Patents Assigned to Kabushiki Kaisha Taiheiseisakusho
  • Method and an apparatus for producing a coiled spring
    Patent number: 4084420
    Abstract: The invention provides a method and an apparatus for automatic production of coiled springs, wherein the spring has close windings at both ends and rough windings with relatively large pitch in the middle portion, by shifting the supplying positions of a material wire in relation to a rotating fixed coil-supporter at varied speed in accordance with a desired winding pitch.
    Type: Grant
    Filed: October 8, 1976
    Date of Patent: April 18, 1978
    Assignee: Kabushiki Kaisha Taiheiseisakusho
    Inventor: Takeyoshi Tsutsumino