The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 2006
Filed:
Apr. 11, 2001
Hendrikus Jan Kapaan, Nieuwegein, NL;
Eduardus Gerardus Maria Holweg, Delft, NL;
Aurelio Nervo, Turin, IT;
Hendrikus Jan Kapaan, Nieuwegein, NL;
Eduardus Gerardus Maria Holweg, Delft, NL;
Aurelio Nervo, Turin, IT;
SKF Engineering & Research Centre, BV, Nieuwegein, NL;
Abstract
An electric screw actuator system, e.g. for an electrically driven and controlled steering device, comprises a screw actuator, an electric motor () engaging the screw actuator through a reduction gear mechanism (), 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 () and an electromagnetic coupling (), 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.