Patents by Inventor Wataru Yamauchi
Wataru Yamauchi 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: 20170276226Abstract: A slide component comprises a base member and a plated layer. The base member is made of a titanium alloy including beta phase of titanium. The base member includes a surface having a plurality of recesses. The plated layer is provided on the surface of the base member.Type: ApplicationFiled: March 28, 2016Publication date: September 28, 2017Applicant: SHIMANO INC.Inventors: Dai YOKOZAWA, Wataru YAMAUCHI, Michiaki KOMADA, Takeshi OI
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Patent number: 9698637Abstract: A rotating portion of a motor includes a magnet, a yoke, and a hub. An upper portion of the yoke is fixed to the hub. The yoke includes a first inner circumferential surface radially opposite to an outer circumferential surface of the magnet with a first gap intervening therebetween, and a second inner circumferential surface radially opposite to the outer circumferential surface of the magnet with a second gap intervening therebetween below the first inner circumferential surface. The second inner circumferential surface is parallel or substantially parallel to the outer circumferential surface of the magnet, and is located radially outward of the first inner circumferential surface. An adhesive is provided in at least a portion of the first gap. No adhesive is provided in at least a lower axial end portion of the second gap.Type: GrantFiled: April 22, 2015Date of Patent: July 4, 2017Assignee: NIDEC CORPORATIONInventors: Shunichi Ochitani, Wataru Yamauchi, Masayuki Maeda
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Publication number: 20160333949Abstract: A bicycle disc brake rotor is basically provided with a main body and a heat release layer. The main body is made of a metallic material. The main body includes an outer portion, an inner portion and a cooling facilitation part. The outer portion has oppositely facing braking surfaces. The heat release layer includes a non-metallic material. The heat release layer at least partially overlies the cooling facilitation part.Type: ApplicationFiled: May 14, 2015Publication date: November 17, 2016Inventors: Akio NAGAI, Wataru YAMAUCHI, Toru IWAI
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Patent number: 9459049Abstract: In a method for cooling liquid, when a liquid containing a volatile component and a surfactant is supplied to an atmosphere having a pressure which is lower than or equal to the saturated vapor pressure of the volatile component so that at least a portion of the volatile component is vaporized, whereby the liquid is cooled, a gas other than the volatile component is introduced into the atmosphere having the pressure so that the gas contacts the liquid.Type: GrantFiled: December 19, 2014Date of Patent: October 4, 2016Assignee: KAO CORPORATIONInventors: Toku Fujioka, Wataru Yamauchi
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Publication number: 20160261157Abstract: A rotating portion of a motor includes a magnet, a yoke, and a hub. An upper portion of the yoke is fixed to the hub. The yoke includes a first inner circumferential surface radially opposite to an outer circumferential surface of the magnet with a first gap intervening therebetween, and a second inner circumferential surface radially opposite to the outer circumferential surface of the magnet with a second gap intervening therebetween below the first inner circumferential surface. The second inner circumferential surface is parallel or substantially parallel to the outer circumferential surface of the magnet, and is located radially outward of the first inner circumferential surface. An adhesive is provided in at least a portion of the first gap. No adhesive is provided in at least a lower axial end portion of the second gap.Type: ApplicationFiled: April 22, 2015Publication date: September 8, 2016Applicant: NIDEC CORPORATIONInventors: Shunichi OCHITANI, Wataru YAMAUCHI, Masayuki MAEDA
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Patent number: 9065315Abstract: A rotating portion of a motor includes a magnet, a yoke including a yoke cylindrical portion, and a hub including a hub cylindrical portion. A first radial gap, which is a radial gap between the magnet and the yoke cylindrical portion, is filled with an adhesive from an upper axial end to an axial middle portion thereof, and includes a tapered gap gradually increasing in radial width with decreasing height. An upper axial end of the tapered gap is located above the axial middle portion of the first radial gap. In addition, no adhesive is provided from a lower axial end to an axial middle portion of a second radial gap, which is a radial gap between the yoke cylindrical portion and the hub cylindrical portion.Type: GrantFiled: December 15, 2014Date of Patent: June 23, 2015Assignee: Nidec CorporationInventors: Shunichi Ochitani, Wataru Yamauchi, Masayuki Maeda
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Publication number: 20150112094Abstract: In a method for cooling liquid, when a liquid containing a volatile component and a surfactant is supplied to an atmosphere having a pressure which is lower than or equal to the saturated vapor pressure of the volatile component so that at least a portion of the volatile component is vaporized, whereby the liquid is cooled, a gas other than the volatile component is introduced into the atmosphere having the pressure so that the gas contacts the liquid.Type: ApplicationFiled: December 19, 2014Publication date: April 23, 2015Applicant: KAO CORPORATIONInventors: Toku FUJIOKA, Wataru YAMAUCHI
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Patent number: 8961657Abstract: In a method for cooling liquid, when a liquid containing a volatile component and a surfactant is supplied to an atmosphere having a pressure which is lower than or equal to the saturated vapor pressure of the volatile component so that at least a portion of the volatile component is vaporized, whereby the liquid is cooled, a gas other than the volatile component is introduced into the atmosphere having the pressure so that the gas contacts the liquid.Type: GrantFiled: December 8, 2010Date of Patent: February 24, 2015Assignee: Kao CorporationInventors: Toku Fujioka, Wataru Yamauchi
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Publication number: 20140196569Abstract: A composite bicycle component includes a first member made of a metallic material. The first member has a surface with a first dimple. The first dimple includes a second dimple that is formed on the first dimple. Preferably, the composite bicycle component further includes a second member attached to the first member so that a part of the second member extends into the first and second dimples.Type: ApplicationFiled: January 11, 2013Publication date: July 17, 2014Applicant: SHIMANO INC.Inventors: Tetsu NONOSHITA, Toyoshi YOSHIDA, Wataru YAMAUCHI
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Patent number: 8315012Abstract: A spindle motor for use in a disk drive apparatus includes stationary and rotating portions. The stationary portion includes a shaft including a thrust plate. A sleeve portion includes an axial end surface arranged opposite the thrust plate. A first seal member is arranged opposite the thrust plate on an opposite side with respect to the sleeve portion. The thrust plate preferably includes a plate communicating hole arranged to connect first and second thrust gaps defined, respectively, between the thrust plate and the sleeve portion and between the thrust plate and the first seal member. The sleeve portion preferably includes a sleeve communicating hole arranged to connect the first thrust gap with an opposite axial side thereof. A lubricant is arranged to fill a communicating channel extending from a first to a second capillary seal portion through the plate communicating hole and the sleeve communicating hole.Type: GrantFiled: March 28, 2011Date of Patent: November 20, 2012Assignee: Nidec CorporationInventors: Toshikazu Himeno, Shozo Tagata, Shinya Yano, Wataru Yamauchi, Akihiro Yudate
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Publication number: 20120259136Abstract: In a method for cooling liquid, when a liquid containing a volatile component and a surfactant is supplied to an atmosphere having a pressure which is lower than or equal to the saturated vapor pressure of the volatile component so that at least a portion of the volatile component is vaporized, whereby the liquid is cooled, a gas other than the volatile component is introduced into the atmosphere having the pressure so that the gas contacts the liquid.Type: ApplicationFiled: December 8, 2010Publication date: October 11, 2012Inventors: Toku Fujioka, Wataru Yamauchi
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Publication number: 20110235210Abstract: A spindle motor for use in a disk drive apparatus includes stationary and rotating portions. The stationary portion includes a shaft including a thrust plate. A sleeve portion includes an axial end surface arranged opposite the thrust plate. A first seal member is arranged opposite the thrust plate on an opposite side with respect to the sleeve portion. The thrust plate preferably includes a plate communicating hole arranged to connect first and second thrust gaps defined, respectively, between the thrust plate and the sleeve portion and between the thrust plate and the first seal member. The sleeve portion preferably includes a sleeve communicating hole arranged to connect the first thrust gap with an opposite axial side thereof. A lubricant is arranged to fill a communicating channel extending from a first to a second capillary seal portion through the plate communicating hole and the sleeve communicating hole.Type: ApplicationFiled: March 28, 2011Publication date: September 29, 2011Applicant: NIDEC CORPORATIONInventors: Toshikazu HIMENO, Shozo TAGATA, Shinya YANO, Wataru YAMAUCHI, Akihiro YUDATE
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Patent number: 7633204Abstract: A motor stator includes a stator core stack having a core back and a plurality of teeth extending from the core back in a radial direction of the core back. The motor stator also includes winding wires wound around the teeth and having no bonding layer. Only winding wires of the first and third phases are wound to prevent loosening thereof.Type: GrantFiled: August 28, 2007Date of Patent: December 15, 2009Assignee: Nidec CorporationInventors: Hiromasa Fujii, Wataru Yamauchi
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Publication number: 20080055764Abstract: A motor stator includes a stator core stack having a core back and a plurality of teeth extending from the core back in a radial direction of the core back. The motor stator also includes winding wires wound around the teeth and having no bonding layer. Only winding wires of the first and third phases are wound to prevent loosening thereof.Type: ApplicationFiled: August 28, 2007Publication date: March 6, 2008Applicant: NIDEC CORPORATIONInventors: Hiromasa FUJII, Wataru YAMAUCHI
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Patent number: 7244514Abstract: A corrosion resistant part comprises an aluminum alloy part main body, an alumite layer disposed on the part main body, and a corrosion resistant layer disposed on the alumite layer. The part main body has a normal portion and a flawed portion so that the alumite layer comprises a normal portion alumite layer formed on the normal portion and a flawed portion alumite layer formed on the flawed portion, and the corrosion resistant layer comprises a normal portion corrosion resistant layer formed on the normal portion and a flawed portion corrosion resistant layer formed on the flawed portion. The normal portion alumite layer has a thickness between approximately 0.5 microns and approximately 5.0 microns. The corrosion resistant layer is formed from an ionic resin and has a thickness less than or equal to approximately 5 microns.Type: GrantFiled: November 29, 2004Date of Patent: July 17, 2007Assignee: Shimano, Inc.Inventors: Masaaki Hara, Wataru Yamauchi, Kenji Matsuda, Masayoshi Kihara
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Publication number: 20060191881Abstract: A coupling method, a spindle motor using the coupling method and a recording disk driving apparatus using the spindle motor are disclosed. An upper depression (43) and a lower depression (44) of a hub (4) are welded to an upper seal (61) and a lower seal (62), respectively. The weld zone is coated with an oil repellant (700) or welded again by laser with a smaller energy. A pore, even if generated at the weld zone, is closed by the oil repellant (700) or the opening of the pore is melted and filled thereby to prevent the leakage of a lubricating fluid (600) out of a motor.Type: ApplicationFiled: December 13, 2005Publication date: August 31, 2006Applicant: Nidec CorporationInventors: Wataru Yamauchi, Masaaki Karuo, Naoki Tasai
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Publication number: 20050260424Abstract: A corrosion resistant part comprises an aluminum alloy part main body, an alumite layer disposed on the part main body, and a corrosion resistant layer disposed on the alumite layer. The part main body has a normal portion and a flawed portion so that the alumite layer comprises a normal portion alumite layer formed on the normal portion and a flawed portion alumite layer formed on the flawed portion, and the corrosion resistant layer comprises a normal portion corrosion resistant layer formed on the normal portion and a flawed portion corrosion resistant layer formed on the flawed portion. The normal portion alumite layer has a thickness between approximately 0.5 microns and approximately 5.0 microns. The corrosion resistant layer is formed from an ionic resin and has a thickness less than or equal to approximately 5 microns.Type: ApplicationFiled: November 29, 2004Publication date: November 24, 2005Applicant: SHIMANO, INC.Inventors: Masaaki Hara, Wataru Yamauchi, Kenji Matsuda, Masayoshi Kihara
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Patent number: 6854889Abstract: Spindle-motor hydrodynamic bearing configuration having conical taper seals on the thrust-bearing ends. The spindle motor shaft is supported in a bore through the rotor by neighboring radial and thrust hydrodynamic bearings constituted through radial micro-gaps cylindrically between the shaft and rotor, axial micro-gaps between thrust plates on either shaft end and recesses endwise in the rotor bore, dynamic-pressure-generating grooves in the micro-gap forming surfaces, and lubricant retained continuously in the radial and axial micro-gaps. The thrust plates are at least partially conical, tapering axially outward. A ring fitted in each rotor bore recess has a conical inner peripheral surface corresponding to the opposing conical surface of the thrust plate, forming a taper seal sloped with respect to the rotational axial center of the motor. The gap clearance dimension gradually expands heading axially outward, wherein the lubricant forms an axial-end gas-liquid interface to function as a taper seal.Type: GrantFiled: March 4, 2003Date of Patent: February 15, 2005Assignee: Nidec CorporationInventors: Hideki Nishimura, Kunihiro Shida, Wataru Yamauchi
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Publication number: 20040175062Abstract: Spindle-motor hydrodynamic bearing configuration having conical taper seals on the thrust-bearing ends. The spindle motor shaft is supported in a bore through the rotor by neighboring radial and thrust hydrodynamic bearings constituted through radial micro-gaps cylindrically between the shaft and rotor, axial micro-gaps between thrust plates on either shaft end and recesses endwise in the rotor bore, dynamic-pressure-generating grooves in the micro-gap forming surfaces, and lubricant retained continuously in the radial and axial micro-gaps. The thrust plates are at least partially conical, tapering axially outward. A ring fitted in each rotor bore recess has a conical inner peripheral surface corresponding to the opposing conical surface of the thrust plate, forming a taper seal sloped with respect to the rotational axial center of the motor. The gap clearance dimension gradually expands heading axially outward, wherein the lubricant forms an axial-end gas-liquid interface to function as a taper seal.Type: ApplicationFiled: March 4, 2003Publication date: September 9, 2004Applicant: NIDEC CORPORATIONInventors: Hideki Nishimura, Kunihiro Shida, Wataru Yamauchi