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:
Jul. 31, 2001
Filed:
Oct. 13, 1998
Applicant:
Inventor:
Jean Thierry Audren, St Rémy les Chevreuse, FR;
Assignee:
SFIM Industries, Massy, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 4/108 ;
U.S. Cl.
CPC ...
H01L 4/108 ;
Abstract
An actuator, comprising a plurality of stacks of unit blocks of an active material of the piezoelectric, electrostrictive, or magnetostrictive type, which blocks are distributed so as to form a tubular structure, together with means enabling an electric or magnetic field to be applied to said unit blocks to cause said unit blocks to deform in such a manner that the tubular structure twists.