Patents Assigned to CKD Controls Limited
  • Smallsize motor with reduction gear and clutch mechanism
    Patent number: 4535261
    Abstract: This invention employs the structure that the clutch mechanism is provided between the rotating shaft (4) of a smallsize motor itself and the reduction mechanism (21) and said clutch mechanism is coupled or decoupled by a magnetic force generated by the excitation coil (2) of the motor and the spring means (19) giving a force in the direction opposing to said magnetic force.
    Type: Grant
    Filed: February 3, 1983
    Date of Patent: August 13, 1985
    Assignee: CKD Controls Limited
    Inventors: Kou Tsukamoto, Masatoshi Hirate
  • Gas flow rate control system
    Patent number: 4434933
    Abstract: A gas flow rate control system designed to control the gas flow rate by continuously controlling the opening of an electromagnetic valve, wherein the magnetic hysteresis of a plunger and a yoke which are magnetic material forming the magnetic circuit is removed by alternately passing current pulses through two energizing coils, so as to continuously reverse the direction of magnetization of the magnetic circuit and wherein the static friction between the plunger and the yoke is removed by oscillating the plunger.
    Type: Grant
    Filed: November 2, 1981
    Date of Patent: March 6, 1984
    Assignee: CKD Controls Limited
    Inventor: Akira Tamura