSHIMA, Yoshiyuki YOKOYAMA, Haruyuki NISHIJIMA
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Publication number: 20160223232Abstract: A power element has a closed space provided between a first diaphragm and a second diaphragm. An interposing member is interposed between the first diaphragm and the second diaphragm. Accordingly, a size of the closed space can be optionally determined in accordance with a shape such as a thickness of the interposing member. Therefore, limitations on the size of the closed space due to a shape of the first diaphragm and the second diaphragm can be reduced. Accordingly, limitations on the size of a fluid enclosing space due to a shape of a diagram can be reduced.Type: ApplicationFiled: September 2, 2014Publication date: August 4, 2016Applicant: DENSO CORPORATIONInventors: Shigeki ITO, Ryu FUKUSHIMA, Hiromi OHTA
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Publication number: 20150013368Abstract: A temperature sensitive rod is communicated with a diaphragm that is displaceable in response to a pressure difference between an internal pressure of a sealed space, in which a temperature sensitive medium is sealed, and a pressure of a low pressure refrigerant outputted from an evaporator. A blind hole, which opens to the sealed space, is formed in an inside of the temperature sensitive rod. The temperature sensitive medium is a mixture gas of the refrigerant and an inert gas. A mixing ratio of the inert gas in the temperature sensitive medium corresponds to a ratio of an equivalent diameter of the blind hole relative to a depth of the blind hole in such a manner that a time constant of heat conduction from the temperature sensitive rod to the temperature sensitive medium is kept within a desired time constant range.Type: ApplicationFiled: December 5, 2012Publication date: January 15, 2015Applicant: DENSO CORPORATIONInventors: Hiroshi Oshitani, Teruyuki Hotta, Syuichi Mizuno, Ryu Fukushima, Shigeji Ohishi