Patents by Inventor Takashi Niwa

Takashi Niwa 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: 11118549
    Abstract: A cover for a fuel tank includes a flange unit configured to close an opening of the fuel tank and a joint member connected to the flange unit. The joint member is movable in an upward/downward direction. The flange unit includes a side tubular portion extending in the upward/downward direction. The joint member includes a support column portion extending in the upward/downward direction. The support column portion is movably disposed in the side tubular portion so as to be movable in the upward/downward direction. The support column portion is connected to the side tubular portion by a snap-fit so as to be movable and suspendable in the upward/downward direction.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: September 14, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Satoshi Ito, Koji Yoshida, Kensuke Niwa, Masashi Go, Takashi Kanie
  • Patent number: 10067475
    Abstract: A timepiece is equipped with a movement, a timepiece case accommodating the movement, and a hollow tubular structure portion having a connection proximal portion directly or indirectly in contact with the movement. The hollow tubular structure portion is formed such that a space defined between itself and the timepiece case is hermetically sealed. The inner space of the hollow tubular structure portion communicates with the exterior of the timepiece case via an external opening of the timepiece case. The timepiece can secure a sufficient waterproof performance and can transmit sound from a sound source efficiently to the exterior.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: September 4, 2018
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Takashi Niwa, Takuma Kawauchiya, Masahiro Nakajima
  • Patent number: 9817369
    Abstract: To provide a mechanical component, a mechanical component manufacturing method, a movement, and a timepiece allowing the forcing-in portion to be firmly fixed to the shaft member, providing a sufficient buffer effect, and capable of precisely determining the outer diameter dimension. Provided is a mechanical component rotating around a shaft member. This mechanical component includes: a component main body having a through-hole through which the shaft member is passed; and a forcing-in portion formed on the inner surface of the through-hole and fixed to the shaft member through the forcing-in of the shaft member. The component main body has a retaining recess constituting an anchor structure regulating displacement of the forcing-in portion with respect to the component main body. The forcing-in portion is formed of a metal material.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: November 14, 2017
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Sachiko Tanabe, Takashi Niwa, Masahiro Nakajima
  • Publication number: 20170315509
    Abstract: To provide a mechanical component, a mechanical component manufacturing method, a movement, and a timepiece allowing the forcing-in portion to be firmly fixed to the shaft member, providing a sufficient buffer effect, and capable of precisely determining the outer diameter dimension. Provided is a mechanical component rotating around a shaft member. This mechanical component includes: a component main body having a through-hole through which the shaft member is passed; and a forcing-in portion formed on the inner surface of the through-hole and fixed to the shaft member through the forcing-in of the shaft member. The component main body has a retaining recess constituting an anchor structure regulating displacement of the forcing-in portion with respect to the component main body. The forcing-in portion is formed of a metal material.
    Type: Application
    Filed: July 19, 2017
    Publication date: November 2, 2017
    Inventors: Sachiko TANABE, Takashi NIWA, Masahiro NAKAJIMA
  • Patent number: 9753433
    Abstract: A mechanical component includes a component main body having a through-hole through which a shaft member is passed, and a forcing-in portion made of metal material formed on the inner surface of the through-hole and fixed to the shaft member through the forcing-in of the shaft member. The component main body has a retaining recess and the forcing-in portion fills the inner space of the retaining recess so that the retaining recess constitutes an anchor structure regulating displacement of the forcing-in portion with respect to the component main body.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: September 5, 2017
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Sachiko Tanabe, Takashi Niwa, Masahiro Nakajima
  • Publication number: 20170212475
    Abstract: A timepiece which can secure a sufficient waterproof performance and which can transmit sound from a sound source efficiently to the exterior is provided. The timepiece is equipped with a movement, a timepiece case accommodating the movement, and a hollow structure portion having a connection proximal portion directly or indirectly in contact with the movement. The hollow structure portion is formed such that a space defined between itself and the timepiece case is of a hermetic structure. The inner space of the hollow structure portion communicates with the external space via an external opening of the timepiece case.
    Type: Application
    Filed: January 16, 2017
    Publication date: July 27, 2017
    Inventors: Takashi NIWA, Takuma KAWAUCHIYA, Masahiro NAKAJIMA
  • Patent number: 9678477
    Abstract: A mechanical component configured to rotate with a shaft member includes a component main body having a through-hole through which the shaft member is passed, and one or more shaft support portions formed on the inner surface of the through-hole to fix the shaft member to the component main body. The one or more shaft support portions protrude from the inner surface of the through-hole and are capable of retaining the shaft member due to an elastic force. The one or more shaft support portions are made of material having a larger elongation percentage than that of the material of the component main body thereby preventing breakage of the mechanical component due to stress created when the shaft member is forced through the through-hole in the component main body.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: June 13, 2017
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Sachiko Tanabe, Takashi Niwa, Masahiro Nakajima
  • Patent number: 9665069
    Abstract: An electric generator device includes a swinging part, a storage part, a vibration energy generating part, and an electric generator part. The swinging part swings in position due to external swing. The storage part stores a swing power of the swinging part. The vibration energy generating part generates, by the power stored at the storage part, vibration energy having its amplitude and frequency adjusted. The electric generator part converts the vibration energy generated at the vibration energy generating part to electric power. The vibration energy generating part comprises a pendulum to be in contact with a rotary part which is rotated by the power stored at the storage part, thereby to adjust the rotational speed of the rotary part.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: May 30, 2017
    Assignee: Asahi Glass Company, Limited
    Inventors: Yoshiki Hamatani, Masahiro Nakajima, Takashi Niwa, Miei Konishi, Toru Ozaki
  • Patent number: 9568887
    Abstract: To provide an operation stabilizing mechanism, a movement, and a mechanical timepiece allowing a reduction in size while achieving an enhancement in rate precision. An operation stabilizing mechanism includes: an outer carriage and an inner carriage provided so as to be mutually rotatable; a constant-force spring provided between the outer carriage and the inner carriage and configured to impart a rotational force to the inner carriage such that the inner carriage rotates with respect to the outer carriage; a stop wheel provided on the outer carriage; and a stopper configured to perform engaging and releasing operations on the stop wheel upon the rotation of the inner carriage, wherein the rotational axis of the outer carriage and the rotation axis of the inner carriage cross each other.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: February 14, 2017
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Takuma Kawauchiya, Masahiro Nakajima, Takashi Niwa, Masayuki Koda
  • Publication number: 20160266547
    Abstract: To provide an operation stabilizing mechanism, a movement, and a mechanical timepiece allowing a reduction in size while achieving an enhancement in rate precision. An operation stabilizing mechanism includes: an outer carriage and an inner carriage provided so as to be mutually rotatable; a constant-force spring provided between the outer carriage and the inner carriage and configured to impart a rotational force to the inner carriage such that the inner carriage rotates with respect to the outer carriage; a stop wheel provided on the outer carriage; and a stopper configured to perform engaging and releasing operations on the stop wheel upon the rotation of the inner carriage, wherein the rotational axis of the outer carriage and the rotation axis of the inner carriage cross each other.
    Type: Application
    Filed: March 2, 2016
    Publication date: September 15, 2016
    Inventors: Takuma KAWAUCHIYA, Masahiro NAKAJIMA, Takashi NIWA, Masayuki KODA
  • Publication number: 20160170377
    Abstract: To provide an electric generator device excellent in power generation efficiency, and a timepiece movement and timepiece provided with the electric generator device. The electric generator device 5 comprises a swinging part 61A which swings in position due to external swing, a storage part 20A to store swing power of the swinging part 61A, a vibration energy generating part 40A to generate, by the power stored at the storage part 20A, vibration energy with its amplitude and frequency adjusted, and an electric generator part 70 to convert the vibration energy generated at the vibration energy generating part 40A to electric power. The electric generator device 5 is provided on a timepiece; the swinging part 61A is a rotary weight 61; the storage part 20A is a barrel wheel 20; and the vibration energy generating part 40A is an escapement governor 40. The electric generator part 70 is provided with a first electrode 71, a second electrode and an electret film.
    Type: Application
    Filed: February 22, 2016
    Publication date: June 16, 2016
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Yoshiki HAMATANI, Masahiro NAKAJIMA, Takashi NIWA, Miei KONISHI, Toru OZAKI
  • Patent number: 9310772
    Abstract: A metal structure includes, by mass %, Fe: 10% to 30%; S: 0.005% to 0.2%; and the balance consisting of Ni and unavoidable impurities, in which a maximum grain size of the metal structure is 500 nm or less. The metal structure preferably has one or more of a stress relaxation rate of 10% or less, a lattice constant of 3.535 ? to 3.56 ?, a yield stress of 1500 MPa or more, a Young's modulus of 150 GPa or more and a Vickers hardness of Hv 580 or more.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: April 12, 2016
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Miei Konishi, Matsuo Kishi, Takashi Niwa
  • Publication number: 20160077491
    Abstract: To provide a mechanical component, a mechanical component manufacturing method, a movement, and a timepiece which are free from breakage due to the forcing-in of the shaft member and which allow the mechanical component to be reliably fixed to the shaft member. Provided is a mechanical component configured to rotate around a shaft member. The mechanical component includes: a component main body having a through-hole through which the shaft member is passed; and one or a plurality of shaft support portions formed on the inner surface of the through-hole and serving to fix the shaft member to the component main body. The shaft support portion(s) protrude (s) from the inner surface of the through-hole and is (are) capable of retaining the shaft member due to an elastic force. The elongation percentage of the shaft support portion(s) is larger than the elongation percentage of the component main body.
    Type: Application
    Filed: September 1, 2015
    Publication date: March 17, 2016
    Inventors: Sachiko TANABE, Takashi NIWA, Masahiro NAKAJIMA
  • Publication number: 20160077490
    Abstract: To provide a mechanical component, a mechanical component manufacturing method, a movement, and a timepiece allowing the forcing-in portion to be firmly fixed to the shaft member, providing a sufficient buffer effect, and capable of precisely determining the outer diameter dimension. Provided is a mechanical component rotating around a shaft member. This mechanical component includes: a component main body having a through-hole through which the shaft member is passed; and a forcing-in portion formed on the inner surface of the through-hole and fixed to the shaft member through the forcing-in of the shaft member. The component main body has a retaining recess constituting an anchor structure regulating displacement of the forcing-in portion with respect to the component main body. The forcing-in portion is formed of a metal material.
    Type: Application
    Filed: September 1, 2015
    Publication date: March 17, 2016
    Inventors: Sachiko TANABE, Takashi NIWA, Masahiro NAKAJIMA
  • Patent number: 9235193
    Abstract: A temperature compensation-type balance includes a balance staff, and a balance wheel having a plurality of bimetal portions disposed in parallel to each other in a circumferential direction around a rotation axis of the balance staff. Connection members connect respective ones of the plurality of bimetal portions and the balance staff. Each bimetal portion is a layered body in which a first member and a second member are radially overlapped, and one end portion in the circumferential direction is a fixed end connected to a respective connection member and the other end portion in the circumferential direction is a free end. The first member is formed of a ceramic material, and the second member is formed of a metal material having a thermal expansion coefficient different from that of the first member.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: January 12, 2016
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Takashi Niwa, Masahiro Nakajima, Takuma Kawauchiya, Hisashi Fujieda, Manabu Shinke
  • Patent number: 9188956
    Abstract: A balance includes a balance staff pivotally supported rotatably and a balance wheel arranged around the balance staff. The balance wheel has one end portion fixed to a connection arm radially connected to the balance staff and a free end portion configured to be radially deformed. The balance wheel has a first rim connected to the connection arm and a second rim in overlapping relation with the first rim and formed of a material having a linear expansion coefficient different from the first rim. The first and second rims are arranged in a circumferential direction and are bonded together by melting portions formed of melted materials of the first and second rims. The melting portions are formed on upper and lower surfaces of and in an intermediate position between the first and second rims.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: November 17, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Masahiro Nakajima, Takashi Niwa, Takuma Kawauchiya
  • Patent number: 9164486
    Abstract: An operation stabilization mechanism has a first carriage to which a rotational drive force of a train wheel is transmitted and which is rotatably supported with respect to a main plate, and a second carriage rotatably supported with respect to the first carriage. A constant-force spring is provided between the first carriage and the second carriage and is configured to impart a rotational force to the second carriage so that the second carriage undergoes rotation with respect to the first carriage. An escapement/governor mechanism is mounted in the second carriage and is configured to be driven by a rotational torque generated through rotation of the second carriage and transmitted to the escapement/governor mechanism. A stopper lever is mounted to undergo rotational movement relative to the first carriage for suppressing fluctuations in the rotational torque transmitted to the escapement/governor mechanism.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: October 20, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Takuma Kawauchiya, Takashi Niwa, Masahiro Nakajima, Masayuki Koda
  • Patent number: 9128465
    Abstract: To provide a timepiece balance with hairspring capable of changing the moment of inertia of the balance wheel without involving generation of a one-sidedness in weight. There is provided a balance with hairspring including a balance staff, and a balance wheel arranged around the balance staff, wherein there are provided a first rim constituting the balance wheel and having a guide portion configured to vary in the distance from the balance staff in correspondence with a peripheral direction around the balance staff, an elastic portion arranged so as to be slidable along the guide portion and capable of elastic deformation in the radial direction around the balance staff, and a second rim having a plurality of weight portions arranged in the peripheral direction.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: September 8, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Takuma Kawauchiya, Takashi Niwa, Masahiro Nakajima
  • Publication number: 20150185700
    Abstract: To provide a timepiece balance with hairspring capable of changing the moment of inertia of the balance wheel without involving generation of a one-sidedness in weight. There is provided a balance with hairspring including a balance staff, and a balance wheel arranged around the balance staff, wherein there are provided a first rim constituting the balance wheel and having a guide portion configured to vary in the distance from the balance staff in correspondence with a peripheral direction around the balance staff, an elastic portion arranged so as to be slidable along the guide portion and capable of elastic deformation in the radial direction around the balance staff, and a second rim having a plurality of weight portions arranged in the peripheral direction.
    Type: Application
    Filed: December 17, 2014
    Publication date: July 2, 2015
    Inventors: Takuma KAWAUCHIYA, Takashi NIWA, Masahiro NAKAJIMA
  • Patent number: 9052693
    Abstract: There are provided a constant force device, a movement, and a mechanical timepiece which can decrease a loss of power for controlling rotation of a stop wheel & pinion.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: June 9, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Takuma Kawauchiya, Takashi Niwa, Masahiro Nakajima, Masayuki Koda