Patents by Inventor Tomoyuki Fujita

Tomoyuki Fujita 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).

  • Publication number: 20220041549
    Abstract: To provide a method for producing a perfluoroacyl peroxide which can suppress formation of solid matters in a reaction apparatus, and a method for producing a fluoroalkyl iodide. The method for producing a perfluoroacyl peroxide of the present invention is a method for producing a perfluoroacyl peroxide, which comprises: mixing an organic solvent solution containing a perfluoroacyl halide and an organic solvent which is at least one perfluoroalkyl iodide selected from the group consisting of C2F5I, C4F9I and C6F13I, a first aqueous solution containing hydrogen peroxide, and a second aqueous solution containing a basic alkali metal compound, to obtain a mixed liquid, and reacting the perfluoroacyl halide and the hydrogen peroxide in the mixed liquid to produce a perfluoroacyl peroxide, wherein the pH of the aqueous phase of the mixed liquid is adjusted to be from 7 to 14.
    Type: Application
    Filed: October 26, 2021
    Publication date: February 10, 2022
    Applicant: AGC Inc.
    Inventors: Tomoyuki FUJITA, Shintaro FUKUNAGA
  • Publication number: 20210348620
    Abstract: An electric pump provided with a pump unit configured to discharge working oil by being rotationally driven by an electric motor includes: a drive shaft configured to transmit rotational driving force from the electric motor to a rotor of the pump unit; a rotation-detection shaft provided coaxially with the drive shaft, the rotation-detection shaft being configured to be rotated together with the rotor; and a rotation detector unit configured to detect rotation of the rotation-detection shaft. The rotation-detection shaft has: an engagement portion configured to engage with the rotor; and a detection-target portion facing the rotation detector unit, and an outer diameter of the detection-target portion is set so as to be larger than an outer diameter of the engagement portion.
    Type: Application
    Filed: October 29, 2019
    Publication date: November 11, 2021
    Applicants: KYB Corporation, NIDEC TOSOK CORPORATION
    Inventors: Kohei KUBO, Tomoyuki FUJITA, Koichiro AKATSUKA, Yoshiyuki MAKI, Koji HIGUCHI, Yutaka HASHIMOTO
  • Patent number: 11061189
    Abstract: There is provided an optical fiber protection structure capable of mitigating deterioration of optical characteristics of an optical fiber under a high-temperature environment and a method of manufacturing an optical element using the same. An optical combiner structure protects bare fiber exposure portions in which bare fibers are exposed from the coverings of optical fibers. The optical combiner structure has a fiber accommodation portion having a fiber accommodation groove that accommodates the bare fiber exposure portions therein, fixation resins filled within the fiber accommodation groove for fixing a portion of the coverings within the fiber accommodation groove, and seal resins for sealing spaces between the bare fibers and the coverings on ends of the bare fiber exposure portions. The seal resins are formed so as to be spaced from an inner surface of the fiber accommodation groove.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: July 13, 2021
    Assignee: FUJIKURA LTD.
    Inventors: Hiroto Nakazato, Tomoyuki Fujita, Kazuya Ishida
  • Patent number: 10942311
    Abstract: Provided is an optical device which can control a beam quality of outgoing light. An optical device (10) includes an entrance fiber bundle (12), an exit fiber (13), and a reduced diameter part (11). The reduced diameter part (11) has (i) an entrance end surface (11a) and (ii) an exit end surface (11b) which is narrower in area than the entrance end surface (11a). In a case where the entrance end surface (11a) is viewed from a normal direction of the entrance end surface (11a), a center (C2) of the exit end surface (11b) deviates from a center (C1) of the entrance end surface (11a).
    Type: Grant
    Filed: March 9, 2020
    Date of Patent: March 9, 2021
    Assignee: FUJIKURA LTD.
    Inventor: Tomoyuki Fujita
  • Publication number: 20200292761
    Abstract: There is provided an optical fiber protection structure capable of mitigating deterioration of optical characteristics of an optical fiber under a high-temperature environment and a method of manufacturing an optical element using the same. An optical combiner structure protects bare fiber exposure portions in which bare fibers are exposed from the coverings of optical fibers. The optical combiner structure has a fiber accommodation portion having a fiber accommodation groove that accommodates the bare fiber exposure portions therein, fixation resins filled within the fiber accommodation groove for fixing a portion of the coverings within the fiber accommodation groove, and seal resins for sealing spaces between the bare fibers and the coverings on ends of the bare fiber exposure portions. The seal resins are formed so as to be spaced from an inner surface of the fiber accommodation groove.
    Type: Application
    Filed: February 21, 2017
    Publication date: September 17, 2020
    Applicant: FUJIKURA LTD.
    Inventors: Hiroto Nakazato, Tomoyuki Fujita, Kazuya Ishida
  • Publication number: 20200209478
    Abstract: Provided is an optical device which can control a beam quality of outgoing light. An optical device (10) includes an entrance fiber bundle (12), an exit fiber (13), and a reduced diameter part (11). The reduced diameter part (11) has (i) an entrance end surface (11a) and (ii) an exit end surface (11b) which is narrower in area than the entrance end surface (11a). In a case where the entrance end surface (11a) is viewed from a normal direction of the entrance end surface (11a), a center (C2) of the exit end surface (11b) deviates from a center (C1) of the entrance end surface (11a).
    Type: Application
    Filed: March 9, 2020
    Publication date: July 2, 2020
    Applicant: Fujikura Ltd.
    Inventor: Tomoyuki Fujita
  • Patent number: 10690872
    Abstract: An optical fiber protection structure has a fiber accommodation portion having a fiber accommodation groove formed therein for accommodating at least a portion of optical fibers and first resins filled in the fiber accommodation groove. The first resins are to fix a portion of the optical fibers within the fiber accommodation groove. The optical fiber protection structure has a cover member disposed above the fiber accommodation portion so as to cover the fiber accommodation groove, second resins for allowing the first resins to expand toward the cover member to reduce a stress applied to the optical fibers, and a third resin for fixing the cover member onto the fiber accommodation portion. The second resins have a Young's modulus lower than those of the first resins.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: June 23, 2020
    Assignee: FUJIKURA LTD.
    Inventors: Tomoyuki Fujita, Hiroto Nakazato, Takanori Yamauchi
  • Patent number: 10675194
    Abstract: An absorbent article has a planar direction and a thickness direction. The absorbent article includes a volatile first functional component, a volatile second functional component, water-disintegrable microcapsules that contain the second functional component, and a solvent that keeps the second functional component contained inside the microcapsules. Between a liquid-permeable layer and an absorption layer, the absorbent article has functional composition coated regions that extend in the planar direction and that are coated with the functional composition, and has adhesive coated regions that extend in the planar direction and that are coated with an adhesive. The adhesive coated regions have an adhesive region that directly or indirectly joins the liquid-permeable payer and the absorption layer.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: June 9, 2020
    Assignee: UNICHARM CORPORATION
    Inventors: Jun Kudo, Toshiyuki Tanio, Yuji Takahashi, Asami Shima, Tomoyuki Fujita
  • Patent number: 10627573
    Abstract: Provided is an optical device which can control a beam quality of outgoing light. An optical device (10) includes an entrance fiber bundle (12), an exit fiber (13), and a reduced diameter part (11). The reduced diameter part (11) has (i) an entrance end surface (11a) and (ii) an exit end surface (11b) which is narrower in area than the entrance end surface (11a). In a case where the entrance end surface (11a) is viewed from a normal direction of the entrance end surface (11a), a center (C2) of the exit end surface (11b) deviates from a center (C1) of the entrance end surface (11a).
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: April 21, 2020
    Assignee: FUJIKURA LTD.
    Inventor: Tomoyuki Fujita
  • Publication number: 20190146157
    Abstract: Provided is an optical device which can control a beam quality of outgoing light. An optical device (10) includes an entrance fiber bundle (12), an exit fiber (13), and a reduced diameter part (11). The reduced diameter part (11) has (i) an entrance end surface (11a) and (ii) an exit end surface (11b) which is narrower in area than the entrance end surface (11a). In a case where the entrance end surface (11a) is viewed from a normal direction of the entrance end surface (11a), a center (C2) of the exit end surface (11b) deviates from a center (C1) of the entrance end surface (11a).
    Type: Application
    Filed: March 6, 2017
    Publication date: May 16, 2019
    Applicant: FUJIKURA LTD.
    Inventor: Tomoyuki Fujita
  • Publication number: 20190113702
    Abstract: An optical fiber protection structure has a fiber accommodation portion having a fiber accommodation groove formed therein for accommodating at least a portion of optical fibers and first resins filled in the fiber accommodation groove. The first resins are to fix a portion of the optical fibers within the fiber accommodation groove. The optical fiber protection structure has a cover member disposed above the fiber accommodation portion so as to cover the fiber accommodation groove, second resins for allowing the first resins to expand toward the cover member to reduce a stress applied to the optical fibers, and a third resin for fixing the cover member onto the fiber accommodation portion. The second resins have a Young's modulus lower than those of the first resins.
    Type: Application
    Filed: April 6, 2017
    Publication date: April 18, 2019
    Applicant: FUJIKURA LTD.
    Inventors: Tomoyuki Fujita, Hiroto Nakazato, Takanori Yamauchi
  • Publication number: 20180306182
    Abstract: A vane pump includes a rotor; a plurality of slits that are formed in the rotor, the plurality of vanes being respectively inserted into the plurality of slits in a slidable manner; a cam ring that has a cam face on which tip-ends of the vanes slide by the rotation of the rotor; and pump chambers that are defined by the rotor, the cam ring, and an adjacent pair of the vanes. The plurality of vanes have a plurality of first vanes that are formed by applying a DLC coating on a base material and second vanes that are formed such that the base material is exposed, the first vanes being respectively inserted into at least two adjacent slits of the plurality of slits.
    Type: Application
    Filed: September 2, 2016
    Publication date: October 25, 2018
    Applicant: KYB Corporation
    Inventors: Yoshiyuki MAKI, Tomoyuki FUJITA, Tomoyuki NAKAGAWA, Masamichi SUGIHARA
  • Publication number: 20180258931
    Abstract: A vane pump includes a pump cartridge that is accommodated in an accommodating space defined by the concave portion and the pump cover. The pump cartridge includes a first side plate that is provided between the bottom portion of the concave portion in the pump body and a cam ring; first pins that are provided so as to extend from the cam ring to the first side plate; and second pins that are provided so as to extend from the first side plate to the pump body.
    Type: Application
    Filed: August 29, 2016
    Publication date: September 13, 2018
    Applicant: KYB Corporation
    Inventors: Koichiro AKATSUKA, Tomoyuki FUJITA, Hiroki GOMI, Shota SHINDO
  • Patent number: 10073220
    Abstract: Provided is an optical coupler configured to cause an NA of light, which exits a taper fiber, to be smaller as compared with a conventional optical coupler. A taper fiber has a high refractive index part which is provided inside a core of the taper fiber and which has a refractive index smaller than a refractive index ncore of the core. An exit end surface of each GI fiber is bonded to an entrance end surface of the taper fiber so that at least a part of the exit end surface of the each GI fiber overlaps with a section of the high refractive index part. A relative refractive index difference of the taper fiber is smaller than 0.076%.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: September 11, 2018
    Assignee: FUJIKURA LTD.
    Inventors: Tomoyuki Fujita, Kentaro Ichii, Ken Katagiri, Kenichi Ohmori, Rintaro Kitahara, Tatsuya Kishi
  • Publication number: 20180252215
    Abstract: A vane pump includes a high-pressure chamber formed as a groove in a bottom portion of a pump-accommodating concave portion. The working fluid is discharged from a plurality of discharge ports leading to the high-pressure chamber. A high-pressure passage has an opening portion opening to the high-pressure chamber and guides the working fluid to the outside of the high-pressure chamber. In the vane pump, one of the plurality of discharge ports is arranged so as to face the opening portion of the high-pressure passage, and the flow-passage cross-sectional area of the high-pressure chamber is smaller than the total flow-passage cross-sectional area of the plurality of the discharge ports.
    Type: Application
    Filed: August 31, 2016
    Publication date: September 6, 2018
    Applicant: KYB Corporation
    Inventors: Hiromi SHIMONO, Tomoyuki FUJITA, Tomoyuki NAKAGAWA, Hirotoshi KONDOU
  • Patent number: 9995301
    Abstract: A vane pump includes a rotor; a plurality of vanes; a cam ring; and a pump body having an accommodating concave portion accommodating the cam ring. The cam ring includes a ring fitting portions formed in a plurality of regions on an outer circumference and a ring small-diameter portions formed on the outer circumference so as to have an outer diameter smaller than those of the ring fitting portions. The accommodating concave portion has a body fitting portion to which the ring fitting portions is fitted and a body large-diameter portions formed on the inner circumference in a plurality of regions so as to have an inner diameter lager than that of the body fitting portions.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: June 12, 2018
    Assignee: KYB Corporation
    Inventors: Masamichi Sugihara, Tomoyuki Fujita, Tomoyuki Nakagawa, Tsutomu Komiya
  • Publication number: 20180149153
    Abstract: A pump device includes: a main pump and a sub pump; and a switching valve that switches so as to supply the hydraulic oil discharged from the sub pump to the hydraulic device, or to return the hydraulic oil discharged from the sub pump to the suction side. The main pump and the sub pump each include: a rotor, a discharge port into which the hydraulic oil discharged from a pump chamber is led, and a groove-shaped discharge-side notch formed from an opening edge of the discharge port toward a direction opposite to a rotation direction of the rotor. The switching valve switches according to a rotation speed of the drive shaft. At least one discharge-side notch of the sub pump is formed so that a resistance applied to the flow of the hydraulic oil passing therethrough is greater than that of the discharge-side notch of the main pump.
    Type: Application
    Filed: June 1, 2016
    Publication date: May 31, 2018
    Applicant: KYB Corporation
    Inventors: Koichiro AKATSUKA, Tomoyuki FUJITA, Tomoyuki NAKAGAWA, Fumiyasu KATOU, Hiroki GOMI
  • Publication number: 20180112661
    Abstract: A variable displacement vane pump includes: a control orifice that imparts resistance to a flow of working oil discharged from pump chambers; a flow-amount control valve that operates in accordance with an upstream-downstream differential pressure of the control orifice and controls a flow amount of the working oil discharged from the pump chambers; a variable control valve that is operated by the working oil that has passed through the control orifice and controls an amount of eccentricity of a cam ring with respect to a rotor by controlling a pressure difference between a first fluid pressure chamber and a second fluid pressure chamber; and a return passage that is connected to the flow-amount control valve and circulates a part of the working oil discharged from the pump chambers through a suction passage.
    Type: Application
    Filed: April 19, 2016
    Publication date: April 26, 2018
    Applicant: KYB Corporation
    Inventors: Koichiro AKATSUKA, Tomoyuki FUJITA, Tomoyuki NAKAGAWA, Fumiyasu KATOU, Hiroki GOMI
  • Patent number: 9897086
    Abstract: A vane pump used as a fluid pressure source includes: a rotor that is rotationally driven; a plurality of vanes that are inserted into the rotor in a freely slidable manner; a cam ring at which tip-end portions of the vanes slides as the rotor rotates; a pump chamber that is defined between the adjacent vanes; a suction port that guides working fluid to the pump chamber; a discharge port through which the working fluid discharged from the pump chamber is guided; a groove-like notch that extends from an opening edge of the discharge port in an opposite direction from rotation direction of the rotor, and the notch has a gradient-changing portion at which a rate of change of opening area is decreased in the rotation direction of the rotor.
    Type: Grant
    Filed: January 19, 2015
    Date of Patent: February 20, 2018
    Assignee: KYB Corporation
    Inventors: Tomoyuki Fujita, Koichiro Akatsuka, Fumiyasu Kato, Hiroki Gomi
  • Patent number: 9879670
    Abstract: A vane pump includes a rotor, vanes, pump chambers, a suction port, and a discharge port. The side member has a first transition section and a second transition section. The first transition section is a section from an end point of the suction port to a start point of the discharge port. The second transition section is a section from an end point of the discharge port to a start point of the suction port. An angle between the start point and the end point of the suction port is set such that a pressurizing timing is offset from a depressurizing timing. The pressurizing timing is a timing at which one pump chamber starts to communicate with the discharge port from the first transition section, and the depressurizing timing is a timing at which another pump chamber starts to communicate with the suction port from the second transition section.
    Type: Grant
    Filed: February 5, 2014
    Date of Patent: January 30, 2018
    Assignee: KYB Corporation
    Inventors: Koichiro Akatsuka, Tomoyuki Fujita, Fumiyasu Kato