Rotary Machines Patents (Class 140/4)
  • Patent number: 7117703
    Abstract: A wire-stranded hollow coil body (1) has a multitude of coil line elements (2) stranded along a predetermined circular line to form a flexible wire tube having a central axial hollow portion (3), the flexible wire tube is stranded under a strand-turn resistant load and heat treated to remove a residual stress upon formation so as to provide a high rotation-following capability and a high straightness. Further, a method provides a way to strand the coil line elements (2) under a strand-turn resistant load while heat treating the coil line elements (2).
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: October 10, 2006
    Assignee: Asahi Intecc Co., Ltd.
    Inventors: Tomihisa Kato, Kenji Miyata