Electric screw actuator system
US7052427B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2001 |
| Grant date | May 30, 2006 |
| Priority date | — |
| Expiry date | Jun 24, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/0448
- WIPO fieldTransport
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.