Patents by Inventor Mineyasu Oana
Mineyasu Oana 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: 20170298951Abstract: A compressor includes an impeller including blades extending along a shroud. Each of the blades includes a leading edge, a trailing edge, and a tip edge connecting the leading edge and the trailing edge and opposing the shroud. The tip edge has a central curve extending along a center of a thickness of the tip edge from the leading edge to the trailing edge. The central curve has a tangential line touching a contact in the central curve. The tangential line has a tip edge inclination angle made by the rotation axis and the tangential line viewed in a reference direction which passes the contact and which is perpendicular to the rotation axis. The tip edge inclination angle increases as the contact approaches a first maximum inclination point in the central curve. The first maximum inclination point is separated from both the leading edge and the trailing edge.Type: ApplicationFiled: April 18, 2017Publication date: October 19, 2017Applicant: HONDA MOTOR CO., LTD.Inventors: Naoki ITOH, Mineyasu OANA, Naoki KUNO
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Patent number: 8038392Abstract: The effective efficiency of a centrifugal compressor can be improved by achieving a uniform distribution of fluid velocity across the outlet end of a fluid passage of an axial diffuser for the centrifugal compressor and a high static pressure recovery ratio Cp in the axial diffuser passage. The cross section of each axial diffuser passage is configured such that a relatively high velocity fluid flow in an upstream part of the diffuser passage is directed toward a negative pressure side of a cross section thereof. It can be accomplished by directing a minor axis of a cross section of the diffuser passage substantially perpendicularly to a direction directed from a center of the cross section of the diffuser passage to the central axial line of an impeller or directing the minor axis toward the central axial line of the impeller.Type: GrantFiled: July 18, 2008Date of Patent: October 18, 2011Assignee: Honda Motor Co., Ltd.Inventors: Shuichi Honda, Mineyasu Oana, Hidehiko Nakata, Naoki Kuno
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Patent number: 7658061Abstract: To provide a gas turbine engine which is simple in structure but can effectively remove foreign matters from the combustion air. The intake passage 21 includes an inlet portion 29, a curved portion 30 and a reduced diameter portion 31. The bypass duct 24 is curved away from the central axial line CL in a region corresponding to the curved portion 30 and reduced diameter portion 31 of the intake passage 29. Between the intake passage 29 and bypass duct 24 is defined an annular space 32. In the reduced diameter portion 31, the outer liner 20 is formed with a large number of foreign matter introduction openings 33 in a circumferential arrangement for communication between the intake passage 21 and annular space 32. The inner casing 4 is formed with a plurality of foreign matter ejection holes 34 in a circumferential arrangement in a part thereof that curves outward for communication between the annular space 32 and bypass duct 24.Type: GrantFiled: August 31, 2005Date of Patent: February 9, 2010Assignee: Honda Motor Co., LtdInventors: Osamu Kawamoto, Hiroki Nagata, Masayuki Fukutani, Mineyasu Oana
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Publication number: 20090022586Abstract: The effective efficiency of a centrifugal compressor can be improved by achieving a uniform distribution of fluid velocity across the outlet end of a fluid passage of an axial diffuser for the centrifugal compressor and a high static pressure recovery ratio Cp in the axial diffuser passage. The cross section of each axial diffuser passage is configured such that a relatively high velocity fluid flow in an upstream part of the diffuser passage is directed toward a negative pressure side of a cross section thereof. It can be accomplished by directing a minor axis of a cross section of the diffuser passage substantially perpendicularly to a direction directed from a center of the cross section of the diffuser passage to the central axial line of an impeller or directing the minor axis toward the central axial line of the impeller.Type: ApplicationFiled: July 18, 2008Publication date: January 22, 2009Inventors: Shuichi Honda, Mineyasu Oana, Hidehiko Nakata, Naoki Kuno
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Patent number: 7437877Abstract: A compressor having a front fan, which rotates to compress intake air, a single-stage low-pressure compressor which is disposed behind the front fan to compress intake air, and a single-stage high-pressure compressor which compresses the compressed air compressed by the low-pressure compressor; a ratio (RH/RL) of a pressure ratio (RH) of the high-pressure compressor to a pressure ratio (RL) of the low-pressure compressor is within a range of 4.5 to 6.0.Type: GrantFiled: February 11, 2005Date of Patent: October 21, 2008Assignee: Honda Motor Co., Ltd.Inventors: Osamu Kawamoto, Mineyasu Oana
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Publication number: 20070144139Abstract: [Object] To provide a gas turbine engine which is simple in structure but can effectively remove foreign matters from the combustion air. [Means] The intake passage 21 includes an inlet portion 29, a curved portion 30 and a reduced diameter portion 31. The bypass duct 24 is curved away from the central axial line CL in a region corresponding to the curved portion 30 and reduced diameter portion 31 of the intake passage 29. Between the intake passage 29 and bypass duct 24 is defined an annular space 32. In the reduced diameter portion 31, the outer liner 20 is formed with a large number of foreign matter introduction openings 33 in a circumferential arrangement for communication between the intake passage 21 and annular space 32. The inner casing 4 is formed with a plurality of foreign matter ejection holes 34 in a circumferential arrangement in a part thereof that curves outward for communication between the annular space 32 and bypass duct 24.Type: ApplicationFiled: August 31, 2005Publication date: June 28, 2007Inventors: Osamu Kawamoto, Hiroki Nagata, Masayuki Fukutani, Mineyasu Oana
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Patent number: 7219651Abstract: A throttle valve for adjusting an amount of intake air to an internal combustion engine includes throttle shafts disposed in an intake air passage perpendicularly across the longitudinal axis of the air passage, and first and second valve members mounted on the throttle shafts for opening/closing about the throttle shafts independently of each other. By these first and second valve members, there are formed main air passages for causing air to flow in the intake air passage along the longitudinal axis of the intake air passage toward the internal combustion engine and auxiliary intake air passages for causing air to flow in the intake air passage substantially perpendicularly across the longitudinal axis of the air passage.Type: GrantFiled: July 19, 2005Date of Patent: May 22, 2007Assignee: Honda Motor Co., Ltd.Inventors: Seiji Yamamoto, Mineyasu Oana
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Publication number: 20060016426Abstract: A throttle valve for adjusting an amount of intake air to an internal combustion engine includes throttle shafts disposed in an intake air passage perpendicularly across the longitudinal axis of the air passage, and first and second valve members mounted on the throttle shafts for opening/closing about the throttle shafts independently of each other. By these first and second valve members, there are formed main air passages for causing air to flow in the intake air passage along the longitudinal axis of the intake air passage toward the internal combustion engine and auxiliary intake air passages for causing air to flow in the intake air passage substantially perpendicularly across the longitudinal axis of the air passage.Type: ApplicationFiled: July 19, 2005Publication date: January 26, 2006Inventors: Seiji Yamamoto, Mineyasu Oana
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Publication number: 20050178105Abstract: A compressor having a front fan, which rotates to compress intake air, a single-stage low-pressure compressor which is disposed behind the front fan to compress intake air, and a single-stage high-pressure compressor which compresses the compressed air compressed by the low-pressure compressor; a ratio (RH/RL) of a pressure ratio (RH) of the high-pressure compressor to a pressure ratio (RL) of the low-pressure compressor is within a range of 4.5 to 6.0.Type: ApplicationFiled: February 11, 2005Publication date: August 18, 2005Inventors: Osamu Kawamoto, Mineyasu Oana
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Patent number: 6905310Abstract: In an impeller for centrifugal compressors comprising a plurality of blades each having a base end attached to a central hub, each of the blades is given with a thickness which increases progressively toward a hub end thereof, and a suction surface side of the blade is given with a greater thickness increase rate with respect to a neutral plane than a pressure surface side of the blade. Thereby, the inter-blade channel is narrowed locally in the region near the hub end of the suction surface of each blade, and this locally reduces the aerodynamic loading on the blade. In particular, the surge property is improved, and the generation of radially outwardly directed secondary flows can be minimized. This allows the distribution of aerodynamic loading in the radial direction or from the tip end to the hub end of each blade to be controlled at will, and enables the optimum design of the impeller.Type: GrantFiled: July 2, 2003Date of Patent: June 14, 2005Assignee: Honda Giken Kogyo Kabushiki KaishaiInventors: Osamu Kawamoto, Mineyasu Oana
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Publication number: 20040005220Abstract: In an impeller for centrifugal compressors comprising a plurality of blades each having a base end attached to a central hub, each of the blades is given with a thickness which increases progressively toward a hub end thereof, and a suction surface side of the blade is given with a greater thickness increase rate with respect to a neutral plane than a pressure surface side of the blade. Thereby, the inter-blade channel is narrowed locally in the region near the hub end of the suction surface of each blade, and this locally reduces the aerodynamic loading on the blade. In particular, the surge property is improved, and the generation of radially outwardly directed secondary flows can be minimized. This allows the distribution of aerodynamic loading in the radial direction or from the tip end to the hub end of each blade to be controlled at will, and enables the optimum design of the impeller.Type: ApplicationFiled: July 2, 2003Publication date: January 8, 2004Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Osamu Kawamoto, Mineyasu Oana