| 摘要 |
A resiliently deformable elastomeric ring seats in a non-rotary manner in a continuous inner circumferential channel of a nut of a ball screw actuator to cooperate with the screw of the actuator as a wiper and sealing means. The channel is wider than the ring to permit slight axial shift of the ring and the ring has at least one continuous narrow outer circumferential sealing rib in contact with the bottom of the channel that yields sufficiently under radial compression to compensate for the range of clearances afforded by the given tolerances of the nut and screw to insure that the body of the ring will not be radially compressed to a destructive degree.
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