Electric screw actuator system

Details Electric screw actuator system Electric screw actuator system

2006-05-30

2006-05-30

Ho, Ha (Department: 3681)

Planetary gear transmission systems or components

Input from independent power sources

Including manual input

C475S003000, C188S158000

Reexamination Certificate

active

07052427

ABSTRACT:
An electric screw actuator system, e.g. for an electrically driven and controlled steering device, comprises a screw actuator, an electric motor (2) engaging the screw actuator through a reduction gear mechanism (3), electronic operating means for operating the screw actuator electrically, and a mechanical back-up system for operating the screw actuator in the absence of electric power e.g. in the case of an electric power failure of in the case the electric power is switched off, maintenance, garage parking etc. The mechanical back-up system comprises a manually controllable operation member (4) and an electromagnetic coupling (6), said coupling disengaging the rotation member from the screw actuator in the case of nominal operation and availability of electric power, and engaging the rotation member with the screw actuator in the case of electric power failure.

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