Patents Assigned to Chuohhatsujo Kogyo Co., Ltd.
  • Method for manufacturing spring assemblies
    Patent number: 4756070
    Abstract: A method for manufacturing spring assemblies, in which a spring is fixed to a hole formed in a linear or an annular metal plate by compressing side edges of the plate to collapse the hole after inserting an end of the spring therethrough. The process is simple, and the obtained spring assemblies have excellent durability because there are not any projecting parts for installing springs on the metal plate, which are otherwise a factor in fatigue failure.
    Type: Grant
    Filed: July 29, 1986
    Date of Patent: July 12, 1988
    Assignee: Chuohhatsujo Kogyo Co., Ltd.
    Inventor: Kazuaki Takeuchi
  • Method for manufacturing spring assemblies
    Patent number: 4756071
    Abstract: A method for manufacturing spring assemblies, in which a spring is fixed to a hole formed in a linear or an annular metal plate by compressing side edges of the plate to collapse the hole after inserting an end of the spring therethrough. The process is simple, and the obtained spring assemblies have excellent durability because there are not any projecting parts for installing springs on the metal plate, which are otherwise a factor in fatigue failure.
    Type: Grant
    Filed: July 29, 1986
    Date of Patent: July 12, 1988
    Assignee: Chuohhatsujo Kogyo Co., Ltd.
    Inventor: Kazuaki Takeuchi