Patent · US Active

Piezohydraulic actuator

US10690154B2 · kind B2 · utility

3Cited by

4References

13Claims

0Family size

Assignee

MetisMotion GmbH · DE

Inventors

Wolfgang Zöls · Markt Indersdorf, DE
Iason Vittorias · Hersbruck, DE
Georg Bachmaier · Birkenfeld, DE

Key dates

Filing date	Apr 21, 2017
Grant date	Jun 23, 2020
Priority date	—
Expiry date	Jun 10, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH02N2/043
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A piezohydraulic actuator system includes four chambers: a first chamber defined by a drive bellows filled with a hydraulic fluid and movable by a piezo actuator, a second chamber defined by a hydraulic cylinder filled with the hydraulic fluid, which defines a first output; a third chamber defined by an output bellows filled with the hydraulic fluid, which defines a second output; and a fourth chamber defining a reservoir of the hydraulic fluid. The drive bellows is hydraulically connected via a first check valve to the second chamber. A hydraulic piston in the hydraulic cylinder is coupled mechanically to the output bellows. The drive bellows is hydraulically connected via a second check valve to the fourth chamber. The hydraulic fluid reservoir is hydraulically connected via a third check valve to the output bellows, and the hydraulic cylinder is hydraulically connected via a fourth check valve to the output bellows.

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