Patents by Inventor Ryusuke Hasegawa
Ryusuke Hasegawa 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: 9225205Abstract: An electrical rotating machine having a stator or a rotor with a core that includes a plurality of tapered pole pieces is a low loss electrical machine that results in improvements such as higher output power, higher torque and higher efficiency than a machine that does not have tapered pole pieces. The stator or the rotor with tapered pole pieces may be applied to a power train in automobiles, power tools, and various appliances. The core is constructed by winding an iron-based amorphous magnetic alloy ribbon to form a cylinder-shaped core, then heating, impregnating with resin, and machining by cutting the cylinder-shaped core to form a plurality of tapered pole pieces being separated in an alternating manner by a plurality of slots. The cores having an outside diameter of 50 mm-1200 mm, a tapered angle of 10°-45°, and a slot depth of 10 mm-210 mm are advantageous.Type: GrantFiled: January 25, 2013Date of Patent: December 29, 2015Assignee: GLASSY METAL TECHNOLOGIES LTD.Inventors: John Andrew Gayler, Stephen Robert Kloeden, Nesimi Ertugrul, Ryusuke Hasegawa
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Patent number: 8974609Abstract: A ferromagnetic amorphous alloy ribbon includes an alloy having a composition represented by FeaSibBcCd where 80.5?a?83 at. %, 0.5?b?6 at. %, 12?c?16.5 at. %, 0.01?d?1 at. % with a+b+c+d=100 and incidental impurities, the defect length along a direction of the ribbon's length being between 5 mm and 200 mm, the defect depth being less than 0.4×t ?m and the defect occurrence frequency being less than 0.05×w times within 1.5 m of ribbon length, where t and w are ribbon thickness and ribbon width, respectively, and the ribbon in its annealed state and straight strip form of the ribbon, has a saturation magnetic induction exceeding 1.60 T, and exhibits a magnetic core loss of less than 0.14 W/kg when measured at 60 Hz and at 1.3 T induction level. The ribbon is suitable for use in transformer cores, rotational machines, electrical chokes, magnetic sensors and pulse power devices.Type: GrantFiled: August 31, 2010Date of Patent: March 10, 2015Assignees: Metglas, Inc., Hitachi Metals, Ltd.Inventors: Yuichi Ogawa, Eric A. Theisen, Yuji Matsumoto, James Perrozi, Ryusuke Hasegawa
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Patent number: 8968490Abstract: A ferromagnetic amorphous alloy ribbon includes an alloy having a composition represented by FeaSibBcCd where 80.5?a?83 at. %, 0.5?b?6 at. %, 12?c?16.5 at. %, 0.01?d?1 at. % with a+b+c+d=100 and incidental impurities, the ribbon being cast from a molten state of the alloy with a molten alloy surface tension of greater than or equal to 1.1 N/m on a chill body surface; the ribbon having a ribbon length, a ribbon thickness, and a ribbon surface facing the chill body surface; the ribbon having ribbon surface protrusions being formed on the ribbon surface facing the chill body surface; the ribbon surface protrusions being measured in terms of a protrusion height and a number of protrusions; the protrusion height exceeding 3 ?m and less than four times the ribbon thickness, and the number of protrusions being less than 10 within 1.5 m of the cast ribbon length; and the alloy ribbon in its annealed straight strip form having a saturation magnetic induction exceeding 1.Type: GrantFiled: September 9, 2010Date of Patent: March 3, 2015Assignees: Metglas, Inc., Hitachi Metals, Ltd.Inventors: Eric A. Theisen, James Perrozi, Yuichi Ogawa, Yuji Matsumoto, Daichi Azuma, Ryusuke Hasegawa
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Patent number: 8968489Abstract: A ferromagnetic amorphous alloy ribbon, a method of fabricating a ribbon and a wound transformer core are provided. The ribbon includes an alloy of FeaSibBcCd where 80.5?a?83 at. %, 0.5?b?6 at. %, 12?c?16.5 at. %, 0.01?d?1 at. % with a+b+c+d=100, and is cast from a molten state of the alloy, having a-surface tension of greater than or equal to 1.1 N/mi,. A defect length along a direction of the ribbon's length is between 5 mm and 200 mm, a defect depth less than 0.4 ×t ?m and a defect occurrence frequency less than 0.05 ×w times within 1.5 m of ribbon length, where t is the ribbon thickness and w is the ribbon width in mm. The ribbon has a saturation magnetic induction exceeding 1.60 T and a magnetic core loss of less than 0.14 W/kg when measured at 60 Hz and at 1.3 T induction level in an annealed straight strip form, and a core magnetic loss of less than 0.3 W/kg and an exciting power of less than 0.Type: GrantFiled: August 31, 2010Date of Patent: March 3, 2015Assignees: Metglas, Inc., Hitachi Metals, Ltd.Inventors: Daichi Azuma, Ryusuke Hasegawa, Yuichi Ogawa, Eric A. Theisen, Yuji Matsumoto
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Patent number: 8726490Abstract: An electrical rotating machine having a stator or a rotor with a core that includes a plurality of tapered pole pieces is a low loss electrical machine that results in improvements such as higher output power, higher torque and higher efficiency than a machine that does not have tapered pole pieces. The stator or the rotor with tapered pole pieces may be applied to a power train in automobiles, power tools, and various appliances. A method of constructing the core includes winding an iron-based amorphous magnetic alloy ribbon to form a cylinder-shaped core, then heating, impregnating with resin, and machining the cylinder-shaped core to form a plurality of tapered pole pieces being separated in an alternating manner by a plurality of slots. The cores having an outside diameter in a range of 50 mm-1200 mm, a tapered angle in a range of 10°-45°, and a slot depth in a range of 10 mm-210 mm are advantageous.Type: GrantFiled: August 18, 2011Date of Patent: May 20, 2014Assignee: Glassy Metal Technologies Ltd.Inventors: John Andrew Gayler, Stephen Robert Kloeden, Nesimi Ertugrul, Ryusuke Hasegawa
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Patent number: 8663399Abstract: An iron-based amorphous alloy and magnetic core with an iron-based amorphous alloy having a chemical composition with a formula FeaBbSicCd, where 81<a?84, 10?b?18, 0<c?5 and 0<d<1.5, numbers being in atomic percent, with incidental impurities, simultaneously have a value of a saturation magnetic induction exceeding 1.6 tesla, a Curie temperature of at least 300° C. and a crystallization temperature of at least 400° C. When cast in a ribbon form, such an amorphous metal alloy is ductile and thermally stable, and is suitable for various electric devices because of high magnetic stability at such devices' operating temperatures.Type: GrantFiled: December 30, 2005Date of Patent: March 4, 2014Assignees: Metglas, Inc., Hitachi Metals, Ltd.Inventors: Ryusuke Hasegawa, Daichi Azuma, Yoshihito Yoshizawa, Yuichi Ogawa
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Publication number: 20130106559Abstract: An amorphous alloy-based magnetic core with reduced audible noise and a method of making the amorphous alloy-based magnetic core emanating low audible noise, including: placing the core with multiple layers of high strength tape on the core legs, wherein the tapes have a high tensile strength, high dielectric strength and high service temperature, resulting in reduced level of audible noise. When operated under optimum condition, the reduced level of audible noise is 6-10 dB less when compared with a same-size core that has been coated with resin instead.Type: ApplicationFiled: October 28, 2011Publication date: May 2, 2013Applicant: METGLAS, INC.Inventors: Mark Robert Columbus, Robert Brown, Kengo Takahashi, Ryusuke Hasegawa
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Patent number: 8427272Abstract: An amorphous alloy-based magnetic core with reduced audible noise and a method of making the amorphous alloy-based magnetic core emanating low audible noise, including: placing the core with multiple layers of high strength tape on the core legs, wherein the tapes have a high tensile strength, high dielectric strength and high service temperature, resulting in reduced level of audible noise. When operated under optimum condition, the reduced level of audible noise is 6-10 dB less when compared with a same-size core that has been coated with resin instead.Type: GrantFiled: October 28, 2011Date of Patent: April 23, 2013Assignee: Metglas, Inc.Inventors: Mark Robert Columbus, Robert Brown, Kengo Takahashi, Ryusuke Hasegawa
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Publication number: 20130043744Abstract: An electrical rotating machine having a stator or a rotor with a core that includes a plurality of tapered pole pieces is a low loss electrical machine that results in improvements such as higher output power, higher torque and higher efficiency than a machine that does not have tapered pole pieces. The stator or the rotor with tapered pole pieces may be applied to a power train in automobiles, power tools, and various appliances. A method of constructing the core includes winding an iron-based amorphous magnetic alloy ribbon to form a cylinder-shaped core, then heating, impregnating with resin, and machining the cylinder-shaped core to form a plurality of tapered pole pieces being separated in an alternating manner by a plurality of slots. The cores having an outside diameter in a range of 50 mm-1200 mm, a tapered angle in a range of 10°-45°, and a slot depth in a range of 10 mm-210 mm are advantageous.Type: ApplicationFiled: August 18, 2011Publication date: February 21, 2013Applicant: GLASSY METAL TECHNOLOGY LTD.Inventors: John Andrew GAYLER, Stephen Robert Kloeden, Nesimi Ertugrul, Ryusuke Hasegawa
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Patent number: 8372217Abstract: A magnetic core having an iron-based amorphous alloy that includes: a chemical composition with a formula FeaBbSicCd, where 81.5<a?84, 12<b<17, 1?c<5 and 0.3?d?1.0, numbers being in atomic percent, with incidental impurities, simultaneously having a value of a saturation magnetic induction equal to or exceeding 1.63 tesla, a Curie temperature greater than or equal to 315° C. and less than or equal to 360° C. and a crystallization temperature greater than or equal to 400° C. and less than or equal to 470° C. The core has low core loss and exciting power and is suited for transformers, electrical chokes, power inductors and pulse generation and compression devices.Type: GrantFiled: December 31, 2009Date of Patent: February 12, 2013Assignees: Metglas, Inc., Hitachi Metals, Ltd.Inventors: Ryusuke Hasegawa, Daichi Azuma
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Patent number: 8366010Abstract: A magnetomechanical resonance element or marker strip with facilitated performance based on an amorphous magnetostrictive alloy ribbon having a line-like surface pattern is utilized in an electronic article surveillance marker or sensor element. A direction of magnetic anisotropy at angle between 80 and 90 degree away from ribbon's length direction and in ribbon's plane is introduced during ribbon fabrication, which increases the resonance performance with minimal loss in the magneto-mechanical circuit, and more particularly, in a marker or sensor element utilizing a plurality of resonating elements or marker strips. A marker or sensor element is fabricated utilizing the resonance element or elements and is utilized in an electronic article surveillance and identification systems.Type: GrantFiled: June 29, 2011Date of Patent: February 5, 2013Assignee: Metglas, Inc.Inventors: Ryusuke Hasegawa, Ronald Joseph Martis
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Publication number: 20130001314Abstract: A magnetomechanical resonance element or marker strip with facilitated performance based on an amorphous magnetostrictive alloy ribbon having a line-like surface pattern is utilized in an electronic article surveillance marker or sensor element. A direction of magnetic anisotropy at angle between 80 and 90 degree away from ribbon's length direction and in ribbon's plane is introduced during ribbon fabrication, which increases the resonance performance with minimal loss in the magneto-mechanical circuit, and more particularly, in a marker or sensor element utilizing a plurality of resonating elements or marker strips. A marker or sensor element is fabricated utilizing the resonance element or elements and is utilized in an electronic article surveillance and identification systems.Type: ApplicationFiled: June 29, 2011Publication date: January 3, 2013Applicant: Metglas, Inc.Inventors: Ryusuke HASEGAWA, Ronald Joseph Martis
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Publication number: 20120062351Abstract: A ferromagnetic amorphous alloy ribbon includes an alloy having a composition represented by FeaSibBcCd where 80.5?a?83 at. %, 0.5?b?6 at. %, 12?c?16.5 at. %, 0.01?d?1 at. % with a+b+c+d=100 and incidental impurities, the ribbon being cast from a molten state of the alloy with a molten alloy surface tension of greater than or equal to 1.1 N/m on a chill body surface; the ribbon having a ribbon length, a ribbon thickness, and a ribbon surface facing the chill body surface; the ribbon having ribbon surface protrusions being formed on the ribbon surface facing the chill body surface; the ribbon surface protrusions being measured in terms of a protrusion height and a number of protrusions; the protrusion height exceeding 3 ?m and less than four times the ribbon thickness, and the number of protrusions being less than 10 within 1.5 m of the cast ribbon length; and the alloy ribbon in its annealed straight strip form having a saturation magnetic induction exceeding 1.Type: ApplicationFiled: September 9, 2010Publication date: March 15, 2012Applicants: HITACHI METALS, LTD., METGLAS, INC.Inventors: Eric A. Theisen, James Perrozi, Yuichi Ogawa, Yuji Matsumoto, Daichi Azuma, Ryusuke Hasegawa
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Publication number: 20120049992Abstract: A ferromagnetic amorphous alloy ribbon includes an alloy having a composition represented by FeaSibBcCd where 80.5?a?83 at. %, 0.5?b?6 at. %, 12?c?16.5 at. %, 0.01?d?1 at. % with a+b+c+d=100 and incidental impurities; the ribbon being cast from a molten state of the alloy, with a molten alloy surface tension of greater than or equal to 1.1 N/m; the defect length along a direction of the ribbon's length being between 5 mm and 200 mm, the defect depth being less than 0.4×t ?m and the defect occurrence frequency being less than 0.05×w times within 1.5 m of ribbon length, where t is the ribbon thickness and w is the ribbon width, and the ribbon having a saturation magnetic induction exceeding 1.60 T and exhibiting a magnetic core loss of less than 0.14 W/kg when measured at 60 Hz and at 1.3 T induction level in an annealed straight strip form, and a core magnetic loss of less than 0.3 W/kg and an exciting power of less than 0.4 VA/kg in an annealed wound transformer core form.Type: ApplicationFiled: August 31, 2010Publication date: March 1, 2012Applicants: HITACHI METALS, LTD., METGLAS, INC.Inventors: Daichi Azuma, Ryusuke Hasegawa, Yuichi Ogawa, Eric A. Theisen, Yuji Matsumoto
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Publication number: 20120048428Abstract: A ferromagnetic amorphous alloy ribbon includes an alloy having a composition represented by FeaSibBcCd where 80.5?a?83 at. %, 0.5?b?6 at. %, 12?c?16.5 at. %, 0.01?d?1 at. % with a+b+c+d=100 and incidental impurities, the defect length along a direction of the ribbon's length being between 5 mm and 200 mm, the defect depth being less than 0.4×t ?m and the defect occurrence frequency being less than 0.05×w times within 1.5 m of ribbon length, where t and w are ribbon thickness and ribbon width, respectively, and the ribbon in its annealed state and straight strip form of the ribbon, has a saturation magnetic induction exceeding 1.60 T, and exhibits a magnetic core loss of less than 0.14 W/kg when measured at 60 Hz and at 1.3 T induction level. The ribbon is suitable for use in transformer cores, rotational machines, electrical chokes, magnetic sensors and pulse power devices.Type: ApplicationFiled: August 31, 2010Publication date: March 1, 2012Applicants: HITACHI METALS, LTD., METGLAS, INC.Inventors: Yuichi Ogawa, Eric A. Theisen, Yuji Matsumoto, James Perrozi, Ryusuke Hasegawa
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Patent number: 7985022Abstract: A device and method of remote temperature sensing, the device having a temperature sensor placeable on a rotating item utilizing the temperature sensor being a plurality of rectangular shaped amorphous magnetic alloy strips connected magnetically, wherein at least one of the strips has a predetermined ferromagnetic Curie temperature and another strip has a magnetic permeability exceeding 2,000.Type: GrantFiled: March 1, 2007Date of Patent: July 26, 2011Assignee: Metglas, Inc.Inventors: Daichi Azuma, Ryusuke Hasegawa
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Patent number: 7931400Abstract: A temperature sensor includes a plurality of rectangular shaped amorphous magnetic alloy strips connected magnetically, wherein at least one of the strips has a predetermined ferromagnetic Curie temperature, and another strip has a magnetic permeability well exceeding 2,000. The temperature sensor may be used in a related remote temperature sensing method wherein the sensor is interrogated by a magnetic field and the temperature sensor's response signal is detected electromagnetically.Type: GrantFiled: March 1, 2007Date of Patent: April 26, 2011Assignee: Metglas, Inc.Inventors: Ryusuke Hasegawa, Daichi Azuma
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Publication number: 20100175793Abstract: A magnetic core having an iron-based amorphous alloy that includes: a chemical composition with a formula FeaBbSicCd, where 81.5<a?84, 12<b<17, 1?c<5 and 0.3?d?1.0, numbers being in atomic percent, with incidental impurities, simultaneously having a value of a saturation magnetic induction equal to or exceeding 1.63 tesla, a Curie temperature greater than or equal to 315° C. and less than or equal to 360° C. and a crystallization temperature greater than or equal to 400° C. and less than or equal to 470° C. The core has low core loss and exciting power and is suited for transformers, electrical chokes, power inductors and pulse generation and compression devices.Type: ApplicationFiled: December 31, 2009Publication date: July 15, 2010Applicants: Metglas, Inc., Hitachi Metal, Ltd.Inventors: Ryusuke Hasegawa, Daichi Azuma
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Patent number: 7561043Abstract: A magnetomechanical resonance element or marker strip with facilitated performance based on an amorphous magnetostrictive alloy ribbon is utilized in an electronic article surveillance marker. A curvature along the element's length direction is introduced during ribbon fabrication with a different radius of curvature, which increases the resonance performance with minimal loss in the magneto-mechanical circuit, and more particularly, in a marker utilizing a plurality of resonating elements or marker strips. A marker is fabricated utilizing the resonance element or elements and is utilized in an electronic article surveillance system.Type: GrantFiled: December 4, 2006Date of Patent: July 14, 2009Assignee: Metglas, Inc.Inventors: Ryusuke Hasegawa, John Paul Webb, Auburn Anthony Chestnut, Larry Hill, Ronald Joseph Martis
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Patent number: 7541909Abstract: A filter circuit is used to select frequency bands of digital and analog signals over communications channels in a DSL communications system. The filter circuit includes an inductor having a core that consists essentially of an Fe-base amorphous metal alloy. Advantageously, the filter circuit provides as good or better performance than a filter circuit using a Co-base core; but is much less expensive. As such, it provides a low cost, high efficiency solution to communications applications, such as DSL communications systems, and the like.Type: GrantFiled: February 8, 2002Date of Patent: June 2, 2009Assignee: Metglas, Inc.Inventors: Ryusuke Hasegawa, Ronald J. Martis, Seshu V. Tatikola