Patent ID: 8201753
Filing Date: 2012-06-19
Classification: H01L

Abstract:
1. An actuator module having a piezoelectric actuator, comprising: elements disposed between an actuator head and an actuator foot; an elastomer layer surrounding at least the elements; and a fluid-tight sheath disposed over the elastomer layer and surrounded elements, the sheath, at least in some regions, having grooves formed by undulations, with which, by alignment of the grooves on a circumference of the sheath, radial and/or axial expansion motions of the piezoelectric actuator and/or of the elastomer layer can be absorbed, wherein the sheath is a telescoping sheath formed of telescoping tubes, movably guided longitudinally inside one another without rotating, of which at least one has the grooves, formed on its circumference in some regions by undulations, with which, by alignment of the grooves on the circumference of the sheath, radial and/or axial expansion motions of the piezoelectric actuator and/or of the elastomer layer can be absorbed, and longitudinal expansion between the two telescoping tubes of the telescoping sheath is possible.