Patents by Inventor Takehiko Yazawa

Takehiko Yazawa 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: 10677333
    Abstract: A rotation transmission mechanism may include a drive wheel structured to rotate to one side, a driven wheel turned by the drive wheel to one side, and an urging member urging the driven wheel to turn to the other side. The drive wheel may include a drive teeth forming part where drive teeth structured to turn the driven wheel to the one side are provided at positions different from each other in an axial line direction, and a cam face forming part on which the driven wheel is slid. The driven wheel is provided with a driven teeth forming part where driven teeth provided at positions different from each other in an axial line direction are disposed over an angular range so that, when the drive wheel is turned to the one side, the drive teeth are sequentially abutted with the driven teeth.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: June 9, 2020
    Assignee: NIDEC SANKYO CORPORATION
    Inventors: Satoru Yokoe, Takehiko Yazawa
  • Publication number: 20200018415
    Abstract: Provided is a valve drive device including a power transmission switching unit capable of reducing noise and improving positional accuracy to perform smooth power switching. In the valve drive device, a valve element drive mechanism includes a motor, a driving gear, a driven gear, and a power transmission switching unit configured to switch between a power transmission state and a power non-transmission state. The power transmission switching unit includes at least one convex unit formed on the driven gear, a rotation restriction unit that is pivotably mounted on the driven gear with respect to the driven gear and engageable with the at least one convex unit, and a lever pivoting restriction unit formed on the driven gear and configured to restrict the rotation restriction unit from pivoting. The rotation restriction unit includes a pivot shaft and a lever unit.
    Type: Application
    Filed: July 11, 2019
    Publication date: January 16, 2020
    Inventors: Satoru YOKOE, Takehiko YAZAWA
  • Publication number: 20190293337
    Abstract: A drive device with an abnormality detection mechanism may include a drive source; a drive member to which power of the drive source is transmitted; a driven member operably coupled to the drive member; and a detector structured to output a signal in response to the driven member being turned in the second direction around the second axial line. The driven member may be structured such that, in response to the drive member being turned in a first direction around a first axial line, the driven member is turned in a first direction around a second axial line; and, in response to transmission of the power from the drive member being disconnected, the driven member is turned in a second direction around the second axial line.
    Type: Application
    Filed: March 13, 2019
    Publication date: September 26, 2019
    Inventors: Satoru YOKOE, Takehiko YAZAWA
  • Publication number: 20190093409
    Abstract: A rotation transmission mechanism may include a plurality of rotation transmission members having a drive wheel and a driven wheel, and an urging member which urges the driven wheel in a reverse direction to a rotational direction by power of the drive source. The drive wheel and the driven wheel are provided with engagement parts structured to transmit turning of the drive wheel to the driven wheel, the drive wheel is provided with a cam face forming part on which the engagement part of the driven wheel is slid at a rotational position where the engagement parts are not engaged with each other, and a brake member structured to generate a rotation load is disposed in a range on an upstream side of a power transmission path including the drive wheel with respect to the driven wheel in the power transmission path transmitting the power of the drive source.
    Type: Application
    Filed: September 20, 2018
    Publication date: March 28, 2019
    Inventors: Takehiko YAZAWA, Hiroyuki IWASHITA, Satoru YOKOE
  • Publication number: 20180340725
    Abstract: A damper device may include a frame structured of a tube part and an opening part formed on an inner side of the tube part, a baffle which is disposed on the inner side of the tube part and is supported by the frame in a state that the baffle is capable of being turned with a first edge as a turning center, and a baffle drive mechanism structured to turn the baffle between a closing position where the opening part is closed and an open position where the opening part is opened. The baffle is formed with a cut-out part at least one position of an edge except the first edge.
    Type: Application
    Filed: December 19, 2017
    Publication date: November 29, 2018
    Inventors: Takehiko Yazawa, Satoru Yokoe
  • Publication number: 20180340724
    Abstract: A switch mechanism may include a lever holding part which is provided in a case, a turnable lever provided with a shaft part turnably supported by the lever holding part and a first arm part and a second arm part protruded from the shaft part, an urging member structured to urge the turnable lever, and a switch whose state is switched by displacement of the turnable lever. The turnable lever is attached to the lever holding part in a state that the urging member is engaged between the first arm part and the second arm part, and the urging member is movable between an engaging position, where the urging member is engaged between the first arm part and the second arm part, and an engaging release position, where the urging member is engaged with the second arm part and is disengaged from the first arm part.
    Type: Application
    Filed: December 19, 2017
    Publication date: November 29, 2018
    Inventors: Takehiko YAZAWA, Satoru YOKOE, Akihiro ITO
  • Publication number: 20180172125
    Abstract: A rotation transmission mechanism may include a drive wheel structured to rotate to one side, a driven wheel turned by the drive wheel to one side, and an urging member urging the driven wheel to turn to the other side. The drive wheel may include a drive teeth forming part where drive teeth structured to turn the driven wheel to the one side are provided at positions different from each other in an axial line direction, and a cam face forming part on which the driven wheel is slid. The driven wheel is provided with a driven teeth forming part where driven teeth provided at positions different from each other in an axial line direction are disposed over an angular range so that, when the drive wheel is turned to the one side, the drive teeth are sequentially abutted with the driven teeth.
    Type: Application
    Filed: December 19, 2017
    Publication date: June 21, 2018
    Inventors: Satoru YOKOE, Takehiko YAZAWA
  • Publication number: 20170145611
    Abstract: A clutch device for a washing machine may include a second rotor body structured to engage with a first rotor body; a clutch member structured to displace the second rotor body; and a clutch member drive mechanism structured to move the clutch member between a connecting position and a disconnecting position. The clutch member drive mechanism may include a clutch motor structured to rotate in one direction; a crank mechanism comprising a crank member rotationally driven in one direction by the clutch motor and a link member which is swung reciprocatedly interlocked with rotation of the crank member to move the clutch member reciprocatedly; and a guide mechanism structured to guide the clutch member when the clutch member is reciprocated.
    Type: Application
    Filed: June 26, 2015
    Publication date: May 25, 2017
    Applicant: NIDEC SANKYO CORPORATION
    Inventors: Takehiko Yazawa, Akihiro ITO
  • Patent number: 6614139
    Abstract: A motor having a dynamic pressure bearing apparatus includes a fixed bearing member mounted to a motor frame, a rotating shaft member rotatably inserted with respect to the fixed bearing member and a lubricating fluid injected into a gap portion between the fixed bearing member and the rotating shaft member. The rotating shaft member is supported by a dynamic-pressure caused by the lubricating fluid. In addition, the motor frame is provided with a generally cylindrical bearing hold member that holds and fixes a bearing member. The bearing hold member includes a bearing contacting portion which abuts against the fixed bearing member or one part of the assembly including the fixed bearing member in an axial direction for positioning the fixed bearing member in a normal position in an axial direction.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: September 2, 2003
    Assignee: Sankyo Seiki Mfg. Co., Ltd.
    Inventors: Masayoshi Saichi, Takehiko Yazawa
  • Patent number: 6378209
    Abstract: In a dynamic pressure bearing device which has a shaft (3), a bearing (10) rotatable relative to the shaft (3), and capillary seal portions (13, 14) for holding a lubricating fluid (15) in a bearing clearance and in which the shaft (3) and the bearing (10) are relatively rotatably supported by dynamic pressure of the lubricating fluid (15) in the bearing clearance is scattered by centrifugal force so that the lubricating fluid (15) is kept in a constant quantity by the capillary seal portions (13, 14).
    Type: Grant
    Filed: April 21, 2000
    Date of Patent: April 30, 2002
    Assignees: Kabushiki Kaisha Sankyo Seiki Seisakusho, Seagate Technology Inc.
    Inventors: Masato Gomyo, Kazushi Miura, Ryuhei Matsuda, Tokio Tago, Takehiko Yazawa
  • Publication number: 20020047396
    Abstract: A motor having a dynamic pressure bearing apparatus includes a fixed bearing member mounted to a motor frame, a rotating shaft member rotatably inserted with respect to the fixed bearing member and a lubricating fluid injected into a gap portion between the fixed bearing member and the rotating shaft member. The rotating shaft member is supported by a dynamic-pressure caused by the lubricating fluid. In addition, the motor frame is provided with a generally cylindrical bearing hold member that holds and fixes a bearing member. The bearing hold member includes a bearing contacting portion which abuts against the fixed bearing member or one part of the assembly including the fixed bearing member in an axial direction for positioning the fixed bearing member in a normal position in an axial direction.
    Type: Application
    Filed: July 30, 2001
    Publication date: April 25, 2002
    Inventors: Masayoshi Saichi, Takehiko Yazawa
  • Patent number: 6375357
    Abstract: A potential-difference alleviating member for alleviating and lowering the potential difference, which is an energy difference between a rotating or fixed bearing member and a rotary hub or a fixing frame which are formed of metals of different types, is interposed between the two members so as to prevent the occurrence or advance of potential difference corrosion. Relief portions are respectively provided at a joining interface between a rotary shaft and a thrust plate and a joining interface between a bearing member and the counter plate, and the respective members are welded in the relief portions so as to be integrated.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: April 23, 2002
    Assignee: Kabushiki Kaisha Sankyo Seiki Seisakusho
    Inventors: Kazushi Miura, Masato Gomyo, Takayuki Narita, Tokio Tago, Takehiko Yazawa
  • Patent number: 6343877
    Abstract: A potential-difference alleviating member for alleviating and lowering the potential difference, which is an energy difference between a rotating or fixed bearing member and a rotary hub or a fixing frame which are formed of metals of different types, is interposed between the two members so as to prevent the occurrence or advance of potential difference corrosion. Relief portions are respectively provided at a joining interface between a rotary shaft and a thrust plate and a joining interface between a bearing member and the counter plate, and the respective members are welded in the relief portions so as to be integrated.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: February 5, 2002
    Assignee: Kabushiki Kaisha Sankyo Seiki Seisakusho
    Inventors: Kazushi Miura, Masato Gomyo, Takayuki Narita, Tokio Tago, Takehiko Yazawa
  • Publication number: 20020012483
    Abstract: A potential-difference alleviating member for alleviating and lowering the potential difference, which is an energy difference between a rotating or fixed bearing member and a rotary hub or a fixing frame which are formed of metals of different types, is interposed between the two members so as to prevent the occurrence or advance of potential difference corrosion. Relief portions are respectively provided at a joining interface between a rotary shaft and a thrust plate and a joining interface between a bearing member and the counter plate, and the respective members are welded in the relief portions so as to be integrated.
    Type: Application
    Filed: September 25, 2001
    Publication date: January 31, 2002
    Applicant: KABUSHIKI KAISHA SANKYO SEIKI SEISAKUSHO
    Inventors: Kazushi Miura, Masato Gomyo, Takayuki Narita, Tokio Tago, Takehiko Yazawa
  • Patent number: 6341896
    Abstract: A shaft member 21 the flexible, austenitic stainless steel is cold worked, and in the cold working process, a cold working ratio is increased, whereby a surface of the shaft member 21 is hardened. Therefore, there is no need for a nitriding treatment for the surface hardening. The corrosion proof performance of the passive coating possessed by the stainless steel is kept as intact.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: January 29, 2002
    Assignee: Kabushiki Kaisha Sankyo Seiki Seisakusho
    Inventors: Kazushi Miura, Masato Gomyo, Takayuki Narita, Tokio Tago, Takehiko Yazawa
  • Patent number: 5980819
    Abstract: A sintered oil-impregnated bearing 20 used in a bearing device 30 is made by molding a mixture of a composite fine particles (main material) and a solid lubricant previously added to the main material in a proportion of about one weight percent to about three weight percent, wherein the main material comprises composite fine particles composed of iron powders having surfaces coated with copper, and the solid lubricant comprises fine particles made of an inorganic compound such as molybdenum disulfide and having surfaces coated with copper, sintering the mold at a temperature in a range of 650.degree. C. to 700.degree. C. to form a sintered body 20b, and impregnating the sintered body 20b with lubricant oil. Since the sintered body 20b itself has lubricity, the sintered oil-impregnated bearing is free from abrasion or seizure even if oil is used up.
    Type: Grant
    Filed: March 12, 1998
    Date of Patent: November 9, 1999
    Assignee: Kabushiki Kaisha Sankyo Seiki Seisakusho
    Inventors: Hisaya Nakagawa, Toru Nakanishi, Michiaki Takizawa, Takehiko Yazawa