Patents by Inventor Yoshinori Kurokawa
Yoshinori Kurokawa 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).
-
Patent number: 11936283Abstract: A gate driving power source device can be miniaturized by sharing power source units, and a large current can be prevented from locally flowing in a single chip even when a short-circuit failure occurs in a multi-phase conversion circuit included in a power conversion device. There is provided a shared power source unit supplying a shared DC power source to a gate drive circuit provided in any one of a plurality of lower arms of multi-phase conversion circuits or any one of a plurality of upper arms of the multi-phase conversion circuit and gate drive circuits provided in upper arms or lower arms of other conversion circuits.Type: GrantFiled: November 17, 2021Date of Patent: March 19, 2024Assignee: HITACHI ASTEMO, LTD.Inventors: Masatoshi Goto, Yuta Nakamura, Yoshinori Sagiya, Kazunari Kurokawa, Shugo Ueno, Shintaro Tai
-
Patent number: 10913997Abstract: Provided is an arc evaporation source capable of stably retaining an arc spot on the front end surface of a target and apparatus downsizing. An arc evaporation source includes a target to be melted and vaporized from its front end surface by arc discharge and at least one magnet disposed apart from a side surface of the target radially thereof. The magnet is disposed to form a magnetic field satisfying conditions a) and b) below, on the side surface, in a region of up to 10 mm from the front end surface axially of the target: a) an angle which magnetic lines of force forms with the side surface of the target is 45 degrees or less; and b) a component of the strength of the magnetic lines of force along the axial direction of the target is 200 G or more.Type: GrantFiled: July 3, 2015Date of Patent: February 9, 2021Assignee: Kobe Steel, Ltd.Inventors: Yoshinori Kurokawa, Satoshi Hirota, Shinichi Tanifuji
-
Publication number: 20170204507Abstract: Provided is an arc evaporation source capable of stably retaining an arc spot on the front end surface of a target and apparatus downsizing. An arc evaporation source includes a target to be melted and vaporized from its front end surface by arc discharge and at least one magnet disposed apart from a side surface of the target radially thereof. The magnet is disposed to form a magnetic field satisfying conditions a) and b) below, on the side surface, in a region of up to 10 mm from the front end surface axially of the target: a) an angle which magnetic lines of force forms with the side surface of the target is 45 degrees or less; and b) a component of the strength of the magnetic lines of force along the axial direction of the target is 200 G or more.Type: ApplicationFiled: July 3, 2015Publication date: July 20, 2017Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Yoshinori KUROKAWA, Satoshi HIROTA, Shinichi TANIFUJI
-
Publication number: 20160071699Abstract: Provided is a deposition device which can secure work space without vertical overlap of the deposition unit and the units upstream and downstream thereof. This deposition device is provided with a deposition unit (16), and upstream and downstream units (14, 18) arranged to the left and right thereof.Type: ApplicationFiled: May 8, 2014Publication date: March 10, 2016Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Toshiki SEGAWA, Naoki OHBA, Yoshinori KUROKAWA
-
Patent number: 9266180Abstract: An arc evaporation source having fast film-forming speed includes: at least one circumference magnet surrounding the circumference of a target, wherein the magnetization direction of the magnet runs orthogonal to the target surface; a non-ring shaped first permanent magnet on the target's rear surface side has a polarity in the same direction as the circumference magnet, and is arranged so that its magnetization direction runs orthogonal to the target's surface; a non-ring shaped second permanent magnet arranged either on the rear surface side of the first permanent magnet or between the first permanent magnet and the target, so as to leave a gap from the first permanent magnet, has a polarity in the same direction as the circumference magnet, and is arranged so that its magnetization direction runs orthogonal to the surface of the target; and a magnetic body between the first permanent magnet and the second permanent magnet.Type: GrantFiled: June 15, 2011Date of Patent: February 23, 2016Assignee: Kobe Steel, Ltd.Inventors: Shinichi Tanifuji, Kenji Yamamoto, Homare Nomura, Yoshinori Kurokawa, Naoyuki Goto
-
Patent number: 9200360Abstract: Provided is an arc evaporation source wherein film-forming speed is increased by inducing magnetic lines in the substrate direction. The arc evaporation source is provided with: at least one outer circumferential magnet (3), which is disposed such that the outer circumferential magnet surrounds the outer circumference of a target (2) and that the magnetization direction thereof is in the direction orthogonally intersecting the surface of the target (2); and a rear surface magnet (4) disposed on the rear surface side of the target (2). The rear surface magnet (4) has a non-ring-shaped first permanent magnet (4A) wherein the polarity thereof faces the same direction as the polarity of the outer circumferential magnet (3) and the magnetization direction of the rear surface magnet (4) is in the direction orthogonally intersecting the surface of the target (2).Type: GrantFiled: April 14, 2010Date of Patent: December 1, 2015Assignee: Kobe Steel, Ltd.Inventors: Shinichi Tanifuji, Kenji Yamamoto, Hirofumi Fujii, Yoshinori Kurokawa
-
Publication number: 20130098881Abstract: An arc evaporation source having fast film-forming speed includes: at least one circumference magnet surrounding the circumference of a target, wherein the magnetization direction of the magnet runs orthogonal to the target surface; a non-ring shaped first permanent magnet on the target's rear surface side has a polarity in the same direction as the circumference magnet, and is arranged so that its magnetization direction runs orthogonal to the target's surface; a non-ring shaped second permanent magnet arranged either on the rear surface side of the first permanent magnet or between the first permanent magnet and the target, so as to leave a gap from the first permanent magnet, has a polarity in the same direction as the circumference magnet, and is arranged so that its magnetization direction runs orthogonal to the surface of the target; and a magnetic body between the first permanent magnet and the second permanent magnet.Type: ApplicationFiled: June 15, 2011Publication date: April 25, 2013Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Shinichi Tanifuji, Kenji Yamamoto, Homare Nomura, Yoshinori Kurokawa, Naoyuki Goto
-
Publication number: 20120037493Abstract: Provided is an arc evaporation source wherein film-forming speed is increased by inducing magnetic lines in the substrate direction. The arc evaporation source is provided with: at least one outer circumferential magnet (3), which is disposed such that the outer circumferential magnet surrounds the outer circumference of a target (2) and that the magnetization direction thereof is in the direction orthogonally intersecting the surface of the target (2); and a rear surface magnet (4) disposed on the rear surface side of the target (2). The rear surface magnet (4) has a non-ring-shaped first permanent magnet (4A) wherein the polarity thereof faces the same direction as the polarity of the outer circumferential magnet (3) and the magnetization direction of the rear surface magnet (4) is in the direction orthogonally intersecting the surface of the target (2).Type: ApplicationFiled: April 14, 2010Publication date: February 16, 2012Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Shinichi Tanifuji, Kenji Yamamoto, Hirofumi Fujii, Yoshinori Kurokawa
-
Patent number: 6618464Abstract: A thickness-measuring device comprising (i) an X-ray tube unit including an X-ray tube, (ii) an X-ray detector unit including an X-ray detector having a sensor, and (iii) a means for driving the X-ray tube unit and the X-ray detector unit back and forth, in synchronism with each other, widthwise of an object whose thickness is measured and which runs through a pathline between the X-ray tube unit and the X-ray detector unit. A mask is set above the sensor of the X-ray detector to cover it partly; accordingly, the light-receiving area of the light receiver of the X-ray detector is smaller than the whole area of the sensor. Thus, the measuring area per unit time is reduced effectively.Type: GrantFiled: February 25, 2002Date of Patent: September 9, 2003Assignee: Futec Inc.Inventors: Kiyoshi Mizobuchi, Mitsuaki Kameyama, Yoshinori Kurokawa
-
Publication number: 20020141534Abstract: A thickness-measuring device comprising (i) an X-ray tube unit including an X-ray tube, (ii) an X-ray detector unit including an X-ray detector having a sensor, and (iii) a means for driving the X-ray tube unit and the X-ray detector unit back and forth, in synchronism with each other, widthwise of an object whose thickness is measured and which runs through a pathline between the X-ray tube unit and the X-ray detector unit. A mask is set above the sensor of the X-ray detector to cover it partly; accordingly, the light-receiving area of the light receiver of the X-ray detector is smaller than the whole area of the sensor. Thus, the measuring area per unit time is reduced effectively.Type: ApplicationFiled: February 25, 2002Publication date: October 3, 2002Inventors: Kiyoshi Mizobuchi, Mitsuaki Kameyama, Yoshinori Kurokawa
-
Patent number: 6203306Abstract: An apparatus for heating a rubber-metal plate composite formed of a plurality of unvulcanized rubber layers and metal plates, each being overlaid alternately, by induction heating, includes an induction coil for applying a magnetic field to the composite and heating the metal plates due to eddy currents generated by the magnetic field, a power unit for applying an alternating current to the induction coil to generate the magnetic field, and a mold to confine the periphery of the composite. The mold is made of a nonmagnetic or weakly magnetic material with electrical conductivity, such as austenitic stainless steel. The mold generates enough heat to function as the heating unit by generating eddy currents in the conductive mold while magnetic flux permeates the mold substantially without loss and reaches the composite therein.Type: GrantFiled: February 7, 2000Date of Patent: March 20, 2001Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Yoichi Inoue, Shigeru Yuki, Hirohiko Fukumoto, Shigeto Adachi, Kashiro Ureshino, Takayuki Sato, Yoshinori Kurokawa, Kazuhiko Sakiyama
-
Patent number: 6109903Abstract: A vulcanized rubber-metal plate composite is obtained by overlaying a plurality of unvulcanized rubber layers and metal plates alternately and heating thereof by magnetic induction heating. The vulcanized rubber-metal plate composite is obtained by placing a composite of a plurality of unvulcanized rubber layers and metal plates, each being overlaid alternately, into a place affected by an induction coil; heating the metal plates due to eddy currents formed in the metal plates by applying an alternating current to the induction coil; and vulcanizing the unvulcanized rubber layers due to heat conduction from the heated metal plates.Type: GrantFiled: September 30, 1997Date of Patent: August 29, 2000Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Yoichi Inoue, Shigeru Yuki, Hirohiko Fukumoto, Shigeto Adachi, Kashiro Ureshino, Takayuki Sato, Yoshinori Kurokawa, Kazuhiko Sakiyama
-
Patent number: 5984516Abstract: An enclosed kneading apparatus which can smoothly knead and disperse kneaded products of various kneading conditions without the maintenance of a rotor moving mechanism for a first and second rotors and the operation which sacrifices the handling capacity of the kneading apparatus and at the same time, prevent an excessive increase in the temperature of the kneaded products. In the apparatus, the kneaded product of a desired kneading state is obtained by flowing a kneading object in tip clearances between the inner wall of a chamber and a first and second rotors while rotating the first and second rotors in the chamber, and by imparting a shearing force to disperse the kneading object. The respective first and second rotors are provided with three long wings in helical fashion each having a plurality of tip portions for providing a plurality of three tip clearances in the axial direction.Type: GrantFiled: December 11, 1997Date of Patent: November 16, 1999Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Kimio Inoue, Kashiro Ureshino, Norifumi Yamada, Ko Takakura, Yoshinori Kurokawa
-
Patent number: 5791776Abstract: A hermetically closed kneading apparatus includes a casing member (1) having a chamber (2) and one pair of counter rotating, parallel rotors (3) (4). Each of rotor has three long blades (18) (19) (20) and of which the central axes (17a) (17b) of the rotors are set apart from each other so that the long blades may not mesh with each other. Each of the long blades extends spirally around the central axis (17a) (17b) of the rotors and are set apart from each other by an equivalent angle in a circumferential direction of the rotor. Each rotor has a profile corresponding to any one of the following features: (a) the profile is almost triangular. (b) the profile includes a straight line in each non-action (22) surface of the rear surface (26) of each blade with respect to a rotation direction, the straight line starts from edge (18a) of a tip (21) of each blade (18).Type: GrantFiled: December 20, 1996Date of Patent: August 11, 1998Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Ko Takakura, Kashiro Ureshino, Norifumi Yamada, Yoshinori Kurokawa
-
Patent number: 5782560Abstract: An internal mixer and controller enables the phase difference and the speed ratio between two rotors to be changed without stopping the operation of the mixer. The internal mixer comprises: nonintermeshed first and second rotors disposed in a mixing chamber; first and second drive units; first and second phase measuring devices; first and second speed measuring devices; and a control unit for controlling the first and second drive units on the basis of signals from the first and second speed measuring devices and signals from the first and second phase measuring devices. The control unit controls the two rotors so as to synchronously rotate at the same speed on the basis of the signals from the speed measuring devices when the two rotors fixedly rotate at the same speed.Type: GrantFiled: June 24, 1996Date of Patent: July 21, 1998Assignees: Kabushiki Kaisha Kobe Seiko Sho, Kobelco Stewart Bolling, Inc.Inventors: Takeshi Hatanaka, Norifumi Yamada, Ko Takakura, Tatsuya Tanaka, Yoshinori Kurokawa
-
Patent number: 5783983Abstract: An internal mixer having a floating weight disposed in contiguous with an internal mixer main body and made elevatable in a hopper to which a material to be mixed is charged, wherein a hydraulic cylinder for elevating the floating weight is disposed in contiguous with the internal mixer main body, a pneumatic/hydraulic pressure conversion means for pressure conversion between a hydraulic side and a pneumatic side is disposed separately from the internal mixer main body, and the hydraulic side of the hydraulic cylinder for lowering the floating weight is connected with the hydraulic side of the pneumatic/hydraulic pressure conversion means. The reliability of the internal mixer can be improved while making the structure compact and facilitating the maintenance operation.Type: GrantFiled: January 31, 1997Date of Patent: July 21, 1998Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Kashiro Ureshino, Norifumi Yamada, Ko Takakura, Yoshinori Kurokawa