Translation and rotation positioning motor

US6849989B2 · kind B2 · utility

Inventors

• Andreas Schmid · Duisburg, DE
• Oliver Schaff · Berlin, DE

Key dates

• Filing date: Oct 31, 2002
• Grant date: Feb 1, 2005
• Expiry date: Feb 14, 2023

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02N2/025
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A positioning device provides the capability of moving an object in both a linear and a rotational direction. The positioning device includes a first piezo stack with plural piezo plates that are capable of movement in orthogonal directions with respect to each other. The positioning device further includes a second piezo stack with plural piezo plates that are capable of movement in orthogonal directions with respect to each other. The positioning device also includes a first bearing that is disposed against the first piezo stack. The positioning device further includes a second bearing that is disposed against the second piezo stack. The positioning device also includes a spring element and a fifth bearing that is disposed against the spring element. The first through fifth bearings are disposed around and against the object to be positioned, to provide for positioning of the object in at least one of a linear direction and a rotational direction.