Patents Examined by Allen T. Cao
  • Patent number: 11031030
    Abstract: An automatic tonearm lifter for use in a turntable that includes a main body and a tonearm rotatably mounted on the main body. The tonearm lifter includes a casing adapted to be fixedly mounted to the main body of the turntable, a lifting unit adapted to be mounted to the main body, adapted for supporting the tonearm, movable relative to the casing along a vertical axis, and non-rotatable about the axis relative to the casing, and a rotating unit including a threaded seat that is rotatable about the axis and that is threadably engaging the lifting unit, and a driving module that is connected to the threaded seat and that is operable to drive rotation thereof, thereby moving the lifting unit along the axis.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: June 8, 2021
    Assignees: YA HORNG ELECTRONIC CO., LTD., THORENS GMBH
    Inventors: Jin-Yi Huang, Gunter Kuerten
  • Patent number: 11031038
    Abstract: A glass material of a glass spacer has a surface resistivity of 103 to 109 (?/sq) at 22 (° C.). The surface resistivity of a surface of the glass material of the glass spacer at 22 (° C.) is lower than the surface resistivity of an inner portion of the glass material at 22 (° C.). The glass spacer contains at least one oxide selected from the group consisting of TiO2, Nb2O5, WO3, and Bi2O3, as a glass component.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: June 8, 2021
    Assignee: HOYA CORPORATION
    Inventors: Shinji Eda, Kinobu Osakabe, Yoshitake Tanno, Mikio Ikenishi
  • Patent number: 11017801
    Abstract: A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and a record element located in a trailing gap between the main pole and the trailing magnetic shield. The record element includes an electrically conductive, non-magnetic material portion which is not part of a spin torque oscillator stack. The main pole and the trailing magnetic shield are electrically shorted by the record element across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the record element.
    Type: Grant
    Filed: January 18, 2019
    Date of Patent: May 25, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Venkatesh Chembrolu, Zhigang Bai, Yaguang Wei, Anna Zheng, Supradeep Narayana, Suping Song, Terence Lam, Michael Kuok San Ho, Changqing Shi, Lijie Guan, Jian-Gang Zhu
  • Patent number: 11017802
    Abstract: A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and a record element located in a trailing gap between the main pole and the trailing magnetic shield. The record element includes an electrically conductive, non-magnetic material portion which is not part of a spin torque oscillator stack. The main pole and the trailing magnetic shield are electrically shorted by the record element across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the record element.
    Type: Grant
    Filed: August 20, 2020
    Date of Patent: May 25, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Venkatesh Chembrolu, Zhigang Bai, Yaguang Wei, Anna Zheng, Supradeep Narayana, Suping Song, Terence Lam, Michael Kouk San Ho, Changqing Shi, Lijie Guan, Jian-Gang Zhu
  • Patent number: 11011192
    Abstract: An optically shielded (thermally assisted magnetic recording (TAMR) head comprises a perpendicular magnetic recording (PMR) write head and a near-field transducer (NFT) having an emerging peg at the air-bearing surface (ABS). Self-aligned optical side shields (SA-OSS) are formed using a self-aligning process that positions the shields symmetrically relative to the emergent peg of the NFT. As a result of the symmetric positioning the down-track and cross-track near-field and near-field gradients are significantly sharpened.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: May 18, 2021
    Assignee: Headway Technologies, Inc.
    Inventors: Weihao Xu, Ittetsu Kitajima, Cherng-Chyi Han, Xuhui Jin, Weisheng Hu, Ethan Lo
  • Patent number: 11011196
    Abstract: A spindle motor includes a rotating part, a base member, a connector, and a connector accommodating recess in the base member. The connector accommodating recess includes a bottom surface and an annular wall surface extending from the bottom surface to the outer surface. A through-hole is formed in the bottom surface. The bottom surface includes a first annular surface extending toward the annular wall surface from a peripheral edge of the through-hole, and a second annular surface extending around the first annular surface on an axial outer surface side of the base member relatively to the first annular surface. The connector contacts the second annular surface. A first gap between the connector and the first annular surface is filled with an adhesive. An interface of the adhesive extends i to protrude from an inner peripheral surface of the through-hole over an entire circumference of the through-hole.
    Type: Grant
    Filed: August 27, 2020
    Date of Patent: May 18, 2021
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Hideaki Showa, Atsushi Yanagawa
  • Patent number: 11004464
    Abstract: According to one embodiment, a magnetic head includes first and second shields, a magnetic pole, a first magnetic layer, and a first nonmagnetic member. The first shield includes first, second, and third partial regions. A first direction is from the second toward third partial region. The first partial region is between the second and third partial regions. A second direction from the first toward second shield crosses the first direction. The magnetic pole between the second and third partial regions in the first direction is provided between the first partial region and the second shield in the second direction. The first magnetic layer is provided between the magnetic pole and the second shield. The first nonmagnetic member includes first and second portions. The first portion is between the magnetic pole and the first magnetic layer. The second portion is between the second partial region and the second shield.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: May 11, 2021
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
    Inventors: Hirofumi Suto, Naoyuki Narita, Tazumi Nagasawa, Masayuki Takagishi, Hitoshi Iwasaki, Tomoyuki Maeda
  • Patent number: 10998008
    Abstract: The present disclosure generally relates to an interface connector in a tape embedded drive. The tape embedded drive has two long edges and two short edges. Within the tape embedded drive, there are numerous guide rollers, at least three feedthrough connectors, and two reels. The interface connector is located along one of the short edges and underneath one of the two reels. By placing the interface connector at that location, the tape embedded drive has sufficient real estate for all of the necessary reels, feedthrough connectors, and guide rollers while also ensuring stability of the tape embedded drive.
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: May 4, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Kouki Uefune, Hajime Eguchi, Toshio Takahashi
  • Patent number: 10998009
    Abstract: A hard disk drive includes a base deck and a load/unload ramp component. The base deck includes a floor and sidewalls. The load/unload ramp component is coupled to the floor of the base deck. At least one of the sidewalls includes an arcuate extension portion that extends to contact the load/unload ramp component.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: May 4, 2021
    Assignee: Seagate Technology LLC
    Inventors: Yichao Ma, Yimin Niu, Xiong Liu, Lionel Young
  • Patent number: 10997998
    Abstract: 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: Grant
    Filed: June 24, 2020
    Date of Patent: May 4, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Kouki Uefune, Toshio Takahashi, Takako Hayakawa, Yuichi Arai
  • Patent number: 10978098
    Abstract: According to the embodiment, a magnetic recording device includes a magnetic head, a magnetic recording medium, and an electrical circuit. The magnetic head includes a magnetic pole, a first shield, and a stacked body provided between the magnetic pole and the first shield. The stacked body includes first, and second magnetic layers, first, second, and third nonmagnetic layers. An electrical resistance of the stacked body is a first resistance when a current flowing in the stacked body is a first current. The electrical resistance is a second resistance when the current flowing in the stacked body is a second current. The electrical resistance oscillates when the current flowing in the stacked body is a third current. The electrical circuit is configured to supply the second current to the stacked body in a recording operation of using the magnetic head to record information in the magnetic recording medium.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: April 13, 2021
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICE & STORAGE CORPORATION
    Inventors: Naoyuki Narita, Masayuki Takagishi, Hirofumi Suto, Hitoshi Iwasaki, Tazumi Nagasawa, Tomoyuki Maeda
  • Patent number: 10978100
    Abstract: An approach to a reduced-head hard disk drive involves an actuator subsystem that includes a ball screw cam assembly wherein the number of starts of a multi-start lead screw equals the number of balls riding in a corresponding start. A stepper motor may be employed to drive rotation of a pulley or gear to which a drive belt or drive chain is attached, to transmit power to the lead screw via the drive belt or chain, thereby driving rotation of the lead screw to drive translation of an actuator arm assembly along the axis of the lead screw so that a corresponding pair of read-write heads can access different magnetic-recording disks of a multiple-disk stack.
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: April 13, 2021
    Assignee: Western Digital Technologies, Inc.
    Inventor: David K. Myers
  • Patent number: 10964340
    Abstract: A recording head has a near-field transducer proximate a media-facing surface of the recording head. The near-field transducer extends a first distance away from the media-facing surface. A waveguide overlaps and delivers light to the near-field transducer. Two subwavelength focusing mirrors are at an end of the waveguide proximate the media-facing surface and extend a second distance away from the media-facing surface that is less than the first distance. The subwavelength mirrors are on opposite crosstrack sides of the near-field transducer and separated from each other by a crosstrack gap. The subwavelength focusing mirrors each include a first material at the media-facing surface; and a second material facing away from the media facing surface and in contact with the first material. The second material includes a plasmonic material, and the first material is more mechanically robust than the second material.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: March 30, 2021
    Assignee: Seagate Technology LLC
    Inventors: Weibin Chen, Nan Zhou, Ruoxi Yang, Michael Allen Seigler
  • Patent number: 10964343
    Abstract: According to one embodiment, a disk device includes two magnetic disks opposing each other at intervals of 1.2 to 1.5 mm, and at least two suspension assemblies movable respectively between the two magnetic disks. Each of the suspension assemblies includes a base plate, a load beam extending from the base plate, a tab extending from a distal end of the load beam, a wiring member on the load beam and the base plate, including a gimbal portion, and a magnetic head on the gimbal portion, abutting on a dimple of the load beam via the gimbal portion. The ratio of a distance from a bendable location of the load beam to a center of the dimple with respect to a distance from the center of the dimple to a tip of the tab is 2.8 to 3.8.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: March 30, 2021
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Manabu Uehara
  • Patent number: 10950263
    Abstract: Disclosed herein is an apparatus that comprises an actuator arm that is pivotably connectable to a pivot post at a proximal end. The actuator arm extends linearly along a first axis from the proximal end to a distal end. The apparatus also comprises a lift tab that comprises an elongate member. The elongate member comprises a proximal end, coupled to the distal end of the actuator arm, and a distal end. The elongate member extends linearly along a second axis from the proximal end to the distal end. The second axis intersects the first axis to define an angle between the first axis and the second axis. The distal end of the elongate member is configured to engage an incline member when the actuator arm is in an unload position to lift the actuator arm.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: March 16, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Kia Moh Teo, Yanning Liu
  • Patent number: 10943621
    Abstract: A method for designing an enclosure using an idealized hard drive disk (HDD) vibration threshold datasets for an experimental enclosure, where the enclosure is a modified version of the experimental enclosure. The method includes generating HDD vibration threshold datasets, obtaining HDD performance datasets based on the HDD vibration threshold datasets and historical enclosure vibration datasets, comparing the HDD performance datasets to the historical HDD performance datasets, calculating fitness scores for each of the HDD vibration threshold datasets based on the comparison, and designating, based on the fitness scores, an HDD vibration threshold dataset of the HDD vibration threshold datasets as the ideal HDD vibration threshold dataset.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: March 9, 2021
    Assignee: Dell Products L.P.
    Inventor: Daniel J. Carey
  • Patent number: 10937450
    Abstract: A spin transfer torque reversal assisted magnetic recording (STRAMR) device is disclosed wherein a flux guiding layer (FGL) magnetization flips to an opposite direction opposing the write gap (WG) field because of spin torque from an adjacent spin polarization (SP) layer and spin injection layer (SIL) when a current (Ia) of sufficient density is applied across the device and between the main pole (MP) and trailing shield (TS) thereby enhancing the MP write field. The SP layer adjoins the MP or TS and maintains a magnetization in the WG field direction. One or both of the SIL and FGL has a spin polarization from ?0.4 to 0.3 and may be doped with C, N, or B so that the extent of FGL flipping is greater at a given current density than in the prior art where all magnetic layers within the STRAMR device have a positive spin polarization ?0.4.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: March 2, 2021
    Assignee: Headway Technologies, Inc.
    Inventors: Shohei Kawasaki, Wenyu Chen, Tetsuya Roppongi
  • Patent number: 10930308
    Abstract: A slide actuator includes a fixed member, a movable member capable of reciprocating in a predetermined direction with respect to the fixed member, a plurality of balls interposed between the fixed member and the movable member and configured to movably support the movable member, a retainer interposed between the respective balls and configured to keep an interval between the respective balls constant and reciprocate in a predetermined stroke range, a wall portion of the fixed member provided in a moving direction of the retainer, and a retainer spring configured to couple the wall portion and the retainer. The retainer spring is disposed to suppress displacement of the retainer in the moving direction. A spring constant of the retainer spring is set to a value for causing sliding friction in the balls and pushing back the retainer in a range in which the retainer moves beyond the predetermined stroke range.
    Type: Grant
    Filed: October 13, 2020
    Date of Patent: February 23, 2021
    Assignee: OLYMPUS CORPORATION
    Inventor: Ken Ogata
  • Patent number: 10930320
    Abstract: According to one embodiment, a disk device includes a disk-shaped recording medium, a head which processes data on the recording medium, and a housing accommodating the recording medium and the head. The housing includes a base with a side wall, and a cover having a welded portion welded to the side wall by laser welding. The welded portion includes a first welded portion welded to a first region of the side wall and having weld beads with a first shape, and a second welded portion welded to a second region of the side wall and having welded beads with a second shape different from the first shape.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: February 23, 2021
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Makoto Okamoto, Yasutaka Sasaki
  • Patent number: 10916265
    Abstract: A piezoelectric actuator assembly is described. The piezoelectric actuator assembly includes a first, second and third active piezoelectric layers. The first layer includes a top surface and a bottom surface. The second layer includes a top surface and a bottom surface over the top surface of the first layer. The third layer includes a top surface and a bottom surface over the top surface of the second layer. The first and second layers can define a first effective electrode length. Similarly, the second and third layers can define a second effective electrode length configured to be longer than the first effective electrode length.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: February 9, 2021
    Assignee: Magnecomp Corporation
    Inventors: Long Zhang, Kuen Chee Ee, David Glaess, Preecha Sudachun, Ekaratch Pankaew