Patents by Inventor Tastuyoshi Aisaka

Tastuyoshi Aisaka 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).

  • Low expansion cast iron
    Patent number: 5173253
    Abstract: A cast iron having an austenitic matrix and consisting essentially of from 1% up to 3.5% carbon, up to 1.5% silicon, from 32% to 39.5% nickel, from 1% to less than 4% cobalt, up to 41% of the combined total of nickel plus cobalt and the balance substantially all iron provides a low expansion coefficient, good castability, good cutting properties and good damping capacity.
    Type: Grant
    Filed: April 15, 1991
    Date of Patent: December 22, 1992
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takanobu Nishimura, Motoo Suzuki, Tastuyoshi Aisaka
  • Low expansion cast iron lapping tool
    Patent number: 5030299
    Abstract: A lapping tool with a flatness in the range below 20 .mu.m which is made of at least cast iron having an austenitic matrix and consisting essentially of from 1% up to 3.5% carbon, up to 1.5% silicon, from 32% to 39.5% nickel, from 1% to less than 4% cobalt, up to 41% of the combined total of nickel plus cobalt and the balance substantially all iron providing a low expansion coefficient, good castability, good cutting properties and good damping capacity. (By % is meant % by weight).
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: July 9, 1991
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takanobu Nishimura, Motoo Suzuki, Tastuyoshi Aisaka