Patents by Inventor Yukio Imai
Yukio Imai 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: 20240154562Abstract: A motor drive device which drives a motor including a winding set and a winding set that are electrically separate from each other includes an inverter that outputs three-phase alternating currents to winding set, an inverter that outputs three-phase alternating currents to winding set, and controllers that output drive commands to inverter and inverter by generating PWM pulses. Controllers generate the PWM pulses such that the three-phase alternating currents that are output from inverter to winding set and the three-phase alternating currents that are output from inverter to winding set have reverse polarities in three respective phases.Type: ApplicationFiled: December 27, 2021Publication date: May 9, 2024Applicant: HITACHI ASTEMO, LTD.Inventors: Yukio HATTORI, Hirohito IMAI
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Publication number: 20240145456Abstract: According to one embodiment, a semiconductor device includes: a first insulating element and a second insulating element each controlled based on a control signal; a first control circuit configured to control selection of one of the first insulating element and the second insulating element based on the control signal; a first switch element; a second switch element; a second control circuit configured to control the first switch element based on an output of the first insulating element; and a third control circuit configured to control the second switch element based on an output of the second insulating element.Type: ApplicationFiled: August 29, 2023Publication date: May 2, 2024Inventors: Yuichiro NIIKURA, Yukio TSUNETSUGU, Hitoshi IMAI
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Patent number: 10434265Abstract: A medical hollow needle assembly includes an outer cylindrical body including a through-hole; a hollow needle having an outer peripheral surface, wherein a proximal portion of the hollow needle is disposed in the through-hole of the outer cylindrical body, and wherein the outer peripheral surface of the hollow needle has an outer reduced-diameter surface that has a smaller outer diameter than that of a more proximal portion of the outer peripheral surface of the hollow needle; and an inner cylindrical body including an insertion hole in which the hollow needle is disposed, wherein the inner cylindrical body is disposed between the hollow needle and an inner peripheral surface of the through-hole of the outer cylindrical body, and wherein the inner cylindrical body joins the outer cylindrical body and the hollow needle.Type: GrantFiled: March 9, 2016Date of Patent: October 8, 2019Assignee: TERUMO KABUSHIKI KAISHAInventors: Tetsuya Ooyauchi, Kenta Gotou, Yukio Imai, Hidenori Fujiwara, Madoka Horie, Hideo Kawamoto, Ayumi Kumagai
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Publication number: 20160184532Abstract: A medical hollow needle assembly includes an outer cylindrical body including a through-hole; a hollow needle having an outer peripheral surface, wherein a proximal portion of the hollow needle is disposed in the through-hole of the outer cylindrical body, and wherein the outer peripheral surface of the hollow needle has an outer reduced-diameter surface that has a smaller outer diameter than that of a more proximal portion of the outer peripheral surface of the hollow needle; and an inner cylindrical body including an insertion hole in which the hollow needle is disposed, wherein the inner cylindrical body is disposed between the hollow needle and an inner peripheral surface of the through-hole of the outer cylindrical body, and wherein the inner cylindrical body joins the outer cylindrical body and the hollow needle.Type: ApplicationFiled: March 9, 2016Publication date: June 30, 2016Applicant: TERUMO KABUSHIKI KAISHAInventors: Tetsuya OOYAUCHI, Kenta GOTOU, Yukio IMAI, Hidenori FUJIWARA, Madoka HORIE, Hideo KAWAMOTO, Ayumi KUMAGAI
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Patent number: 8387347Abstract: A process for producing a catheter comprises mixing ETFE and PTFE in a mass ratio of from 99:1 to 45:55 to form a mixture, forming the mixture into a tubular body, forming a reinforcement layer and a resin layer on said tubular body to form a catheter configured to be positioned in a lumen of a living body, sealingly packaging the catheter to produce a packaged catheter, and sterilizing the packaged catheter with electron beam irradiation.Type: GrantFiled: May 27, 2010Date of Patent: March 5, 2013Assignee: Terumo Kabushiki KaishaInventors: Yukio Imai, Takashi Suzuki
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Publication number: 20120324880Abstract: The present invention provides an apparatus for electrically and hydraulically driving a hydraulic cylinder, including a hydraulic pump rotatable in opposite directions, an electric motor for driving the hydraulic pump, a reservoir tank containing hydraulic fluid therein, and a servo-valve. The hydraulic cylinder makes fluid-communication at a head-sided hydraulic chamber with a first port of the hydraulic pump, and makes fluid-communication at a rod-sided hydraulic chamber with a second port of the hydraulic pump. The servo-valve allows ones of the head-sided hydraulic chamber and the rod-sided hydraulic chamber to make fluid-communication to the reservoir tank in accordance with a direction in which the hydraulic pump rotates, and varies a degree at which one of the head-sided hydraulic chamber and the rod-sided hydraulic chamber makes fluid-communication with the reservoir tank, to a designated degree.Type: ApplicationFiled: June 23, 2011Publication date: December 27, 2012Inventors: Norihiro Kuzuu, Kenta Miyazaki, Yukio Imai, Toshiharu Kubota
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Publication number: 20120316542Abstract: A medical device in which a part to be secondarily shaped comprises a molded silicone rubber article is subjected to heatless shaping by irradiation with electron-rays. The irradiation with electron-rays enables shaping and, furthermore, sterilization under some conditions. In a medical device comprising a part in which at least a silicone rubber is used and the mechanical properties of the silicone rubber preferentially appear, the shape of the above-described part upon molding is deformed with the use of a correcting member to a level exceeding the desired deformed shape and maintained in this state. Next, electron-ray irradiation is conducted in this state and then the correcting member is eliminated. Thus, the desired deformed shape intermediate between the shape upon the molding and the shape upon the electron-ray irradiation can be obtained.Type: ApplicationFiled: August 13, 2012Publication date: December 13, 2012Applicant: Terumo Kabushiki KaishaInventors: Koichi HAYAKAWA, Yukio Imai, Shingo Ishii
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Patent number: 8268225Abstract: A medical device in which a part to be secondarily shaped comprises a molded silicone rubber article is subjected to heatless shaping by irradiation with electron-rays. The irradiation with electron-rays enables shaping and, furthermore, sterilization under some conditions. In a medical device comprising a part in which at least a silicone rubber is used and the mechanical properties of the silicone rubber preferentially appear, the shape of the above-described part upon molding is deformed with the use of a correcting member to a level exceeding the desired deformed shape and maintained in this state. Next, electron-ray irradiation is conducted in this state and then the correcting member is eliminated. Thus, the desired deformed shape intermediate between the shape upon the molding and the shape upon the electron-ray irradiation can be obtained.Type: GrantFiled: September 27, 2010Date of Patent: September 18, 2012Assignee: Terumo Kabushiki KaishaInventors: Koichi Hayakawa, Yukio Imai, Shingo Ishii
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Patent number: 8096976Abstract: A valve body is formed from an elastic member in the form of an elliptic or circular film (disk shape) having an upper face and a lower face. The valve body has an opening and closing section which is opened and closed in response to insertion and pulling out of a dilator and is formed from a first slit, a second slit, a second concave portion and two third concave portions. A pair of ribs and six projections are formed on the lower face side of the valve body. The ribs are disposed in opposing relationship to each other with the second slit interposed therebetween and extend along the lower face. Further, the projections are disposed such that they are positioned on the inner side of the ribs and are opposed to each other with the second slit interposed therebetween.Type: GrantFiled: March 26, 2010Date of Patent: January 17, 2012Assignee: Terumo Kabushiki KaishaInventors: Tsutomu Sugiki, Masaaki Kasai, Yukio Imai, Shingo Ishii
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Patent number: 8016791Abstract: A valve body formed from an elastic member in the form of an elliptical or circular film (disk shape) has upper and lower surfaces. A first concave portion is formed on the upper surface side of the valve body. The valve body further has an opening and closing section which is opened and closed in response to insertion and pulling out of a dilator and is formed from a first slit, a second slit, a second concave portion and two third concave portions. The second concave portion is formed at a portion of the concave surface side of the valve body corresponding to an intersecting portion, and the third concave portions are formed at the opposite end portions of the first slit. The second concave portion extends, in a thickness wise direction of the valve body, to an intermediate portion of the first slit but not to the second slit.Type: GrantFiled: March 26, 2010Date of Patent: September 13, 2011Assignee: Terumo Kabushiki KaishaInventors: Tsutomu Sugiki, Masaaki Kasai, Yukio Imai, Shingo Ishii
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Publication number: 20110071501Abstract: A medical device in which a part to be secondarily shaped comprises a molded silicone rubber article is subjected to heatless shaping by irradiation with electron-rays. The irradiation with electron-rays enables shaping and, furthermore, sterilization under some conditions. In a medical device comprising a part in which at least a silicone rubber is used and the mechanical properties of the silicone rubber preferentially appear, the shape of the above-described part upon molding is deformed with the use of a correcting member to a level exceeding the desired deformed shape and maintained in this state. Next, electron-ray irradiation is conducted in this state and then the correcting member is eliminated. Thus, the desired deformed shape intermediate between the shape upon the molding and the shape upon the electron-ray irradiation can be obtained.Type: ApplicationFiled: September 27, 2010Publication date: March 24, 2011Applicant: Terumo Kabushiki KaishaInventors: Koichi HAYAKAWA, Yukio Imai, Shingo Ishii
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Publication number: 20100251669Abstract: A process for producing a catheter comprises mixing ETFE and PTFE in a mass ratio of from 99:1 to 45:55 to form a mixture, forming the mixture into a tubular body, forming a reinforcement layer and a resin layer on said tubular body to form a catheter configured to be positioned in a lumen of a living body, sealingly packaging the catheter to produce a packaged catheter, and sterilizing the packaged catheter with electron beam irradiation.Type: ApplicationFiled: May 27, 2010Publication date: October 7, 2010Applicant: TERUMO KABUSHIKI KAISHAInventors: Yukio Imai, Takashi Suzuki
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Publication number: 20100185153Abstract: A valve body is formed from an elastic member in the form of an elliptic or circular film (disk shape) having an upper face and a lower face. The valve body has an opening and closing section which is opened and closed in response to insertion and pulling out of a dilator and is formed from a first slit, a second slit, a second concave portion and two third concave portions. A pair of ribs and six projections are formed on the lower face side of the valve body. The ribs are disposed in opposing relationship to each other with the second slit interposed therebetween and extend along the lower face. Further, the projections are disposed such that they are positioned on the inner side of the ribs and are opposed to each other with the second slit interposed therebetween.Type: ApplicationFiled: March 26, 2010Publication date: July 22, 2010Applicant: TERUMO KABUSHIKI KAISHAInventors: Tsutomu SUGIKI, Masaaki Kasai, Yukio Imai, Shingo Ishii
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Publication number: 20100179480Abstract: A valve body formed from an elastic member in the form of an elliptical or circular film (disk shape) has upper and lower surfaces. A first concave portion is formed on the upper surface side of the valve body. The valve body further has an opening and closing section which is opened and closed in response to insertion and pulling out of a dilator and is formed from a first slit, a second slit, a second concave portion and two third concave portions. The second concave portion is formed at a portion of the concave surface side of the valve body corresponding to an intersecting portion, and the third concave portions are formed at the opposite end portions of the first slit. The second concave portion extends, in a thickness wise direction of the valve body, to an intermediate portion of the first slit but not to the second slit.Type: ApplicationFiled: March 26, 2010Publication date: July 15, 2010Applicant: TERUMO KABUSHIKI KAISHAInventors: Tsutomu Sugiki, Masaaki Kasai, Yukio Imai, Shingo Ishii
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Publication number: 20080119825Abstract: A catheter having a catheter layer composed of a composition containing ETFE and PTFE in a weight ratio of 99:1 to 45:55, wherein there is got a luminal internal surface consisting of a material that exhibits lubricity substantially identical with that of PTFE and has a resistance to radioactive rays not had by PTFE.Type: ApplicationFiled: January 20, 2006Publication date: May 22, 2008Applicant: TERUMO KABUSHIKI KAISHAInventors: Yukio Imai, Takashi Suzuki
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Patent number: 5426978Abstract: The flaw detecting apparatus comprises a sensor head including a first sensor for detecting the center of the center hole and a second sensor for detecting a flaw. A driver moves the sensor head along a first line passing through the center hole and then along a second line passing through the center of the center hole and perpendicular to the first line, thereby placing the sensor head at a position facing the center hole, on the basis of the output of the first sensor. Subsequently, the driver rotates the sensor head to a predetermined position where a flaw is detected, on the basis of the output of the second sensor.Type: GrantFiled: October 5, 1993Date of Patent: June 27, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Yukio Imai
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Patent number: 5227429Abstract: A poly(arylene sulfide) resin composition comprised of 100 parts by weight of a resin mixture of (A) 50 to 98% by weight of a heat-treated poly(arylene sulfide) such as heat-treated polyphenylene sulfide and (B) 50 to 2% by weight of a styrene/butadiene/styrene block copolymer elastomer or a modified product thereof, and 0.2 to 10 parts by weight of an aromatic maleimide compound represented by the formula (1): ##STR1## wherein R.sub.1 is a phenylene-containing radical, or the formula (2): ##STR2## wherein R.sub.2 is alkylene and n is 0, 1 or 2. The resin composition has a good impact resistance, elongation and flexibility.Type: GrantFiled: November 21, 1991Date of Patent: July 13, 1993Assignee: Tohpren Co., Ltd.Inventors: Takashi Kawamura, Yukio Imai, Kazuhiro Kawamata, Takayuki Okada, Junichiro Furuta
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Patent number: 4166789Abstract: A magnetic separator comprising a feed hopper for a raw material to be separated, chutes for separating and discharging respectively the concentrate and the tailing magnetically separated from each other, a rotary drum incorporated in the casing and having separation walls of a non-magnetic material disposed on both sides thereof and forming therebetween at least one feed separation passageway extending from the feed hopper on the rotation side of the rotary drum up to the discharge shoots, and series of stationary magnetic poles disposed at the back of both of the separation walls.Type: GrantFiled: May 30, 1978Date of Patent: September 4, 1979Assignee: Kobe Steel, Ltd.Inventors: Yukio Imai, Kunio Takeda, Jiro Terukina