Patents by Inventor Kazuaki Takahara
Kazuaki Takahara 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: 11979072Abstract: A magnetic geared motor includes a stator including a plurality of teeth that produce a magnetomotive force, a first rotor that rotates by the magnetomotive force of the stator, and a second rotor that, in response to rotation of the first rotor, rotates at a lower speed than the first rotor. The first rotor, the second rotor, and the stator are disposed coaxial to each other, and a plurality of magnets of different polarities are disposed in respective slot openings present between each two adjacent teeth.Type: GrantFiled: January 21, 2020Date of Patent: May 7, 2024Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Hajime Ukaji, Noritaka Aso, Katsuhiro Hirata, Noboru Niguchi, Kazuaki Takahara, Hironori Suzuki, Tsubasa Kamigaki
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Publication number: 20240120817Abstract: A permanent magnet-type rotary electric machine includes a stator, a first rotor, and a second rotor. The stator includes a stator core, a plurality of stator teeth, a plurality of stator slots, a plurality of stator magnets, and a stator coil. The first rotor is disposed inside the stator core relative to the plurality of stator magnets. The second rotor is disposed inside the stator core relative to a plurality of first pole pieces. The second rotor includes a plurality of second pole pieces. A proportion of the number of the plurality of stator slots to the number of poles of the plurality of second pole pieces of the second rotor is greater than 1.25 and less than 1.5, or greater than 1.5 and less than 3.0.Type: ApplicationFiled: December 23, 2020Publication date: April 11, 2024Applicants: Mitsubishi Electric Corporation, OSAKA UNIVERSITYInventors: Haruyuki KOMETANI, Ryoji MIYATAKE, Takuro YAMADA, Kenji TANAKA, Katsuhiro HIRATA, Noboru NIGUCHI, Kazuaki TAKAHARA, Hironori SUZUKI, Takuya ITO
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Publication number: 20240097547Abstract: Provided is a magnetic strain wave gear device that makes it possible to achieve both improvement of the efficiency of assembly work and suppression of decrease in energy conversion efficiency. A magnetic strain wave gear device includes: a stator having a stator core, a stator winding, and a stator magnet; a first rotor; and a second rotor. The second rotor includes a second rotor core provided with a plurality of rotor magnet insertion holes and a plurality of rotor magnets inserted into the plurality of respective rotor magnet insertion holes. The first rotor includes a cylindrical first rotor core and a first rotor end plate. The first rotor end plate has a rotor magnet passage hole through which the rotor magnets can be inserted into the rotor insertion holes from outside in a direction of a rotation shaft.Type: ApplicationFiled: August 2, 2021Publication date: March 21, 2024Applicants: Mitsubishi Electric Corporation, OSAKA UNIVERSITYInventors: Yosuke UCHIDA, Ryoji MIYATAKE, Atsushi YAMAMOTO, Haruyuki KOMETANI, Noboru NIGUCHI, Katsuhiro HIRATA, Kazuaki TAKAHARA, Hironori SUZUKI, Takuya ITO
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Publication number: 20220052596Abstract: A magnetic geared motor (1) includes a stator (30) including a plurality of teeth (31) that produce a magnetomotive force, a first rotor (10) that rotates by the magnetomotive force of the stator (30), and a second rotor (20) that, in response to rotation of the first rotor (10), rotates at a lower speed than the first rotor (10). The first rotor (10), the second rotor (20), and the stator (30) are disposed coaxial to each other, and a plurality of magnets (34) of different polarities are disposed in respective slot openings (31c) present between each two adjacent teeth (31).Type: ApplicationFiled: January 21, 2020Publication date: February 17, 2022Inventors: Hajime Ukaji, Noritaka ASO, Katsuhiro HIRATA, Noboru NIGUCHI, Kazuaki TAKAHARA, Hironori SUZUKI, Tsubasa KAMIGAKI
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Publication number: 20220014079Abstract: A magnetic geared motor includes a stator, a first inner rotor that is disposed to an inner side of the stator and rotates by a magnetomotive force of the stator, a first center rotor disposed between the stator and the first inner rotor, a second center rotor disposed to an inner side of the first inner rotor, and a second inner rotor disposed to an inner side of the second center rotor. The stator, the first center rotor, the first inner rotor, the second center rotor, and the second inner rotor are disposed coaxial to each other, and the first inner rotor includes first outer magnetic pole pairs disposed in a circumferential direction and a plurality of first inner magnetic pole pairs disposed in the circumferential direction.Type: ApplicationFiled: February 6, 2020Publication date: January 13, 2022Inventors: Hajime UKAJI, Noritaka ASO, Katsuhiro HIRATA, Noboru NIGUCHI, Kazuaki TAKAHARA, Hironori SUZUKI, Tsubasa KAMIGAKI
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Patent number: 5102590Abstract: A method for the manufacture of a hollow fiber membrane by mixing polypropylene, an organic filler capable of uniformly dispersing in the polypropylene in a fused state and easily dissolving in an extractant being used, and a crystal seed forming agent. The resulting mixture, in a molten state, is discharged in the shape of a hollow fiber through an annular spinning nozzle and into contact with a liquid made of said organic filler or a compound similar thereto. This results in cooling and solidifying the hollow fiber, which is then forwarded into contact with an extractant incapable of dissolving polypropylene, to remove the organic filler and form the membrane.Type: GrantFiled: October 16, 1989Date of Patent: April 7, 1992Assignee: Terumo Kabushiki Kaisha, trading as Terumo CorporationInventors: Kazuaki Takahara, Kazuhiro Shimoda, Ken Tatebe, Manabu Yamazaki
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Patent number: 4824569Abstract: Unstretched hollow fibers of cuprammonium cellulose for dialysis possessing a film structure having a porosity of 15 to 25%, a pore diameter of 25 to 40 .ANG., and an ultrafiltration ratio of 3.0 to 5.5 ml/mmHg.hr.m.sup.2 are obtained by extruding, coagulating, and regenerating a cuprammonium cellulose spinning dope having a cellulose concentration of 6.8 to 8.7% and a viscosity of 500 to 1,300 poises (at 20.degree. C.).Type: GrantFiled: May 26, 1987Date of Patent: April 25, 1989Assignee: Terumo Kabushiki Kaisha Trading as Terumo CorporationInventors: Kazuhiko Suzuki, Kazuaki Takahara
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Patent number: 4770852Abstract: A porous polypropylene hollow fiber membrane of a circular cross section 150 to 300 .mu.m in inside diameter and 10 to 150 .mu.m in wall thickness for use in an artificial lung, which hollow fiber membrane is characterized by having an inner surface aperture ratio in the range of 10 to 30%, a porosity in the range of 10 to 60%, and an oxygen flux in the range of 100 to 1,000 liters/min.m.sup.2.atm. and inducing no leakage of blood plasma within 20 hours use in the external circulation of blood therethrough.Type: GrantFiled: July 10, 1986Date of Patent: September 13, 1988Assignee: Terumo Kabushiki KaishaInventors: Kazuaki Takahara, Kazuhiro Shimoda, Ken Tatebe, Manabu Yamazaki
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Patent number: 4708800Abstract: A porous hollow fiber membrane, comprising a polyolefin hollow fiber membrane of an annular cross section of substantial circle 150 to 300 .mu.m in inside diameter and 10 to 150 .mu.m in wall thickness, said hollow fiber membrane forming on the inner wall side thereof a tight layer of intimately bound fine polyolefin particles and on the outer wall side thereof a porous texture of fine polyolefin particles bound in chains and containing fine pores extended continuously form said inner wall side to said outer wall side.Type: GrantFiled: October 1, 1985Date of Patent: November 24, 1987Assignee: Terumo Kabushiki KaishaInventors: Toshiji Ichikawa, Kazuaki Takahara, Kazuhiro Shimoda, Yukio Seita, Makoto Emi
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Patent number: 4609464Abstract: A dialytic hollow fiber having an improved dialytic effect is disclosed which is characterized by having a wall thickness of 5 to 35 .mu.m and a truly circular cross section 50 to 500 .mu.m in outside diameter throughout the entire length and the entire circumference thereof, having a skin layer of not more than 300 .ANG. in thickness in the outer surface thereof, and containing substantially no voids in the inner surface thereof. This dialytic hollow fiber shows a permeation ratio of 20 to 40% to cytochrome C having an average molecular weight of 12,400 and a maximum fractional molecular weight of about 40,000 at an inhibition ratio of 95%, and an artificial kidney using said dialytic hollow fiber.Type: GrantFiled: October 9, 1984Date of Patent: September 2, 1986Assignee: Terumo Kabushiki KaishaInventors: Juuro Aoyagi, Kazuaki Takahara, Yukio Seita
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Patent number: 4444663Abstract: A liquid composition for the manufacture of a membrane, comprising a reaction product a cuprammonium cellulose with an ammonium or alkali metal salt of a polymer containing 10 to 70 equivalent percent of a carboxyl group and having a number-averaged molecular weight in the range of from 500 to 200,000, and a membrane is obtained by molding the composition in the form of a film, immersing the shaped article thus obtained in a dilute sulfuric acid solution thereby coagulating and regenerating it, subsequently immersing the shaped article in an strong alkali solution thereby expelling said ammonium or alkali metal salt of the polymer therefrom and forming therein fine pores substantially corresponding to the molecular weight of said salt.Type: GrantFiled: September 14, 1981Date of Patent: April 24, 1984Assignee: Terumo CorporationInventors: Juuro Aoyagi, Kazuhiko Suzuki, Kazuaki Takahara
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Patent number: 4444716Abstract: A method for the manufacture of a hollow fiber which comprises extruding a cellulosic spinning dope through an annular spinning nozzle directly into a non-coagulative liquid layer in a bath filled in the upper layer with a coagulative liquid relative to said spinning dope and in the lower layer with a non-coagulative liquid of a halogenated hydrocarbon and, at the same time, introducing a non-coagulative liquid relative to said spinning dope into the inner center of the tubularly extruded thread of spinning dope, and subsequently passing the resultant tubular fiber of spinning dope through said coagulative liquid thereby coagulating and regenerating the fiber.Type: GrantFiled: May 25, 1982Date of Patent: April 24, 1984Assignee: Terumo Kabushiki KaishaInventors: Juuro Aoyagi, Kazuaki Takahara, Yukio Seita