Patents by Inventor Akihiko Nishikawa

Akihiko Nishikawa 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: 10696122
    Abstract: An annular reference surface is formed around a through-hole of an eye portion. A distal-end-side curved portion is formed at a first corner portion, on an outer side of the annular reference surface. The thickness of the distal-end-side curved portion is reduced in a range of a length from the first flat surface toward the distal end surface. A hole-side curved portion whose thickness is reduced toward an inner surface of the through-hole is formed at a second corner portion, on an inner side of the annular reference surface. The length of the hole-side curved portion is less than the length of the distal-end-side curved portion. The hole-side curved portion is curved with a greater curvature than that of the distal-end-side curved portion.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: June 30, 2020
    Assignee: NHK SPRING CO., LTD.
    Inventors: Yasuharu Sakurai, Yoshihiro Koshita, Akihiko Nishikawa, Akifumi Otani
  • Publication number: 20200139783
    Abstract: A stabilizer includes bend sections. With respect to positions in a circumferential direction of a radial cross section of each of the bend sections, a center of an inside of a bend is defined as 0°, and a center of an outside of the bend is defined as 180°. The bend sections each include a bend interior section located at 0°, a bend exterior section located at 180°, a first side section located at 90°, and a second side section located at 270°. The bend interior section has compressive residual stress from a surface to a first depth. The bend exterior section has compressive residual stress to a second depth. The first side section has compressive residual stress to a third depth. The second side section has compressive residual stress to a fourth depth.
    Type: Application
    Filed: January 8, 2020
    Publication date: May 7, 2020
    Applicant: NHK SPRING CO., LTD.
    Inventors: Yasuharu SAKURAI, Yoshihiro KOSHITA, Akihiko NISHIKAWA, Akifumi OTANI
  • Patent number: 10589590
    Abstract: A stabilizer includes a stabilizer main body, and eyes formed on both ends of the stabilizer main body. Through-holes are formed in fastening surfaces of the eyes, respectively. The stabilizer main body is covered with a main body coating film. The eye is covered with an eye coating film whose thickness is less than a thickness of the main body coating film. An inner surface of the through-hole is covered with an inner surface coating film. An incomplete coating portion is formed at a part of the inner surface of the through-hole in a circumferential direction. The incomplete coating portion is located on an extension of a straight line connecting a center of the through-hole and the center of gravity of the stabilizer main body in a side view of the stabilizer main body.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: March 17, 2020
    Assignee: NHK SPRING CO., LTD.
    Inventors: Yasuharu Sakurai, Yoshihiro Koshita, Akihiko Nishikawa, Akifumi Otani
  • Publication number: 20200036244
    Abstract: According to the present invention, provided is an IPM rotor of the present invention, which includes a plurality of core sheets, having hole portions configured to accommodate magnets and being laminated on one another, and the magnets are inserted in the hole portions. The IPM rotor includes a first core sheet having a spring plate portion provided to the hole portion, and a second core sheet having a recessed portion provided the hole portion. A protruding portion is provided to the hole portion of at least one of the plurality of the laminated core sheets. The protruding portion is provided to at least one of the hole portion of the first core sheet, the hole portion of the second core sheet, or a hole portion of a third core sheet to be further arranged.
    Type: Application
    Filed: April 12, 2017
    Publication date: January 30, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroshi AIDA, Masafumi OKAZAKI, Yuji TAKIZAWA, Satoru AKUTSU, Hideya NISHIKAWA, Akihiko MORI
  • Patent number: 10461488
    Abstract: A laser device provided with the function of predicting occurrence of condensation and preventing occurrence of condensation in advance. The laser device is provided with a controlling part calculating a reference temperature for judging whether a cooling water feed device may feed cooling water based on a temperature measured by a thermometer and a humidity measured by a hygrometer, and a comparing part comparing a reference temperature and a cooling water temperature. The cooling water feed device is configured to stop the feed of cooling water after a command for starting up the laser oscillator has been output and the cooling water temperature is lower than the reference temperature and to start or continue the feed of cooling water when the cooling water temperature is the reference temperature or more.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: October 29, 2019
    Assignee: FANUC CORPORATION
    Inventors: Akihiko Nishio, Yuji Nishikawa, Hiroyuki Yoshida, Hisatada Machida
  • Patent number: 10442374
    Abstract: According to one embodiment, a vehicle-use storage battery system includes a storage battery, a main circuit, a circuit breaker, a storage battery management unit, a first determiner, and a second determiner. The main circuit is electrically connected to the storage battery. The circuit breaker is disposed between the storage battery and the main circuit to make or break the electrical connection therebetween. The storage battery management unit manages an operating state of the storage battery. The first determiner determines whether to break the electrical connection between the storage battery and the main circuit by means of the circuit breaker. The second determiner determines, on the basis of at least one of operating states of the storage battery management unit, the first determiner, and the circuit breaker, whether to break the electrical connection between the storage battery and the main circuit by means of the circuit breaker.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: October 15, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Atsumi Kondo, Kazuto Kuroda, Tatsuya Arai, Masaki Sato, Akinobu Nishikawa, Shinichiro Kosugi, Masahiro Sekino, Hideaki Yasui, Mai Honda, Masahiro Kurosu, Kotaro Ogawa, Tomonao Takamatsu, Mitsunobu Yoshida, Takafumi Nakahama, Akihiko Ujiie
  • Patent number: 10358008
    Abstract: A suspension coil spring includes a lower end turn portion, an upper end turn portion, and a helical effective portion formed between the end turn portions. The lower end turn portion includes a first portion which contacts a lower spring seat irrespective of a load, and a second portion which contacts the lower spring seat or is separated from the same according to the load. The wire diameter of the second portion is greater than that of the first portion and an average wire diameter of the effective portion. The upper end turn portion includes a third portion which contacts an upper spring seat, and a fourth portion. The wire diameter of the fourth portion is greater that of the third portion and the average wire diameter of the effective portion.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: July 23, 2019
    Assignee: NHK SPRING CO., LTD.
    Inventors: Kenji Yamamotoya, Hideto Enomoto, Ken Takahashi, Toshiaki Sato, Mitsuhiro Sugiyama, Yoshio Kobayashi, Taichi Inage, Tomotake Kato, Akihiko Nishikawa, Masahiro Umezawa, Michihiko Ayada, Suguru Kajigaya
  • Patent number: 10340564
    Abstract: According to one embodiment, a vehicular storage battery device includes a housing, battery boxes, and a common cooling passage. The battery boxes are disposed in the housing. Each of the battery boxes houses an electric cell as a vehicle power source and includes a heat transporting part transporting heat generated in the battery box to outside of the battery box. The common cooling passage is disposed in the housing. The common cooling passage is provided with an inlet for taking in a fluid and an outlet for discharging the fluid having passed through the passage. The inlet and the outlet are open in a direction different from a traveling direction of the vehicle. The heat transporting part of each of the battery boxes is exposed to inside of the passage.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: July 2, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akinobu Nishikawa, Shigeki Kono, Masaki Sato, Tatsuya Arai, Kotaro Ogawa, Shinichiro Kosugi, Masahiro Sekino, Kazuto Kuroda, Hideaki Yasui, Mai Honda, Tomonao Takamatsu, Mitsunobu Yoshida, Takafumi Nakahama, Akihiko Ujiie, Atsumi Kondo, Masahiro Kurosu
  • Publication number: 20180229576
    Abstract: An annular reference surface is formed around a through-hole of an eye portion. A distal-end-side curved portion is formed at a first corner portion, on an outer side of the annular reference surface. The thickness of the distal-end-side curved portion is reduced in a range of a length from the first flat surface toward the distal end surface. A hole-side curved portion whose thickness is reduced toward an inner surface of the through-hole is formed at a second corner portion, on an inner side of the annular reference surface. The length of the hole-side curved portion is less than the length of the distal-end-side curved portion. The hole-side curved portion is curved with a greater curvature than that of the distal-end-side curved portion.
    Type: Application
    Filed: April 17, 2018
    Publication date: August 16, 2018
    Applicant: NHK SPRING CO., LTD.
    Inventors: Yasuharu SAKURAI, Yoshihiro KOSHITA, Akihiko NISHIKAWA, Akifumi OTANI
  • Publication number: 20180222267
    Abstract: A stabilizer includes a stabilizer main body, and eyes formed on both ends of the stabilizer main body. Through-holes are formed in fastening surfaces of the eyes, respectively. The stabilizer main body is covered with a main body coating film. The eye is covered with an eye coating film whose thickness is less than a thickness of the main body coating film. An inner surface of the through-hole is covered with an inner surface coating film. An incomplete coating portion is formed at a part of the inner surface of the through-hole in a circumferential direction. The incomplete coating portion is located on an extension of a straight line connecting a center of the through-hole and the center of gravity of the stabilizer main body in a side view of the stabilizer main body.
    Type: Application
    Filed: March 30, 2018
    Publication date: August 9, 2018
    Applicant: NHK SPRING CO., LTD.
    Inventors: Yasuharu SAKURAI, Yoshihiro KOSHITA, Akihiko NISHIKAWA, Akifumi OTANI
  • Patent number: 9713946
    Abstract: A strut-type suspension includes a compression coil spring, a lower spring seat, an upper spring seat, and a shock absorber. The compression coil spring is disposed at a position offset to the outer side of a vehicle with respect to the shock absorber. The compression coil spring is mounted in a vehicle body in such a state that it is compressed between spring seats. The compression coil spring includes a large-diameter wire portion and a small-diameter wire portion. The large-diameter wire portion is provided in a vehicle inner-side portion of the compression coil spring. The small-diameter wire portion is provided in a vehicle outer-side portion. A wire diameter of the large-diameter wire portion is greater than a wire diameter of the small-diameter wire portion.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: July 25, 2017
    Assignee: NHK SPRING CO., LTD.
    Inventors: Kenji Yamamotoya, Hideto Enomoto, Ken Takahashi, Toshiaki Sato, Mitsuhiro Sugiyama, Yoshio Kobayashi, Taichi Inage, Tomotake Kato, Akihiko Nishikawa, Masahiro Umezawa, Michihiko Ayada, Suguru Kajigaya
  • Patent number: 9463676
    Abstract: A knee-action-type suspension is provided with an arm member, a compression coil spring, and a shock absorber. The coil spring is extended and retracted between a full-rebound state and a full-bump state in accordance with the magnitude of a load applied to a vehicle body. A wire of the coil spring includes a large-diameter wire portion, a small-diameter wire portion, and a wire diameter varying portion. The large-diameter wire portion is provided in a first portion of the coil spring, which is on the side near to a pivot. The small-diameter wire portion is provided in a second portion of the coil spring, which is on the side far from the pivot. A wire diameter of the large-diameter wire portion is greater than a wire diameter of the small-diameter wire portion.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: October 11, 2016
    Assignee: NHK SPRING CO., LTD.
    Inventors: Kenji Yamamotoya, Hideto Enomoto, Ken Takahashi, Toshiaki Sato, Mitsuhiro Sugiyama, Yoshio Kobayashi, Taichi Inage, Tomotake Kato, Akihiko Nishikawa, Masahiro Umezawa, Michihiko Ayada, Suguru Kajigaya
  • Publication number: 20160046164
    Abstract: A suspension coil spring includes a lower end turn portion, an upper end turn portion, and a helical effective portion formed between the end turn portions. The lower end turn portion includes a first portion which contacts a lower spring seat irrespective of a load, and a second portion which contacts the lower spring seat or is separated from the same according to the load. The wire diameter of the second portion is greater than that of the first portion and an average wire diameter of the effective portion. The upper end turn portion includes a third portion which contacts an upper spring seat, and a fourth portion. The wire diameter of the fourth portion is greater that of the third portion and the average wire diameter of the effective portion.
    Type: Application
    Filed: October 27, 2015
    Publication date: February 18, 2016
    Applicant: NHK SPRING CO., LTD.
    Inventors: Kenji YAMAMOTOYA, Hideto ENOMOTO, Ken TAKAHASHI, Toshiaki SATO, Mitsuhiro SUGIYAMA, Yoshio KOBAYASHI, Taichi INAGE, Tomotake KATO, Akihiko NISHIKAWA, Masahiro UMEZAWA, Michihiko AYADA, Suguru KAJIGAYA
  • Publication number: 20150251514
    Abstract: A strut-type suspension includes a compression coil spring, a lower spring seat, an upper spring seat, and a shock absorber. The compression coil spring is disposed at a position offset to the outer side of a vehicle with respect to the shock absorber. The compression coil spring is mounted in a vehicle body in such a state that it is compressed between spring seats. The compression coil spring includes a large-diameter wire portion and a small-diameter wire portion. The large-diameter wire portion is provided in a vehicle inner-side portion of the compression coil spring. The small-diameter wire portion is provided in a vehicle outer-side portion. A wire diameter of the large-diameter wire portion is greater than a wire diameter of the small-diameter wire portion.
    Type: Application
    Filed: May 4, 2015
    Publication date: September 10, 2015
    Applicant: NHK SPRING CO., LTD.
    Inventors: Kenji YAMAMOTOYA, Hideto ENOMOTO, Ken TAKAHASHI, Toshiaki SATO, Mitsuhiro SUGIYAMA, Yoshio KOBAYASHI, Taichi INAGE, Tomotake KATO, Akihiko NISHIKAWA, Masahiro UMEZAWA, Michihiko AYADA, Suguru KAJIGAYA
  • Publication number: 20150231939
    Abstract: A knee-action-type suspension is provided with an arm member, a compression coil spring, and a shock absorber. The coil spring is extended and retracted between a full-rebound state and a full-bump state in accordance with the magnitude of a load applied to a vehicle body. A wire of the coil spring includes a large-diameter wire portion, a small-diameter wire portion, and a wire diameter varying portion. The large-diameter wire portion is provided in a first portion of the coil spring, which is on the side near to a pivot. The small-diameter wire portion is provided in a second portion of the coil spring, which is on the side far from the pivot. A wire diameter of the large-diameter wire portion is greater than a wire diameter of the small-diameter wire portion.
    Type: Application
    Filed: May 4, 2015
    Publication date: August 20, 2015
    Applicant: NHK SPRING CO., LTD.
    Inventors: Kenji YAMAMOTOYA, Hideto ENOMOTO, Ken TAKAHASHI, Toshiaki SATO, Mitsuhiro SUGIYAMA, Yoshio KOBAYASHI, Taichi INAGE, Tomotake KATO, Akihiko NISHIKAWA, Masahiro UMEZAWA, Michihiko AYADA, Suguru KAJIGAYA
  • Patent number: 4763922
    Abstract: A steel rod body is fixedly fitted, at its end, with a metallic coupling member manufactured independently of the rod body. A solid section having a free end is formed either at the end of the rod body or the coupling member, while a tube section having an opening at its end is provided on the corresponding end of either the rod body or the coupling member. Circumferential and axial grooves are formed on the outer peripheral surface of the solid section. At least the free end of the solid section is inserted into the opening of the tube section, and the tube section is crimped by means of dies. Thus, part of the metal material of the tube section creeps into indentations on the solid section so that the tube section and the solid section are firmly linked together for integration. A waterproof sealant is provided either on an inner surface of the tube section or on an outer surface of the solid section.
    Type: Grant
    Filed: February 27, 1987
    Date of Patent: August 16, 1988
    Assignee: NHK Spring Co., Ltd.
    Inventor: Akihiko Nishikawa