Electric reciprocating motion device with spring motor
US7960877B2 · kind B2 · utility
Inventor
Key dates
| Filing date | May 14, 2009 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | May 14, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K33/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric reciprocating motion device includes a motor having a rotary shaft for outputting a reciprocating rotational power and a motion head coupling with the rotary shaft and being driven to move in a reciprocating motion along an axis of the rotary shaft and in a predetermined swing angle range. The motor is a spring motor including a motor unit and a torsion spring having two ends affixing at a motor housing and to the rotary shaft respectively. After the rotary shaft outputs a mechanical torque at one rotational direction, the torsion spring applies a spring force against the rotary shaft to drive the rotary shaft to rotate backward for generating the reciprocating rotational power. Using the spring motor in the electric reciprocating motion device, the device achieves the goals of simple mechanical structure, small volume, easy to install, and low in cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.