Piezoelectric Movement Device

Simple SummaryContent extracted from patent full text and abstract with AI.

This invention describes a piezoelectric movement device, particularly a compact motor, that employs a novel arrangement of piezoelectric elements to enable both highly-precise linear (translational) and rotational movements. Instead of traditional single-layer actuators, it uses bimorph (two-layer) piezoelectric structures at the ends, along with obliquely or spirally arranged electrodes, to produce greater force, improved stability, lower wear, and the ability to function reliably across a wider temperature range—including deep cryogenic environments. The design allows for an object inside the device to be moved or rotated with high accuracy, without the need for lubricants.

Use CasesContent extracted from patent full text and abstract with AI.

• Nanopositioning in scientific equipment such as scanning tunneling microscopes or atomic force microscopes
• Optical equipment, such as fine adjustment of lenses in cameras or microscopes
• Precision robotics, where high-accuracy controlled linear/rotary motion is required
• Space and aerospace applications, including equipment that needs to operate in vacuum and/or at very low temperatures
• Medical devices that require compact, reliable, and precise miniature actuation
• Micro-electromechanical systems (MEMS) actuators and manipulators
• High-vacuum environments where lubricant-free motors are necessary

BenefitsContent extracted from patent full text and abstract with AI.

• Enables both extremely fine linear and rotational movement in a single compact device
• Significantly increases output force and stroke compared to traditional piezoelectric actuators
• Operates reliably across wide temperature ranges, including cryogenic conditions
• Reduces wear and increases device lifetime due to the use of intermediate bodies that minimize direct friction between moving parts
• Eliminates the need for lubricants, making it suitable for vacuum or clean-room environments
• Improved precision and stability in movement, with very small step sizes possible (nanometer scale)
• Expanded range of applications compared to conventional piezoelectric "inchworm" motors, especially where robustness and versatility are required

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention relates to a piezoelectric movement device, in particular a motor, with a piezoelectric apparatus, which has a middle area and two end areas, and with a movement body, which is mounted on or in a mount or the piezoelectric apparatus, wherein one end area is designed or both end areas are designed to exert a force in the direction of the movement body, in particular diagonally and axially or transversely of the axis to a longitudinal axis of the piezoelectric apparatus, on the movement body. The invention is characterized in that the middle area is a piezoelectric body and the end areas each comprise at least two piezoelectric bodies, which are connected with each other, in particular via contact surfaces.