| 摘要 |
A poush-putl actuator cable in which flexible multistrand metal sheath and core members (10 and 14) are maintained in substantially coaxial relationship in variously flexed positions and are guided for relative longitudinal movement by roller bearing means including a number of elongated roller bearing elements (18) maintained oriented transversely to the length of the cable and in successively spaced relationship along the length of the cable and that no two bearing elements (18) are diametrically opposed. Thus spaced, and with opposite end portions (18a) having roller surfaces contoured to roll on the sheath interior and an intermediate portion (18b) contoured to roll on the core member (14), the roller bearing elements (18) can be given zero or negative clearance between cable members (10 and 14) so as to provide an actuator with negligible backlash, low frictional restraint and high load bearing capability throughout a wide range of flexure. |
