Joints: Rotatable, Coaxial Patents (Class 174/21JC)
  • Dual concentric, electrically isolated, multi-function rotatable flexible shaft
    Patent number: 4475820
    Abstract: Flexible shafting has an outer flexible shaft with a hollow central bore for receiving an electrically insulating flexible tube which, in turn, receives an inner flexible shaft therein. The outer and inner flexible shafts are capable of rotating independently of each other while simultaneously transmitting an electric current.
    Type: Grant
    Filed: October 22, 1982
    Date of Patent: October 9, 1984
    Assignee: Pennwalt Corporation
    Inventor: Gerard M. Mulligan