Patents by Inventor Yuichi Arai
Yuichi Arai 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: 11915851Abstract: An inductor includes an external terminal and an element body that includes a magnetic portion containing a magnetic powder and a coil embedded in the magnetic portion. The magnetic powder has a particle size D50 at 50% of the cumulative volume of 5 ?m or less, a D90/D10 of 19 or lower, and a Vickers hardness of 1000 (kgf/mm2) or lower, the D90/D10 being the ratio of particle size D90 at 90% of the cumulative volume to particle size D10 at 10% of the cumulative volume in the cumulative particle size distribution by volume. In the magnetic portion, the packing density of the magnetic powder by volume is 60% or higher.Type: GrantFiled: October 16, 2020Date of Patent: February 27, 2024Assignee: Murata Manufacturing Co., Ltd.Inventors: Yuichi Tsuchiya, Takumi Arai, Motoki Toyama, Ryuta Uematsu
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Patent number: 11842754Abstract: A hard disk drive (HDD) includes an enclosure base, a first cover coupled to the base, and two separate gasket seals composed of different materials and configured to seal the interface between the first cover and the base. One gasket seal is composed of a material having a low permeability to helium or another lighter-than-air gas contained within the HDD, and the other gasket seal is composed of material having a low water vapor or moisture transmission. By using two separate independent gaskets which have different attributes, the lighter-than-air gas concentration is kept high and humidity is kept low during manufacturing testing, prior to affixing a hermetic second cover over the first cover, and degradation of HDD performance due to change of flying height is ultimately avoided.Type: GrantFiled: May 10, 2022Date of Patent: December 12, 2023Assignee: Western Digital Technologies, Inc.Inventors: Yuichi Arai, Miki Namihisa, Hiroshi Matsuda, Takashi Tomita
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Patent number: 11615810Abstract: A hard disk drive enclosure base includes a non-uniform disk shroud surface extending from a top to a floor, the shroud surface including a first portion having a first radius and clearance along the circumference of the shroud surface and a second portion having a lesser second radius and clearance. The second portion of the shroud surface may be positioned at multiple locations where the drive form factor is especially constraining and in view of the need for a sufficient seal land surface for applying a gasket seal around the perimeter of the inner cavity of the base part. Widening the disk shroud clearance where possible can reduce the shear stress exerted at the disk edges thereby reducing the windage drag and associated disk spindle motor power consumption, especially in the context of helium-filled drives in which disk flutter is less of an issue.Type: GrantFiled: April 1, 2022Date of Patent: March 28, 2023Assignee: Western Digital Technologies, Inc.Inventors: Andre Chan, Yoshiyuki Hirono, Yuichi Arai
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Publication number: 20220270651Abstract: A hard disk drive (HDD) includes an enclosure base, a first cover coupled to the base, and two separate gasket seals composed of different materials and configured to seal the interface between the first cover and the base. One gasket seal is composed of a material having a low permeability to helium or another lighter-than-air gas contained within the HDD, and the other gasket seal is composed of material having a low water vapor or moisture transmission. By using two separate independent gaskets which have different attributes, the lighter-than-air gas concentration is kept high and humidity is kept low during manufacturing testing, prior to affixing a hermetic second cover over the first cover, and degradation of HDD performance due to change of flying height is ultimately avoided.Type: ApplicationFiled: May 10, 2022Publication date: August 25, 2022Inventors: Yuichi Arai, Miki Namihisa, Hiroshi Matsuda, Takashi Tomita
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Patent number: 11373677Abstract: The present disclosure generally relates to a voice coil motor (VCM) yoke for a data storage device. The VCM yoke has a unitary body turned back on itself at opposite ends to form a āCā shape. The unitary body is electrically conductive. The body has a substantially flat inner surface upon which the coil is disposed. The unitary body also has a substantially flat top and a substantially flat bottom surface. A coil is disposed within the turns of the unitary body. The VCM yoke can be coupled to an actuator block using one or more fastening mechanisms that extend through openings in the VCM yoke.Type: GrantFiled: August 14, 2020Date of Patent: June 28, 2022Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Miki Namihisa, Kouki Uefune, Toshio Takahashi, Yuichi Arai
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Patent number: 11348619Abstract: A hard disk drive (HDD) includes an enclosure base, a first cover coupled to the base, and two separate gasket seals composed of different materials and configured to seal the interface between the first cover and the base. One gasket seal is composed of a material having a low permeability to helium or another lighter-than-air gas contained within the HDD, and the other gasket seal is composed of material having a low water vapor or moisture transmission. By using two separate independent gaskets which have different attributes, helium concentration is kept high and humidity is kept low during manufacturing testing, prior to affixing a hermetic second cover over the first cover, and degradation of HDD performance due to change of flying height is ultimately avoided.Type: GrantFiled: February 16, 2021Date of Patent: May 31, 2022Assignee: Western Digital Technologies, Inc.Inventors: Yuichi Arai, Miki Namihisa, Hiroshi Matsuda, Takashi Tomita
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Publication number: 20220020399Abstract: A hard disk drive (HDD) includes an enclosure base, a first cover coupled to the base, and two separate gasket seals composed of different materials and configured to seal the interface between the first cover and the base. One gasket seal is composed of a material having a low permeability to helium or another lighter-than-air gas contained within the HDD, and the other gasket seal is composed of material having a low water vapor or moisture transmission. By using two separate independent gaskets which have different attributes, helium concentration is kept high and humidity is kept low during manufacturing testing, prior to affixing a hermetic second cover over the first cover, and degradation of HDD performance due to change of flying height is ultimately avoided.Type: ApplicationFiled: February 16, 2021Publication date: January 20, 2022Inventors: Yuichi Arai, Miki Namihisa, Hiroshi Matsuda, Takashi Tomita
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Publication number: 20210407545Abstract: The present disclosure generally relates to a voice coil motor (VCM) yoke for a data storage device. The VCM yoke has a unitary body turned back on itself at opposite ends to form a āCā shape. The unitary body is electrically conductive. The body has a substantially flat inner surface upon which the coil is disposed. The unitary body also has a substantially flat top and a substantially flat bottom surface. A coil is disposed within the turns of the unitary body. The VCM yoke can be coupled to an actuator block using one or more fastening mechanisms that extend through openings in the VCM yoke.Type: ApplicationFiled: August 14, 2020Publication date: December 30, 2021Inventors: Miki NAMIHISA, Kouki UEFUNE, Toshio TAKAHASHI, Yuichi ARAI
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Patent number: 10997998Abstract: The present disclosure generally relates to a tape embedded drive having the spindles upon which the tape reels are disposed, fixedly coupled at both the bottom and the top to ensure stability of the reels. Furthermore, an additional cover over the spindle can be used to secure the top coupling mechanism and the spindle to the tape embedded drive enclosure to provide additional stability. A sealing cover is then placed over the additional cover to tightly seal the enclosure.Type: GrantFiled: June 24, 2020Date of Patent: May 4, 2021Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Kouki Uefune, Toshio Takahashi, Takako Hayakawa, Yuichi Arai
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Patent number: 10622027Abstract: Disclosed herein is a magnetic storage device that comprises a housing having a base and a cover. The base includes a bottom portion and side portions that define an interior cavity for maintaining magnetic disks. The side portions form a top surface configured to receive the cover. The magnetic storage device also includes a continuous gasket disposed between the cover and the top surface. The continuous gasket is formed with at least a first region having a first cross-sectional profile, and a second region having a second cross-sectional profile. The magnetic storage device also includes an adhesive disposed between the continuous gasket and the top surface and configured to bond the continuous gasket to the base.Type: GrantFiled: November 28, 2018Date of Patent: April 14, 2020Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Jiro Kaneko, Yoshiya Usami, Yuichi Arai
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Patent number: 10424345Abstract: A misalignment-tolerant flexible type electrical feed-through assembly, which is able to tolerate connector misalignment, involves a flexible circuit assembly (FCA) part constructed as a laminate structure of a base insulating layer, a conductor layer, and a cover insulating layer, where the FCA part is wrapped around a plurality of metal parts, where the metal parts are slidable relative to each other. Such a feed-through assembly may be used at an interface between a hermetically-sealed internal environment, such as in a lighter-than-air gas filled data storage device, and the external environment.Type: GrantFiled: December 22, 2018Date of Patent: September 24, 2019Assignee: Western Digital Technologies, Inc.Inventors: Miki Namihisa, Kimihiko Sudo, Takako Hayakawa, Yuichi Arai
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Patent number: 9721619Abstract: A hermetically-sealed hard disk drive (HDD) utilizes a laminated film seal to seal an interface of an electrical feed-through connector and an HDD enclosure base. The laminated film seal may be constructed of a heat sealant layer that bonds with a surface of the base and a surface of the electrical connector, a barrier layer which inhibits gas from escaping from inside the HDD, and a film surface protective layer which protects the heat sealant and barrier layers. Embodiments may include a heat sealant layer comprising a thermoplastic polymer such as polypropylene, a barrier layer comprising a metal such as aluminum, and a film surface protective layer comprising a thermoplastic polymer such as polyethylene terephthalate.Type: GrantFiled: December 9, 2015Date of Patent: August 1, 2017Assignee: Western Digital Technologies, Inc.Inventors: Kimihiko Sudo, Takako Hayakawa, Yuichi Arai, Yuta Onobu
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Patent number: 9721620Abstract: A hermetically-sealed hard disk drive (HDD) utilizes a laminated film seal to seal an HDD cover-to-base interface. The laminated film seal may be constructed of a heat sealant layer hermetically-coupled to and forming a seal with the base, a barrier layer which inhibits gas from escaping from inside the HDD, and a film surface protective layer which protects the heat sealant and barrier layers. Embodiments may include a heat sealant layer comprising a thermoplastic polymer such as polypropylene, a barrier layer comprising a metal such as aluminum, and a film surface protective layer comprising a thermoplastic polymer such as polyethylene terephthalate.Type: GrantFiled: December 9, 2015Date of Patent: August 1, 2017Assignee: Western Digital Technologies, Inc.Inventors: Kimihiko Sudo, Takako Hayakawa, Yuichi Arai, Yuta Onobu
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Patent number: 9704539Abstract: A hermetically-sealed hard disk drive (HDD) utilizes a laminated film seal to seal an interface of an electrical flexible cable assembly and an HDD enclosure base. The laminated film seal may be constructed of a heat sealant layer that bonds with a surface of the base and a surface of the flex cable, a barrier layer which inhibits gas from escaping from inside the HDD, and a film surface protective layer which protects the heat sealant and barrier layers. Embodiments may include a heat sealant layer comprising a thermoplastic polymer such as polypropylene, a barrier layer comprising a metal such as aluminum, and a film surface protective layer comprising a thermoplastic polymer such as polyethylene terephthalate.Type: GrantFiled: December 9, 2015Date of Patent: July 11, 2017Assignee: Western Digital Technologies, Inc.Inventors: Kimihiko Sudo, Takako Hayakawa, Yuichi Arai, Yuta Onobu
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Publication number: 20170169860Abstract: A hermetically-sealed hard disk drive (HDD) utilizes a laminated film seal to seal an interface of an electrical feed-through connector and an HDD enclosure base. The laminated film seal may be constructed of a heat sealant layer that bonds with a surface of the base and a surface of the electrical connector, a barrier layer which inhibits gas from escaping from inside the HDD, and a film surface protective layer which protects the heat sealant and barrier layers. Embodiments may include a heat sealant layer comprising a thermoplastic polymer such as polypropylene, a barrier layer comprising a metal such as aluminum, and a film surface protective layer comprising a thermoplastic polymer such as polyethylene terephthalate.Type: ApplicationFiled: December 9, 2015Publication date: June 15, 2017Inventors: Kimihiko Sudo, Takako Hayakawa, Yuichi Arai, Yuta Onobu
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Publication number: 20170169862Abstract: A hermetically-sealed hard disk drive (HDD) utilizes a laminated film seal to seal an HDD cover-to-base interface. The laminated film seal may be constructed of a heat sealant layer hermetically-coupled to and forming a seal with the base, a barrier layer which inhibits gas from escaping from inside the HDD, and a film surface protective layer which protects the heat sealant and barrier layers. Embodiments may include a heat sealant layer comprising a thermoplastic polymer such as polypropylene, a barrier layer comprising a metal such as aluminum, and a film surface protective layer comprising a thermoplastic polymer such as polyethylene terephthalate.Type: ApplicationFiled: December 9, 2015Publication date: June 15, 2017Inventors: Kimihiko Sudo, Takako Hayakawa, Yuichi Arai, Yuta Onobu
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Publication number: 20170169861Abstract: A hermetically-sealed hard disk drive (HDD) utilizes a laminated film seal to seal an interface of an electrical flexible cable assembly and an HDD enclosure base. The laminated film seal may be constructed of a heat sealant layer that bonds with a surface of the base and a surface of the flex cable, a barrier layer which inhibits gas from escaping from inside the HDD, and a film surface protective layer which protects the heat sealant and barrier layers. Embodiments may include a heat sealant layer comprising a thermoplastic polymer such as polypropylene, a barrier layer comprising a metal such as aluminum, and a film surface protective layer comprising a thermoplastic polymer such as polyethylene terephthalate.Type: ApplicationFiled: December 9, 2015Publication date: June 15, 2017Inventors: Kimihiko Sudo, Takako Hayakawa, Yuichi Arai, Yuta Onobu
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Patent number: 7246813Abstract: A casing (32) included in a baby carriage folding mechanism is mounted on a substantially middle part of the handle of a folding baby carriage. Hinged joints (33) each having a stationary member (34) and a movable member (35) are connected to the opposite ends of the casing (32), and pipes (18) forming the handle are connected to the hinged joints (33), respectively. The pipes (18) are connected to the movable members (35) of the joints (33). Actuating members (38a and 38b) capable of being operated by an operating mechanism included in the casing (32) are connected to the movable members (35) of the hinged joints (33). The actuating members (38a and 38b) turn the movable members (35) relative to the corresponding stationary members (34) for folding and developing the folding baby carriage.Type: GrantFiled: December 27, 2005Date of Patent: July 24, 2007Assignee: Co{dot over (m)}bi CorporationInventors: Kojiro Yamazaki, Yuichi Arai, Mikiya Tanaka
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Patent number: 7229083Abstract: A stroller includes a stroller body and a basket support mechanism. The stroller body has two front legs, two rear legs, a handle, and a seat support part. The basket support mechanism has a basket support member disposed below the rear legs of the stroller body, and a flexible member disposed between the basket support member and a front upper part of the stroller body.Type: GrantFiled: December 3, 2004Date of Patent: June 12, 2007Assignee: Combi CorporationInventors: Yuichi Arai, Kazunao Ogura, Toshiro Yoshie
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Patent number: 7168728Abstract: A stroller is provided with a handle having a horizontal middle part and two side pipes. The two side pipes are connected to the horizontal middle part by gear trains so as to be turnable about axes perpendicular to an axis of the horizontal middle part, respectively. A folding part operating mechanism is incorporated into the horizontal middle part of the handle. The side pipes can be folded and unfolded relative to the horizontal middle part by turning the horizontal middle part about its axis.Type: GrantFiled: January 18, 2005Date of Patent: January 30, 2007Assignee: Combi CorporationInventors: Nobuhide Suga, Yuichi Arai, Toshiharu Hatano