Patents Assigned to Nippo Sangyo Co. Ltd.
  • Friction coefficient measurement apparatus
    Patent number: 10545086
    Abstract: An object of the present invention is to provide a friction coefficient measurement apparatus which measures an angle of relative torsion caused by a friction between a road surface friction measuring rubber attached strip and a road surface and the friction coefficient measurement apparatus which is able to reduce operator taken for work of replacing the road surface friction measuring rubber attached strip with new one.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: January 28, 2020
    Assignee: NIPPO SANGYO CO., LTD.
    Inventors: Hironari Abe, Kosuke Abe, Noboru Ishikawa
  • FRICTION COEFFICIENT MEASUREMENT APPARATUS
    Publication number: 20180202917
    Abstract: An object of the present invention is to provide a friction coefficient measurement apparatus which measures an angle of relative torsion caused by a friction between a road surface friction measuring rubber attached strip and a road surface and the friction coefficient measurement apparatus which is able to reduce operator taken for work of replacing the road surface friction measuring rubber attached strip with new one.
    Type: Application
    Filed: November 2, 2017
    Publication date: July 19, 2018
    Applicant: NIPPO SANGYO CO., LTD.
    Inventors: Hironari ABE, Kosuke ABE, Noboru ISHIKAWA
  • Road surface roughness measuring device
    Patent number: 6679106
    Abstract: The object of the present invention is to provide a road surface roughness measuring apparatus for measuring the coefficient of dynamic friction and the roughness of the road surface in each direction at a same section where the coefficient of dynamic friction is measured, said apparatus divides the measuring circle on the road surface into a plurality of sections, on which measuring circle the rotary type unit for measuring the coefficient of dynamic friction measures the coefficient of dynamic friction.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: January 20, 2004
    Assignee: Nippo Sangyo Co., Ltd.
    Inventors: Hironari Abe, Toshio Sawa, Atsushi Kasahara
  • Dynamic friction coefficient measuring apparatus
    Patent number: 4594878
    Abstract: A dynamic friction coefficient measuring apparatus includes a friction measuring portion having a disc with a friction measuring rubber member attached thereto, a driving disc adapted to rotate coaxially with the disc and a dynamometer which interconnects the disc and the driving disc. A tachometer measures the speed of the rubber member during rotation of the friction measuring portion. An X-Y recorder records two electric outputs of the friction measuring portion and the tachometer onto rectangular coordinates.
    Type: Grant
    Filed: June 19, 1984
    Date of Patent: June 17, 1986
    Assignee: Nippo Sangyo Co. Ltd.
    Inventors: Yuya Abe, Toshio Sawa