Push-pull high force piezoelectric linear motor
US6246157A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1999 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Aug 23, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/023
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high force linear displacement piezoelectric motor operates with equal force and reliability in both the push and pull mode. The new motor includes a split motor shaft having with two shaft segments that are coaxially affixed to opposite sides of an expandable and contractable displacement actuator. The displacement actuator has a piezoelectric body coincident with the axis of the shaft segments such that the expansion of the piezoelectric body increases the length of the split motor shaft. The motor has a set of clamps that receive and close on the shaft segments to hold them in place, or open to allow axial displacement of the shaft segments. Linear motion of the split shaft motor is produced by coordinating the opening and closing the clamps with the expansion and contraction of the piezoelectric body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.