Low cost precision linear actuator and control system
US7321175B2 · kind B2 · utility
7Cited by
8References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2005 |
| Grant date | Jan 22, 2008 |
| Priority date | — |
| Expiry date | Aug 13, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Embodiments of the present invention relate to a linear actuator in which the play and backlash in the linear motion of a stepper motor is reduced through the use of a torsion spring coupled to the stepper motor splined shaft. Also, embodiments of the invention include a controller designed for holding in the hand or mounting to a table with a bi-directional self-zeroing control knob which controls actuator speed and displacement. A flash memory unit may be included in some embodiments in order to save position information and other information about the linear actuator when power to the linear actuator is stopped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.