Patents by Inventor Yasuharu Yamamoto
Yasuharu Yamamoto 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: 8997734Abstract: The concentrating heat receiver (10) is provided with a casing (41) which has an opening portion (15) into which sunrays are made incident, a heat receiving portion (42) which is accommodated inside the casing (41) so that a working fluid flows therethrough and receive heat from sunrays made incident from the opening portion, thereby raising the temperature of the working fluid, and hanging members (61, 62) in which the upper end sides thereof are coupled to an upper angle (14) and the other end sides thereof are loosely inserted into through holes (44a, 44b) of the casing (41), thereby supporting in a hanging manner the heat receiving portion (42) inside the casing (41).Type: GrantFiled: December 13, 2011Date of Patent: April 7, 2015Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kimihiko Mitsuda, Yasuharu Yamamoto, Toshiyuki Osada, Masashi Tagawa, Kazuta Kobayashi
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Publication number: 20140353068Abstract: In an electric power steering system, rotation of a motor is transmitted to a rack shaft via a drive pulley, a belt, a driven pulley and a ball nut. A ball bearing and the driven pulley are fitted to the outer periphery of the ball nut. A flange is formed at a first end portion of the ball nut, and an internal thread portion is formed at a second end portion of the ball nut. An external thread member is connected to the internal thread portion. The external thread member has an external thread portion and a flange. By fastening the external thread portion to the internal thread portion, the ball bearing and the driven pulley are held between the two flanges.Type: ApplicationFiled: May 30, 2014Publication date: December 4, 2014Applicant: JTEKT CORPORATIONInventor: Yasuharu YAMAMOTO
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Publication number: 20140234141Abstract: A magnetic-drive coupling pump configuration including an attachment/detachment mechanism allowing simple and reliable positioning and fixation is provided. Thrust-direction positioning and radial-direction positioning are achieved, respectively, by surface contact of a convex portion of a pump unit (10) inserted up to a predetermined position in a concave portion (31) of a drive motor unit (30), and contact between an outer circumferential surface of the convex portion (11) and an inner circumferential surface of the concave portion (31).Type: ApplicationFiled: February 8, 2012Publication date: August 21, 2014Inventors: Hideo Hoshi, Shogo Nakashima, Tatsuya Hidaka, Yasuharu Yamamoto, Takeshi Okubo
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Patent number: 8801405Abstract: A sealless-type centrifugal pump includes a casing that forms a pump chamber having a liquid inflow port and an outflow port, an impeller disposed in the pump chamber and rotatably supported by a pivot bearing, and a magnetic coupling device including a driven permanent magnet built into the impeller and a driving magnet that rotationally drives the driven permanent magnet through a partition. The impeller supported in the direction of the rotation axis with respect to the casing is driven by the magnetic coupling device, and pressure is applied to liquid introduced from the direction of the rotation axis through the inflow port to send the liquid through the outflow port in a radial direction. The magnetic coupling device is disposed on a line inclined from an impeller rotating surface to the inflow port side toward the center of the rotation axis.Type: GrantFiled: July 28, 2010Date of Patent: August 12, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Hideo Hoshi, Syogo Nakashima, Tatsuya Hidaka, Yasuharu Yamamoto, Takeshi Okubo
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Patent number: 8770952Abstract: A sealless-type centrifugal pump includes a casing that forms a pump chamber having a liquid inflow port and an outflow port, an impeller disposed in the pump chamber and rotatably supported by a pivot bearing, and a magnetic coupling device including a driven permanent magnet built into the impeller and a driving magnet that rotationally drives the driven permanent magnet through a partition. The impeller supported in the direction of the rotation axis with respect to the casing is driven by the magnetic coupling device, and pressure is applied to liquid introduced from the direction of the rotation axis through the inflow port to send the liquid through the outflow port in a radial direction. The magnetic coupling device is disposed on a line inclined from an impeller rotating surface to the inflow port side toward the center of the rotation axis.Type: GrantFiled: July 28, 2010Date of Patent: July 8, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Hideo Hoshi, Syogo Nakashima, Tatsuya Hidaka, Yasuharu Yamamoto, Takeshi Okubo
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Patent number: 8689927Abstract: An electric power steering device includes a metallic housing, a steered shaft, an electric motor, a ball screw device, a rolling bearing, elastic members, and a plain bearing. The plain bearing is provided between the housing and an outer ring of the rolling bearing, and formed from a resin material.Type: GrantFiled: January 23, 2012Date of Patent: April 8, 2014Assignee: JTEKT CorporationInventors: Yasuharu Yamamoto, Yuki Bando
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Patent number: 8505676Abstract: An electric power steering apparatus includes a gear housing that has a pulley space in which a driven pulley, a driving pulley and a timing belt that are placed so as to be operatable and which communicates with the outside of the gear housing. The gear housing also has a motor-side hole into which a drive shaft of an electric motor is inserted, and a pulley-side hole into which the drive pulley is inserted and which is formed at a position opposite the motor-side hole across the pulley space.Type: GrantFiled: July 18, 2011Date of Patent: August 13, 2013Assignee: JTEKT CorporationInventor: Yasuharu Yamamoto
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Patent number: 8324852Abstract: It is an object to detect the axial position of a rotor without using a sensor. A method for detecting the position of a motor including a rotor and a stator around which armature windings of a plurality of phases are wound is provided, wherein a position detecting coil is disposed on one axial end face of a stator core, an induced voltage generated in the position detecting coil is detected, and the axial position of the rotor is detected on the basis of the detection result.Type: GrantFiled: January 15, 2009Date of Patent: December 4, 2012Assignee: Mitsubishi Heavy Industries Ltd.Inventors: Yohei Kakiuchi, Takeshi Okubo, Yasuharu Yamamoto, Tatsuya Hidaka
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Publication number: 20120186896Abstract: An electric power steering device includes a metallic housing, a steered shaft, an electric motor, a ball screw device, a rolling bearing, elastic members, and a plain bearing. The plain bearing is provided between the housing and an outer ring of the rolling bearing, and formed from a resin material.Type: ApplicationFiled: January 23, 2012Publication date: July 26, 2012Applicant: JTEKT CORPORATIONInventors: Yasuharu Yamamoto, Yuki Bando
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Publication number: 20120160232Abstract: The concentrating heat receiver (10) is provided with a casing (41) which has an opening portion (15) into which sunrays are made incident, a heat receiving portion (42) which is accommodated inside the casing (41) so that a working fluid flows therethrough and receive heat from sunrays made incident from the opening portion, thereby raising the temperature of the working fluid, and hanging members (61, 62) in which the upper end sides thereof are coupled to an upper angle (14) and the other end sides thereof are loosely inserted into through holes (44a, 44b) of the casing (41), thereby supporting in a hanging manner the heat receiving portion (42) inside the casing (41).Type: ApplicationFiled: December 13, 2011Publication date: June 28, 2012Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kimihiko MITSUDA, Yasuharu YAMAMOTO, Toshiyuki OSADA, Masashi TAGAWA, Kazuta KOBAYASHI
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Patent number: 8114008Abstract: Provided are a magnetic coupling as an axial bearing including a driven magnet (11B3) that is a permanent magnet provided to a rotating body (11) inside a casing (12) and a drive magnet (23A) that is a permanent magnet placed face to face with the driven magnet in a radial direction of the rotating body outside the casing to be magnetically coupled with the driven magnet, a driving motor (22) that rotatably drives the drive magnet about an axis (P) of the rotating body, a radial bearing that is a dynamic bearing having annular bearing surfaces (12B1, 11B1) centering on the axis on an inner wall of the casing and the rotating body, each of the annular bearing surfaces being arranged with a gap between the drive magnet and the driven magnet in the radial direction of the rotating body, and a closed impeller (11A) including a front shroud (11A1) arranged on a front side in the axis direction in the rotating body, a rear shroud (11A2) arranged on a rear side in the axis direction of the front shroud, and a vane (Type: GrantFiled: January 22, 2009Date of Patent: February 14, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Tatsuya Hidaka, Takeshi Okubo, Yasuharu Yamamoto, Toshiyuki Osada, Masashi Tagawa
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Publication number: 20120018242Abstract: An electric power steering apparatus includes a gear housing that has a pulley space in which a driven pulley, a driving pulley and a timing belt that are placed so as to be operatable and which communicates with the outside of the gear housing. The gear housing also has a motor-side hole into which a drive shaft of an electric motor is inserted, and a pulley-side hole into which the drive pulley is inserted and which is formed at a position opposite the motor-side hole across the pulley space.Type: ApplicationFiled: July 18, 2011Publication date: January 26, 2012Applicant: JTEKT CORPORATIONInventor: Yasuharu YAMAMOTO
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Publication number: 20110188996Abstract: A sealless-type centrifugal pump provides a centrifugal pump that is free from leakage without using a shaft seal mechanism. The centrifugal pump includes a casing that forms a pump chamber having a liquid inflow port and an outflow port, an impeller disposed in the pump chamber and rotatably supported by a pivot bearing, and a magnetic coupling device including a driven permanent magnet built into the impeller and a driving magnet that rotationally drives the driven permanent magnet through a partition. The impeller supported in the direction of the rotation axis with respect to the casing is driven by the magnetic coupling device, and pressure is applied to liquid introduced from the direction of the rotation axis through the inflow port to send the liquid through the outflow port in a radial direction. The magnetic coupling device is disposed on a line inclined from an impeller rotating surface to the inflow port side toward the center of the rotation axis.Type: ApplicationFiled: July 28, 2010Publication date: August 4, 2011Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hideo HOSHI, Syogo NAKASHIMA, Tatsuya HIDAKA, Yasuharu YAMAMOTO, Takeshi OKUBO
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Publication number: 20110175561Abstract: It is an object to detect the axial position of a rotor without using a sensor. A method for detecting the position of a motor including a rotor and a stator around which armature windings of a plurality of phases are wound is provided, wherein a position detecting coil is disposed on one axial end face of a stator core, an induced voltage generated in the position detecting coil is detected, and the axial position of the rotor is detected on the basis of the detection result.Type: ApplicationFiled: January 15, 2009Publication date: July 21, 2011Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Yohei Kakiuchi, Takeshi Okubo, Yasuharu Yamamoto, Tatsuya Hidaka
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Publication number: 20100284796Abstract: In a pump, a main shaft (16) is rotatably supported by ball bearings (14, 15) in a casing (13) having a suction opening (11) and a discharge opening (12), an impeller (1) is connected to an end of the main shaft (16), and a canned motor (18) rotatably drives the impeller (17) through the main shaft (16). A front shroud (44) is provided at the front side in the axial center direction of the impeller (17), and a rear shroud (45) is provided at the rear side in the axial center direction. A predetermined gap (47) facing the axial direction is formed between the casing (13) and the front shroud (44), and sealing units (48, 49) facing the radial direction are provided between the casing (13) and the front shroud (44). This allows for extended life of the pump.Type: ApplicationFiled: January 16, 2009Publication date: November 11, 2010Applicant: MITSUBISIHI HEAVY INDUSTRIES, LTDInventors: Kimihiko Mitsuda, Yasuharu Yamamoto
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Publication number: 20100280305Abstract: Provided are a magnetic coupling as an axial bearing including a driven magnet (11B3) that is a permanent magnet provided to a rotating body (11) inside a casing (12) and a drive magnet (23A) that is a permanent magnet placed face to face with the driven magnet in a radial direction of the rotating body outside the casing to be magnetically coupled with the driven magnet, a driving motor (22) that rotatably drives the drive magnet about an axis (P) of the rotating body, a radial bearing that is a dynamic bearing having annular bearing surfaces (12B1, 11B1) centering on the axis on an inner wall of the casing and the rotating body, each of the annular bearing surfaces being arranged with a gap between the drive magnet and the driven magnet in the radial direction of the rotating body, and a closed impeller (11A) including a front shroud (11A1) arranged on a front side in the axis direction in the rotating body, a rear shroud (11A2) arranged on a rear side in the axis direction of the front shroud, and a vane (Type: ApplicationFiled: January 22, 2009Publication date: November 4, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTDInventors: Tatsuya Hidaka, Takeshi Okubo, Yasuharu Yamamoto, Toshiyuki Osada, Masashi Tagawa
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Patent number: 7785082Abstract: A rotating shaft is supported by journal bearings that can support without contacting the rotating shaft itself. Then, one end of both shaft end portions of the rotating shaft has a main impeller installed and the other end is provided with a sub impeller. By utilizing a force being generated by rotation of the main impeller, liquid being pumped (fluid being pumped) is sucked in through a suction port and discharged through a discharge port. On the other hand, by utilizing a force being generated by rotation of the sub impeller, fluid is transported to the journal bearings, thereby having the journal bearings support the rotating shaft.Type: GrantFiled: September 9, 2005Date of Patent: August 31, 2010Assignee: Mitsubishi Heavy Industries, LtdInventors: Kimihiko Mitsuda, Yasuharu Yamamoto, Toshiyuki Osada, Zenichi Yoshida
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Patent number: 7502648Abstract: An artificial cardiac pump includes an impeller (3) rotatably supported on a fixed shaft body (2) in a housing (1) and a drive mechanism rotating the impeller, wherein blood is taken in from the front side and force-fed to the rear side by the rotation of the impeller (3). The shaft body (2) is connected between a front side fixed body (5) fixed to a straightening plate (4) joined to the housing (1) at the front of the impeller (3) and a rear side fixed body (7) fixed to a diffuser (6) joined to the housing (1) at the rear of the impeller (3). The impeller (3) further includes a sleeve (8) having an inner peripheral surface opposed to the outer peripheral surface of the shaft body (2) through a minute clearance and front and rear end faces opposed to the rear end face of the front side fixed body (5) and the front end face of the rear side fixed body (7) through minute clearances, and an impeller (9) joined to the outer peripheral surface of the sleeve (8).Type: GrantFiled: April 23, 2004Date of Patent: March 10, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Takeshi Okubo, Toshiyuki Osada, Yasuharu Yamamoto, Takeshi Sano, Yusuke Miyamoto, Kazuyoshi Miyagawa
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Patent number: 7416344Abstract: A pump for carrying supercritical CO2 fluid or liquid CO2 capable of securing reliability by optimizing a bearing part. An angular ball bearing (8) comprises an inner ring (8a), an outer ring (8b), balls (8c) held therebetween, and a cage (8d) holding the balls (8c). Both the balls and the inner and outer rings are formed of a ceramic to form a totally ceramic bearing. Also, the cage (8d) is guided by the outer ring or the inner ring. Specifically, for example, when the cage is guided by the inner ring, the inner peripheral surface (8db) of the cage (8d) opposed to the outermost peripheral surface (8ab) of the inner ring (8a) is guided by the outermost peripheral surface (8ab) of the inner ring (8a).Type: GrantFiled: July 21, 2004Date of Patent: August 26, 2008Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Yasuharu Yamamoto, Toshiyuki Osada, Takafumi Yoshida, Takaaki Kaikogi, Masaharu Minami
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Patent number: 7337689Abstract: A ball screw mechanism including a screw shaft with a screw groove formed on an external surface, a nut with a screw groove formed on an internal surface, and plural balls held in the grooves. A ball circulation piece is fit in a window portion in the nut and has a circulation groove for circulating the balls. The screw groove of the nut and the circulation groove are machined by moving a tool of a diameter equal to or larger than the diameter of the balls, along the screw groove of the nut so that a step is eliminated at a joint therebetween. The infeed depth of the tool is gradually changed as the tool is moved toward the joint so that boundary lines between a machined surface and a non-machined surface on flanks of the screw groove of the nut extend at an acute angle to one another.Type: GrantFiled: October 1, 2004Date of Patent: March 4, 2008Assignee: JTEKT CorporationInventors: Yasuharu Yamamoto, Sentarou Sugita