Patents Assigned to Chubu Rashiseisakusho Co., Ltd.
  • Patent number: 5076089
    Abstract: A method of manufacturing a hemisphere shoe provided between a piston and a slant plate of a swash plate compressor, said method comprises the steps of: cutting a cylindrical blank corresponding to a weight of the hemisphere shoe; plastic-working the cylindrical blank into a blank to be cold-forged having a large diameter plane portion at one end and a small diameter plane portion at another end and a body portion having a curved surface and a higher height than the finished hemisphere shoe and a smaller maximum diameter than the finished hemisphere shoe in a middle portion of the blank; positioning the blank so that the small diameter plane portion contacts with a recess die sufrace of a first die and the large diameter plane portion contacts with a substantially plane die surface of a second die; cold-forging the blank to be cold-forged by pressing the both dies till the dies are in a close contact with each other by means of a cold-forging press including the first die haivng a hemisphere recess die of a s
    Type: Grant
    Filed: March 13, 1990
    Date of Patent: December 31, 1991
    Assignee: Chubu Rashiseisakusho Co., Ltd.
    Inventor: Yasuhiko Takami