Patent · US Active

Rotary motor with ultrasonic actuator

US11218089B2 · kind B2 · utility

0Cited by

1References

20Claims

0Family size

Assignee

PHYSIK INSTRUMENTE (PI) GMBH & CO. KG · DE

Inventors

Burhanettin Koc · Ettlingen, DE
Thomas Polzer · Graben-Neudorf, DE

Key dates

Filing date	Jun 22, 2018
Grant date	Jan 4, 2022
Priority date	—
Expiry date	Dec 6, 2038

Classification

Technology area (CPC H)Electricity
CPC primaryH02N2/12
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A rotary ultrasonic motor includes an ultrasonic actuator, a driven element, an inner casing member and an outer casing member. A piezoelectric or electrostrictive or magnetostrictive material is arranged between an excitation electrode and at least one general electrode. The ultrasonic actuator is between the inner and outer casing members of a casing, and is directly or indirectly in contact with the element to be driven, so that periodic deformations generated in the ultrasonic actuator by electrical excitation are transferable to the drive element. The ultrasonic actuator is mounted by a retaining device arranged on the casing with at least one retaining section which engages in a recess associated with a respective retaining section.

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