Patents by Inventor Kei Hirano

Kei Hirano 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: 11938801
    Abstract: To provide a vehicle drive device capable of effectively driving a vehicle by using in-wheel motors without falling into the vicious cycle between enhancement of driving via the motors and an increase in vehicle weight. The present invention is a vehicle drive device that uses in-wheel motors to drive a vehicle and includes in-wheel motors (20) that are provided in wheels (2b) of a vehicle (1) and drive the wheels, a body side motor (16) that is provided in a body of the vehicle and drives the wheels of the vehicle, and a battery (18) and a capacitor (22) that supply electric power for driving the in-wheel motors and/or the body side motor, in which a voltage of the battery is applied to the body side motor and a voltage of the battery and the capacitor connected in series is applied to the in-wheel motors.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: March 26, 2024
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Isao Toda, Seiyo Hirano, Kei Yonemori, Hideki Sanai
  • Patent number: 11923862
    Abstract: A first reception processing unit performs a process of receiving a first signal transmitted on a first transmission line, a second reception processing unit performs a process of receiving a second signal transmitted on a second transmission line, and an output speed control unit controls output speeds of the first signal and the second signal subjected to the reception process. A system switching unit selects and outputs the first signal or the second signal subjected to a reception process, and an output processing unit performs a process for output to another apparatus on the output from the system switching unit. A reception side clock output unit outputs a clock signal giving a processing timing of each process, and a clock frequency control unit adjusts a frequency of the clock signal giving the processing timing to the output processing unit.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: March 5, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Fumikazu Inuzuka, Kei Kitamura, Akira Hirano, Masahito Tomizawa, Takuya Ohara
  • Patent number: 11916685
    Abstract: A transmission apparatus includes redundant first communication devices configured to communicate with a communication apparatus provided in a first network, and redundant second communication devices configured to communicate with a communication apparatus provided in a second network. The second communication devices include respective first ends that are ends of redundant communication paths of the first communication devices, and the first communication devices include respective second ends that are ends of redundant communication paths of the second communication devices.
    Type: Grant
    Filed: November 18, 2019
    Date of Patent: February 27, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Kei Kitamura, Fumikazu Inuzuka, Akira Hirano, Masahito Tomizawa, Takuya Ohara
  • Patent number: 8724430
    Abstract: A retrograde display mechanism of a timepiece includes a retrograde display mechanism main body having a time value driving wheel that rotates once every day and that has a time value finger which advances a time value including a date or a day. A time value transmitting wheel has a time value transmitting wheel tooth portion and a drive cam portion which are rotated by one tooth every day by the time value finger. A fan-shaped wheel operating lever has a cam follower portion and a fan-shaped wheel operating tooth portion engaged with the drive cam portion, and a fan-shaped wheel and a fan-shaped wheel display portion which mesh with the fan-shaped wheel operating tooth portion to rotate in response to rocking of the operating lever. The fan-shaped wheel rapidly rotates reversely to return to an initial position whenever the end of the month or the end of the week passes.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: May 13, 2014
    Assignee: Seiko Instruments Inc.
    Inventor: Kei Hirano
  • Patent number: 8279718
    Abstract: To provide a calendar mechanism wherein the building-in property of a second date indicator is improved, and an analog timepiece equipped therewith. A calendar mechanism of an analog timepiece includes a first date indicator which includes a first date character indication portion, a first date indicator gear portion, and an endless ring-shaped drive cam portion; a drive cam lever which includes an operating lever portion including a first fan-shaped gear portion, wherein a driven lever portion is spring loaded in order to become a cam follower, and the operating lever portion is pivoted in accordance with the driven lever portion abutting against the drive cam portion; a second date indicator which, being rotatable, includes a second date character indication portion and a second fan-shaped gear portion meshing with the first fan-shaped gear portion; and a positioning/locking portion.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: October 2, 2012
    Assignee: Seiko Instruments Inc.
    Inventor: Kei Hirano
  • Patent number: 8279717
    Abstract: To provide a calendar mechanism which can easily and reliably cause first and second date indicators to coincide in rotation phase, and an analog timepiece equipped therewith. A calendar mechanism of an analog timepiece includes a first date indicator including a first date character indication portion which indicates the ones column of the date, a first date indicator gear portion, and a drive cam portion which defines an endless ring-shaped cam face; a drive cam lever which includes a driven lever portion whose one end portion abuts against the drive cam portion, and an operating lever portion which includes a first fan-shaped gear portion at the leading end portion, the operating lever portion being pivoted in accordance with the driven lever portion; and a second date indicator which, being rotatable, includes a second date character indication portion which indicates the tens column of the date, and a second fan-shaped gear portion meshing with the first fan-shaped gear portion.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: October 2, 2012
    Assignee: Seiko Instruments Inc.
    Inventor: Kei Hirano
  • Publication number: 20120236691
    Abstract: A retrograde display mechanism of a timepiece includes a retrograde display mechanism main body having a time value driving wheel that rotates once every day and that has a time value finger which advances a time value including a date or a day. A time value transmitting wheel has a time value transmitting wheel tooth portion and a drive cam portion which are rotated by one tooth every day by the time value finger. A fan-shaped wheel operating lever has a cam follower portion and a fan-shaped wheel operating tooth portion engaged with the drive cam portion, and a fan-shaped wheel and a fan-shaped wheel display portion which mesh with the fan-shaped wheel operating tooth portion to rotate in response to rocking of the operating lever. The fan-shaped wheel rapidly rotates reversely to return to an initial position whenever the end of the month or the end of the week passes.
    Type: Application
    Filed: March 12, 2012
    Publication date: September 20, 2012
    Inventor: Kei HIRANO
  • Patent number: 7961556
    Abstract: The present invention aims to provide a day display apparatus having less risk of occurrence of a day hopping even when an impact caused by a drop or the like is applied and a watch having the same.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: June 14, 2011
    Assignee: Seiko Instruments Inc.
    Inventors: Kei Hirano, Tamotsu Ono
  • Publication number: 20110090767
    Abstract: To provide a calendar mechanism wherein the building-in property of a second date indicator is improved, and an analog timepiece equipped therewith. A calendar mechanism of an analog timepiece includes a first date indicator which includes a first date character indication portion, a first date indicator gear portion, and an endless ring-shaped drive cam portion; a drive cam lever which includes an operating lever portion including a first fan-shaped gear portion, wherein a driven lever portion is spring loaded in order to become a cam follower, and the operating lever portion is pivoted in accordance with the driven lever portion abutting against the drive cam portion; a second date indicator which, being rotatable, includes a second date character indication portion and a second fan-shaped gear portion meshing with the first fan-shaped gear portion; and a positioning/locking portion.
    Type: Application
    Filed: October 20, 2010
    Publication date: April 21, 2011
    Inventor: Kei Hirano
  • Publication number: 20110090766
    Abstract: To provide a calendar mechanism which can easily and reliably cause first and second date indicators to coincide in rotation phase, and an analog timepiece equipped therewith. A calendar mechanism of an analog timepiece includes a first date indicator including a first date character indication portion which indicates the ones column of the date, a first date indicator gear portion, and a drive cam portion which defines an endless ring-shaped cam face; a drive cam lever which includes a driven lever portion whose one end portion abuts against the drive cam portion, and an operating lever portion which includes a first fan-shaped gear portion at the leading end portion, the operating lever portion being pivoted in accordance with the driven lever portion; and a second date indicator which, being rotatable, includes a second date character indication portion which indicates the tens column of the date, and a second fan-shaped gear portion meshing with the first fan-shaped gear portion.
    Type: Application
    Filed: October 20, 2010
    Publication date: April 21, 2011
    Inventor: Kei Hirano
  • Publication number: 20090316534
    Abstract: The present invention aims to provide a day display apparatus having less risk of occurrence of a day hopping even when an impact caused by a drop or the like is applied and a watch having the same.
    Type: Application
    Filed: June 15, 2009
    Publication date: December 24, 2009
    Inventors: Kei Hirano, Tamotsu Ono
  • Patent number: 7609588
    Abstract: A multifunctional watch has a movement including first and second train wheel rotational centers each arranged at a position between a center of a main plate and an outline portion of the main plate. The first and second train wheel rotational centers are provided with respective first and second train wheel guide portions rotatably guiding respective first and second train wheel members about the respective first and second train wheel rotational centers. A first train wheel having the first train wheel member is arranged rotatably relative to the first train wheel rotational center for rotating one of the small hands only in a single direction of rotation to display the first calendar information. A second train wheel having the second train wheel member is arranged rotatably relative to the second train wheel rotational center for rotating another of the small hands only in a single direction of rotation to display the second calendar information.
    Type: Grant
    Filed: December 15, 2004
    Date of Patent: October 27, 2009
    Assignee: Seiko Instruments Inc.
    Inventors: Takeshi Tokoro, Kei Hirano, Mamoru Watanabe
  • Patent number: 7443768
    Abstract: There is realized a multifunction timepiece constituted to be able to constitute a plurality of types of hand operating train wheels by only changing positions of integrating parts without changing dimensions and shapes of parts of a movement. A movement of a multifunction timepiece includes a first train wheel rotation center, and a second train wheel rotation center. A train wheel for indicating calendar information is arranged to be rotatable relative to one of the first train wheel rotation center, and the second train wheel rotation center. When the first train wheel rotation center is arranged with a train wheel for indicating calendar information, the calendar information can be indicated by a small hand rotated to move by the train wheel, when the second train wheel rotation center is arranged with a fan shape hand operating train wheel for indicating the calendar information, the calendar information can be indicated by a small hand moved in a fan shape operating train wheel.
    Type: Grant
    Filed: December 15, 2004
    Date of Patent: October 28, 2008
    Assignee: Seiko Instruments Inc.
    Inventors: Mamoru Watanabe, Takeshi Tokoro, Kei Hirano
  • Publication number: 20080130419
    Abstract: There is realized a multifunction timepiece constituted to be able to constitute a plurality of types of hand operating train wheels by only changing positions of integrating parts without changing dimensions and shapes of parts of a movement. A movement of a multifunction timepiece includes a first train wheel rotation center, and a second train wheel rotation center. A train wheel for indicating calendar information is arranged to be rotatable relative to one of the first train wheel rotation center, and the second train wheel rotation center. When the first train wheel rotation center is arranged with a train wheel for indicating calendar information, the calendar information can be indicated by a small hand rotated to move by the train wheel, when the second train wheel rotation center is arranged with a fan shape hand operating train wheel for indicating the calendar information, the calendar information can be indicated by a small hand moved in a fan shape operating train wheel.
    Type: Application
    Filed: December 15, 2004
    Publication date: June 5, 2008
    Applicant: SEIKO INSTRUMENTS INC.
    Inventors: Mamoru Watanabe, Takeshi Tokoro, Kei Hirano
  • Publication number: 20070291593
    Abstract: To realize a multifunctional watch which is constituted so as to be capable of forming a plurality of movement layouts without changing sizes and shapes of components for the movement only by changing positions where the components are incorporated. A movement 201 of a multifunctional watch is provided with a first train wheel rotational center and a second train wheel rotational center. The first train wheel rotational center and the second train wheel rotational center are aligned on a position between a main plate center 202c of a main plate 202 and a main plate outline portion of the main plate 202. On the first train wheel rotational center and the second train wheel rotational center, a train wheel guide portion for rotatably guiding a train wheel member is disposed, respectively. A train wheel for displaying time information or calendar information is aligned rotatably for on of the first train wheel rotational center and the second train wheel rotational center.
    Type: Application
    Filed: December 15, 2004
    Publication date: December 20, 2007
    Inventors: Takeshi Tokoro, Kei Hirano, Mamoru Watanabe
  • Patent number: 7275860
    Abstract: A timepiece has a train wheel, a display member for undergoing rotation in accordance with rotation of the train wheel, and a display correcting mechanism for correcting a display content of the display member. The display correcting mechanism has a corrector setting transmission wheel mounted for undergoing rotation, a correction transmitting spring mounted for undergoing movement in accordance with rotation of the corrector setting transmission wheel, a correcting member for undergoing operation in accordance with rotation of the corrector setting transmission wheel and movement of the correction transmitting spring to correct a display content of a display member, and a hand setting stem mounted for undergoing rotation to rotate the corrector setting transmission wheel and move the correction transmitting spring to thereby operate the correcting member to correct the display content of the display member.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: October 2, 2007
    Assignee: Seiko Instruments Inc.
    Inventors: Kei Hirano, Shigeo Suzuki
  • Patent number: 7269102
    Abstract: To realize a small-sized analog multifunction timepiece by adopting a fan shape moving hand mechanism which does not use a hairspring. A multifunction timepiece of the invention is provided with a day display mechanism for operating a small hand moving in a fan shape. The day display mechanism is provided with a day indicator driving wheel, a day jumper, a small day wheel for displaying calendar information, a hammer constituted to rotate based on rotation of a day indicator transmission wheel, and a day return spring for exerting a rotational force to the small day wheel. By bringing a cam contact portion of the hammer to a transmission cam outer periphery portion and exerting an elastic force to a return cam outer shape portion by a return spring portion of the day return spring, the small day wheel is constituted to be exerted with a rotational force in a constant direction.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: September 11, 2007
    Assignee: Seiko Instruments Inc.
    Inventors: Kei Hirano, Mamoru Watanabe, Takeshi Tokoro
  • Patent number: 7269101
    Abstract: To realize an analog multifunction timepiece which is small sized and does not need much time period in operation of fabricating and integrating a part by adopting a fan shape moving hand mechanism without using a hairspring. A movement of a multifunction timepiece is provided with a calendar information display mechanism. The calendar information display mechanism is provided with a transmission wheel having a transmission cam portion, a display wheel constituted to rotate based on rotation of the transmission wheel and for displaying calendar information, a first hammer rotatably provided by being brought into contact with a transmission cam portion, and a second hammer rotatably provided in corporation with the display wheel. The first hammer includes a cam contact portion and an operating wheel portion. The second hammer is constituted to always receive a force of rotating in a constant direction.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: September 11, 2007
    Assignee: Seiko Instruments Inc.
    Inventors: Mamoru Watanabe, Takeshi Tokoro, Kei Hirano
  • Publication number: 20070201315
    Abstract: To provide a timepiece in which, when a rocking has been performed, a setting wheel does not run onto a gear wheel of a hand setting train wheel. A setting wheel meshes with a clutch whee at a time correction time, and a mesh with the clutch wheel is released at a time hand motion time while being placed upward than the time correction time. At the time correction time, in a minute wheel, a power mesh part receiving a power from the setting wheel meshes with the setting wheel. Further, at the time hand motion time, in the minute wheel, a mesh release prevention part having been provided in an upper part of the power mesh part prevents the mesh with the setting wheel from being released.
    Type: Application
    Filed: February 6, 2007
    Publication date: August 30, 2007
    Inventor: Kei Hirano
  • Patent number: 7215602
    Abstract: To realize an analog multifunction timepiece capable of realizing plural movement layouts including a fan shape moving hand train wheel by only changing positions of integrating parts without changing dimensions and shapes of the parts of movements. A movement of a multifunction timepiece is provided with a first train wheel rotational center, a second train wheel rotational center, a third train wheel rotational center and a fourth train wheel rotational center. Calendar information can be displayed by a small hand moving to rotate centering on the first train wheel rotational center and the second train wheel rotational center. Calendar information can be displayed by a small hand moving in a fan shape centering on the third train wheel rotational center and the fourth train wheel rotational center.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: May 8, 2007
    Assignee: Seiko Instruments Inc.
    Inventors: Kei Hirano, Mamoru Watanabe, Takeshi Tokoro