Patents by Inventor Isaburo Igarashi

Isaburo Igarashi 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).

  • Control apparatus for mortar compounding apparatus
    Patent number: 4091462
    Abstract: In a mortar compounding apparatus wherein water, cement, aggregate and sand are admitted into a mixing tank at a predetermined ratio and admixed to form mortar, there is provided a control apparatus including detection blades rotated by a constant torque motor via a spring in the mixing tank or a detection tank connected thereto. The load imposed on the detection blades by the mortar is detected by a potentiometer for controlling the amount of water or solid constituents admitted into the mixing tank.
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: May 23, 1978
    Assignees: Toto Electric Industry Co., Japanese National Railway
    Inventors: Isaburo Igarashi, Kazuriki Iizuka, Hiroshi Otsuka