Patents by Inventor Shokichi Toyokawa

Shokichi Toyokawa 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: 7540005
    Abstract: A disk drive 1 of the invention has through holes 27 formed in a turntable 4 in such a manner as to surround circumferentially a spindle 5, dislodgement preventive portions 28 provided to extend from a lower surface of a disk holding portion 9 towards a base portion 2 through the through holes 27, a hook locking portion 29 formed on an outer circumferential wall of a bearing holding portion 15 and hook portions 30 formed on distal end portions of the dislodgement preventive portions 28 which lie to a side of the base portion 2. In addition, the base portion 2 of the disk drive 1 of the invention includes a plurality of openings into which respective coils 20 are partially inserted and is configured such that an outer circumferential portion of a stator core 19a and the base portion 2 are spaced apart from each other at a predetermined interval.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: May 26, 2009
    Assignee: Panasonic Corporation
    Inventors: Shokichi Toyokawa, Masato Kudo
  • Publication number: 20060130089
    Abstract: A disk drive 1 of the invention has through holes 27 formed in a turntable 4 in such a manner as to surround circumferentially a spindle 5, dislodgement preventive portions 28 provided to extend from a lower surface of a disk holding portion 9 towards a base portion 2 through the through holes 27, a hook locking portion 29 formed on an outer circumferential wall of a bearing holding portion 15 and hook portions 30 formed on distal end portions of the dislodgement preventive portions 28 which lie to a side of the base portion 2. In addition, the base portion 2 of the disk drive 1 of the invention includes a plurality of openings into which respective coils 20 are partially inserted and is configured such that an outer circumferential portion of a stator core 19a and the base portion 2 are spaced apart from each other at a predetermined interval.
    Type: Application
    Filed: December 15, 2005
    Publication date: June 15, 2006
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shokichi Toyokawa, Masato Kudo
  • Patent number: 6943471
    Abstract: This motor comprises a core, a drive coil wound on the core, a housing, and a stator having an insulator for insulating the drive coil formed one-piece with the housing. Further, the motor comprises a stator casing for encasing the stator, and a rotor disposed outside the stator. Inside the housing is disposed a bearing for supporting the rotary shaft of the rotor, and an oil retainer disposed so as to partially come in contact with the bearing is stored in a storing section provided in either one of the housing and the stator casing.
    Type: Grant
    Filed: June 22, 2004
    Date of Patent: September 13, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shokichi Toyokawa, Toshifumi Tsutsumi, Katsuaki Abe, Yukio Oishi, Hitoshi Shirakura
  • Publication number: 20040256933
    Abstract: This motor comprises a core, a drive coil wound on the core, a housing, and a stator having an insulator for insulating the drive coil formed one-piece with the housing. Further, the motor comprises a stator casing for encasing the stator, and a rotor disposed outside the stator. Inside the housing is disposed a bearing for supporting the rotary shaft of the rotor, and an oil retainer disposed so as to partially come in contact with the bearing is stored in a storing section provided in either one of the housing and the stator casing.
    Type: Application
    Filed: June 22, 2004
    Publication date: December 23, 2004
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD
    Inventors: Shokichi Toyokawa, Toshifumi Tsutsumi, Katsuaki Abe, Yukio Oishi, Hitoshi Shirakura