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:
Sep. 30, 2003
Filed:
Mar. 09, 2001
Jean Thierry Audren, Saint Rémy les Chevreuses, FR;
Daniel Bezanere, Antony, FR;
Sagem S.A., Paris, FR;
Abstract
A vibration motor comprising at least one stationary part and one part driven to move relative to the fixed part, together with excitation that is suitable for exerting forces that tend to move rigid contact sectors presented by the fixed part and/or the moving part and to cause the rigid sectors to vibrate in vibration modes that combine tangential vibration and normal vibration, thereby driving the movement of the moving part, the motor presenting for the tangential vibration or the normal vibration a main resonant mode and at least one secondary resonant mode, wherein the secondary resonant mode is at a frequency that is substantially equal to a harmonic frequency of the main resonant mode.