Patent · US Active

Piezoelectric actuator module having a sheath, and a method for its production

US7872398B2 · kind B2 · utility

0Cited by

2References

14Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Rudolf Heinz · Renningen, DE
Dieter Kienzler · Leonberg, DE
Udo Schaich · Stuttgart, DE
Thomas Pauer · Freiberg, DE

Key dates

Filing date	Apr 18, 2007
Grant date	Jan 18, 2011
Priority date	—
Expiry date	Sep 7, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/42
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A piezoelectric actuator module having a multilayer structure of piezoelectric elements is proposed as a piezoelectric actuator, wherein a different polarity of an electric voltage is alternately applied to inner electrodes which are arranged between piezoelectric layers of the piezoelectric elements in the direction of the layer structure of the piezoelectric elements, said module having an actuator foot and an actuator head composed of steel and having an elastic insulation medium which surrounds at least the piezoelectric elements in predefined limits. At least one annular groove or recess, into which a material which can be crosslinked with the insulation medium is vulcanized, is provided on the actuator foot and/or on the actuator head, and a flexible, weldable hose or sheath lies encompasses the piezoelectric element, and at least above the grooves or recesses containing the material as an insulation medium the weldable hose is welded to the material in the grooves or recesses.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.