Non-backdriveable free wheeling coupling

192 clutches and power-stop control – Clutches – Automatic

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192 67R, F16D 1104

Patent

active

046357734

ABSTRACT:
A rotary coupling for connecting a driven part to a source of rotary force transmits rotary force in one direction only and disengages to permit the driven part to free wheel when the input member is stopped and precludes the backdriving of rotary force from output member to input member. The coupling includes an input member having a splined shaft, a coupling member connected to the splined shaft, and a co-axial output member. The coupling member and the output member having complementary sets of axially facing clutch teeth. Guides in the form of helical grooves on the coupling member and spring loaded followers acting with the guides affect the engagement and disengagement of the clutch teeth by moving the coupling member toward and away from output member, the followers and guides themselves disengaging to permit free wheeling of output member when input member is stopped.

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