Patents Assigned to Hakko Kouyu Co., Ltd.
  • Traction type elevator system
    Patent number: 4501115
    Abstract: A wire rope for use in a traction type elevator system is coated with a soft-solid agent or a greasy agent having a drip temperature higher than 55.degree. C. and exhibiting physical properties such that it is evaporated in an amount less than 1 weight percent at 105.degree. C. for an interval of eight hours and elevates the coefficient of friction or traction between the wire rope and the drive sheave when coated on the wire rope.
    Type: Grant
    Filed: April 6, 1983
    Date of Patent: February 26, 1985
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Tokyo Rope Mfg., Co., Ltd., Hakko Kouyu Co., Ltd.
    Inventors: Katsuhiko Suzuki, Seihachi Naganuma