Patents by Inventor Hiromu Minamitani

Hiromu Minamitani 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).

  • Fluid composition for use in viscous coupling
    Patent number: 4959166
    Abstract: A fluid composition for use in a viscous coupling is provided, which comprises (A) a base oil made of a polyorganosiloxane fluid having a viscosity of from about 500 to about 500,000 centistokes at 25.degree. C., and (B) at least one component selected from the group consisting of sulfur and sulfur compounds (b) to (g) listed below being added in a minor amount to said base oil;(b) a hydrocarbon sulfide;(c) a sulfurized oil or fat which is the reaction product of an oil or fat and sulfur;(d) a zinc dithiophosphate;(e) a dialkyldithiocarbamic acid metal salt;(f) elemental sulfur; and(g) a cyclic hydrocarbon sulfide.This fluid composition can be stably used in a viscous coupling for an extended period.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: September 25, 1990
    Assignees: Cosmo Oil Co., Ltd., Dow Corning Kabushiki Kaisha, Tochigifujisangyo Kabushiki Kaisha
    Inventors: Hiromu Minamitani, Norio Yano, Atsushi Ikezawa, Toshio Kanayama, Takashi Ushijima, Masao Teraoka, Osamu Ishikawa