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:
Aug. 04, 2009
Filed:
May. 31, 2006
Oscar D'almeida, Boulogne Billancourt, FR;
Mathias Woydt, Berlin, DE;
Jean-thierry Audren, Saint Remy les Chevreuses, FR;
Oscar D'Almeida, Boulogne Billancourt, FR;
Mathias Woydt, Berlin, DE;
Jean-Thierry Audren, Saint Remy les Chevreuses, FR;
Sagem Defense Securite, Paris, FR;
Abstract
The invention concerns an actuator which includes a linear piston () in an active material, and an inner sliding cylinder (') which includes an outer cylinder (′) in which the said sliding cylinder ((′) is pre-stressed, with one cylinder being in an anisotropic material with a negative or approximately zero expansion coefficient along at least one axis and a positive or approximately zero expansion coefficient on at least one other axis, and the other cylinder having a positive thermal or approximately zero expansion coefficient.