Patents by Inventor Kiyomi Arimatsu

Kiyomi Arimatsu 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: 5558803
    Abstract: An electrorheological fluid comprising dielectric particles and an insulating liquid and characterized by exhibiting a viscosity of not more than 0.2 Pa.cndot.s at a shear rate of 33/s when measured at 25.degree. C. in the absence of supply of an electric field and a structural viscosity satisfying the condition of the formula (1):0.01 Pa.cndot.s.ltoreq..eta..sub.1 -.eta..sub.2 .ltoreq.0.5 Pa.cndot.s (1)wherein .eta..sub.1 is a viscosity in at a shear rate of 3.3/s when measured at 25.degree. C. in the absence of supply of an electric field and .eta..sub.2 is a viscosity in at a shear rate of 33/s when measured at 25.degree. C. in the absence of supply of an electric field. This electrorheological fluid generates a large shear stress, exhibits an excellent current property and an excellent durability, and excels particularly in dispersion stability, redispersibility and fluidity.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: September 24, 1996
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Izuho Okada, Yoshinobu Asako, Kiyomi Arimatsu, Minoru Kobayashi, Satoru Ono, Ryuji Aizawa
  • Patent number: 5376294
    Abstract: An electrorheological fluid comprising a dielectric particle as the dispersed phase, an insulating oil as the dispersing medium, and an additive, the additive being substantially insoluble in the dispersing medium, and being a composite containing a polysiloxane-containing structural unit (A), and at least one dispersed phase absorbing chain-containing structural unit (B) selected from the group consisting of an alkylene oxide chain-containing structural unit (B-1), a nitrogen atom chain-containing structural unit (B-2), and a long hydrocarbon chain-containing structural unit (B-3).
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: December 27, 1994
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Izuho Okada, Yoshinobu Asako, Kiyomi Arimatsu, Minoru Kobayashi, Satoru Ono, Ryuji Aizawa
  • Patent number: RE35773
    Abstract: An electroreheological field comprising a dielectric particle as the dispersed phase, an insulating oil as the dispersing medium, and an additive, the additive being substantially insoluble in the dipersing medium, and being a composite containing a polysiloxane-containing structural unit (A), and at least one dispersed phase absorbing chain-containing structural unit (B) selected from the group consisting of an alkylene oxide chain-containing structural unit (B-1), a nitrogen atom chain-containing structural unit (B-2), and a long hydrocarbon chain-containing structural unit (B-3).
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: April 21, 1998
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Izuho Okada, Yoshinobu Asako, Kiyomi Arimatsu, Minoru Kobayashi, Satoru Ono, Ryuji Aizawa