Patents Assigned to Sunstar Engineering Inc.
  • Patent number: 11920028
    Abstract: Disclosed is a curable composition comprising an elastomer (A), an epoxy resin (B) and a latent curing agent (C), wherein the latent curing agent (C) comprises a combination of two or more latent curing agents.
    Type: Grant
    Filed: May 23, 2022
    Date of Patent: March 5, 2024
    Assignee: Sunstar Engineering Inc.
    Inventors: Toshio Kobayashi, Takaaki Inoue
  • Patent number: 11859682
    Abstract: A brake disc includes an outer circumferential portion including a waveform portion having recessed portions and projecting portions repeatedly formed over an outer circumference, and for the outer circumferential portion to have substantially uniform heat capacity distribution in a circumferential direction and in a radial direction, the outer circumferential portion is formed such that a ratio of a difference in heat capacities among a plurality of circumferential sections in the outer circumferential portion, which are sectioned at an equal angle in the circumferential direction, relative to a heat capacity of each circumferential section is equal to or less than a first predetermined ratio. A ratio of a difference in heat capacities among radial sections in the outer circumferential portion, which are sectioned to have an equal length in the radial direction, relative to a heat capacity of each radial section is equal to or less than a second predetermined ratio.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: January 2, 2024
    Assignee: SUNSTAR ENGINEERING INC.
    Inventor: Satoshi Kubota
  • Publication number: 20230381366
    Abstract: A deodorization apparatus according to one aspect of the present invention includes: a first main wall 201; a second main wall 202; a first side wall 203; a second side wall 204; a first partition wall 205 with a gap with the second main wall; a second partition wall 206 with a gap with the first main wall; a photocatalyst unit 30 provided between the first main wall and the second main wall, and allowing air to pass therethrough in a direction from the second main wall to the first main wall; and a centrifugal blower 40 disposed opposite to the photocatalyst unit with respect to the second partition wall and spaced apart from the first main wall, the centrifugal blower 40 having a suction port that opens toward the first main wall and a discharge port that opens on a side facing away from the second partition wall.
    Type: Application
    Filed: May 24, 2023
    Publication date: November 30, 2023
    Applicant: Sunstar Engineering Inc.
    Inventors: Tomoharu USA, Katsuhiro YAMAGUCHI
  • Patent number: 11786628
    Abstract: An air purifier according to an aspect of the present disclosure includes: an air passage defined between a first inner wall surface and a second inner wall surface that are planar and face each other, having a flat passage cross section in which a distance between the first inner wall surface and the second inner wall surface is small, and meandering in a plane parallel to the first inner wall surface and the second inner wall surface; a catalyst member including a support having a flat mesh shape, and a photocatalyst supported on the support, the catalyst member being disposed parallel to the first inner wall surface and the second inner wall surface in the air passage; and a plurality of light sources dispersed on the second inner wall surface, and configured to irradiate the catalyst member with light that activates the photocatalyst.
    Type: Grant
    Filed: September 22, 2021
    Date of Patent: October 17, 2023
    Assignee: Sunstar Engineering Inc.
    Inventors: Tomoharu Usa, Katsuhiro Yamaguchi
  • Patent number: 11739239
    Abstract: The present invention relates to a thermally crosslinkable composition comprising an acid-modified polymer A having a melting point of 110 to 150° C. and a crystallization temperature of 50 to 90° C., an acid-modified polymer B having a melting point of 30 to 110° C. and a crystallization temperature of lower than 50° C., a tackifier resin, and a curing agent, wherein the thermally crosslinkable composition has a crystallization temperature of 30 to 70° C.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: August 29, 2023
    Assignee: Sunstar Engineering Inc.
    Inventor: Yanmei Zhang
  • Patent number: 11635120
    Abstract: A sintered friction material for brake having a high friction coefficient, with which reduction of the friction coefficient is prevented at high temperature and stable brake performance is maintained. It comprises: a metal matrix of Ni or Ni+Fe (small amount); a solid lubricant (a); and a friction adjusting material (b) including: metal or alloy particles (b1) having an average particle size of 50 ?m or more and containing at least one selected from W, Mo, Cr, and FeW; and inorganic particles (b2) containing at least one selected from oxides, nitrides, carbides, and intermetallic compounds. An average particle size db1 of b1 and an average particle size db2 of b2 satisfy db1<db2. Dispersing, in the metal matrix, b1 and b2 satisfying particular conditions as the friction adjusting material can produce a geometrical structure (particle structure with a high filling density) suitable for preventing plastic deformation of the sintered friction material.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: April 25, 2023
    Assignee: Sunstar Engineering Inc.
    Inventors: Hoshiaki Terao, Raita Wada, Tsuyoshi Nakatsuji, Yoshinori Shinagawa
  • Patent number: 11572493
    Abstract: The present invention provides a hot-melt adhesive having a sufficiently long usable time and exhibiting good strength and good heat resistance. The present invention relates to a hot-melt adhesive composition comprising a hydrocarbon cyclic polymer (A), an ?-olefin polymer (C), and a tackifying resin (D).
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: February 7, 2023
    Assignee: Sunstar Engineering Inc.
    Inventor: Atsushi Uno
  • Patent number: 11554407
    Abstract: In a brake-disc intermediate product, a corrugated portion is molded using an upper mold and a lower mold. The brake-disc intermediate product is set in a mold, the mold has a slope corresponding to the corrugated portion, and an angular portion formed along the outer circumferential edge of the corrugated portion is in contact with the slope in a state where the brake-disc intermediate product is set in the mold. The angular portion in contact with the slope is deformed by pressing the brake-disc intermediate product in a direction of the mold, to mold a chamfer portion. The slope is formed so that a chamfering angle formed with respect to an inner bottom surface of the mold is larger at a portion in contact with the concave portion than a chamfering angle at a portion in contact with the convex portion.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: January 17, 2023
    Assignee: SUNSTAR ENGINEERING INC.
    Inventors: Tadashi Takenaka, Satoshi Kubota
  • Patent number: 11491505
    Abstract: Provided is an application tool that allows reduction of an amount of waste by using no masking sheets, and can easily form a coated portion such as an antislip protrusion with reduced variation in a short time period. The application tool includes a support plate and a plurality of application bodies disposed at the support plate so as to protrude with height positions of the tips aligned with each other. A tip recess is disposed at the tip portion of each of the plurality of the application bodies as a holding recess for holding coating liquid.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: November 8, 2022
    Assignee: SUNSTAR ENGINEERING INC.
    Inventors: Kazuki Furuhashi, Hirokazu Okamoto
  • Patent number: 11359046
    Abstract: An object of the present invention is to provide a polyurethane composition, in which reduction in the strength of the foam is suppressed when the foam has been greatly deformed. The present invention relates to a polyurethane composition comprising a base resin and a curing agent, wherein the base resin comprises a compound (A-1) comprising a polyalkylene skeleton comprising neither an aromatic skeleton nor an alicyclic skeleton, and having two or more functional groups having an active hydrogen atom, a compound (A-2) comprising an aromatic skeleton and/or alicyclic skeleton, and having two or more functional groups having an active hydrogen atom, a blowing agent (B), and an amine-based catalyst (C); a polyurethane foam therefrom; and a method for soundproofing and reinforcing a vehicle.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: June 14, 2022
    Assignee: Sunstar Engineering Inc.
    Inventors: Kiichi Yamashita, Tatsuya Wakamori
  • Patent number: 11298665
    Abstract: An apparatus (1) for mixing a paste material with gas includes: a mixing part (2) that mixes the paste material with the gas using a piston pump (10); and a static mixer (3) that is connected to the mixing part to stir a mixture obtained by mixing the paste material with the gas in the mixing part. The static mixer includes one or a plurality of stirring sections through which the mixture passes, the stirring section has a shape that allows a flow of the mixture passing through the stirring section to be stirred. A ratio of a volume of the piston pump to a volume of at least one of the stirring sections of the static mixer is within a range from 1:0.2 to 1:5.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: April 12, 2022
    Assignee: SUNSTAR ENGINEERING INC.
    Inventors: Takuro Omachi, Hiroyuki Nagata
  • Patent number: 11261358
    Abstract: The present invention provides an epoxy resin-based curable composition which may be used as a structural adhesive for an automobile. Particularly, the present invention provides an epoxy resin-based curable composition having excellent low-temperature curability, while maintaining good storage stability and good adhesion. The present invention relates to a curable composition comprising an epoxy resin, a urea-based curing accelerator (A) and an amine-based curing agent (B) having a pyrazine ring.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: March 1, 2022
    Assignee: Sunstar Engineering Inc.
    Inventors: Kazunobu Takami, Takatomi Nishida
  • Publication number: 20210316327
    Abstract: Provided is an application tool that allows reduction of an amount of waste by using no masking sheets, and can easily form a coated portion such as an antislip protrusion with reduced variation in a short time period. The application tool includes a support plate and a plurality of application bodies disposed at the support plate so as to protrude with height positions of the tips aligned with each other. A tip recess is disposed at the tip portion of each of the plurality of the application bodies as a holding recess for holding coating liquid.
    Type: Application
    Filed: August 7, 2019
    Publication date: October 14, 2021
    Applicant: Sunstar Engineering Inc.
    Inventors: Kazuki FURUHASHI, Hirokazu OKAMOTO
  • Patent number: 11136460
    Abstract: An anti-slip structure comprising a plurality of anti-slip projections that protrude outwardly from a floor surface and are arranged so as to be mutually isolated, the anti-slip structure being such that the anti-slip projections are of circular dome-like three-dimensional shape and are cured bodies produced by curing a composition for anti-slip treatment comprising a curable resin. This anti-slip structure causes a floor surface comprising ceramic tile, tile made of stone material, or the like to be imparted with excellent anti-slip capability without impairing the lustrousness, beauty, design characteristics, or cleanability of the floor surface.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: October 5, 2021
    Assignee: SUNSTAR ENGINEERING INC.
    Inventors: Hirokazu Okamoto, Norihiro Tameno, Yoshimasu Tanaka
  • Patent number: 11135749
    Abstract: In order to provide a filling apparatus which is capable of advantageously delivering a foamable material having a necessary amount into a closed cross section of a vehicle body, in an embodiment of the present invention, there is provided a filling apparatus for filling a closed cross section of a vehicle body with a foamable material is provided, wherein the foamable material is a foamable two-liquid polyurethane material, wherein the filling apparatus comprises a delivering part for delivering the foamable material into the closed cross section of the vehicle body, and wherein the filling apparatus further comprises an input part into which a delivery command value and correction values to set a real delivery amount are input.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: October 5, 2021
    Assignee: SUNSTAR ENGINEERING INC.
    Inventors: Kiichi Yamashita, Hiroyuki Nagata
  • Patent number: D912798
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: March 9, 2021
    Assignee: SUNSTAR ENGINEERING INC.
    Inventor: Issei Oura
  • Patent number: D913473
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: March 16, 2021
    Assignee: SUNSTAR ENGINEERING INC.
    Inventor: Issei Oura
  • Patent number: D914190
    Type: Grant
    Filed: July 28, 2020
    Date of Patent: March 23, 2021
    Assignee: SUNSTAR ENGINEERING INC.
    Inventor: Issei Oura
  • Patent number: D935008
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: November 2, 2021
    Assignee: SUNSTAR ENGINEERING INC.
    Inventor: Issei Oura
  • Patent number: D966485
    Type: Grant
    Filed: July 28, 2020
    Date of Patent: October 11, 2022
    Assignee: SUNSTAR ENGINEERING INC.
    Inventor: Issei Oura