Low power actuator and valve-actuator combination
US8006952B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 2005 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Feb 1, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/108
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Actuators and valve-actuator combinations are disclosed which require low power for actuation, and which are particularly suitable for use to control a valve associated with a pipeline. Such an actuator (20) comprises a thrust member (26) moveable between two end of travel positions, an annular rotor having magnetic poles, an annular magnetisable stator having at least one winding and poles with which the rotor poles are aligned in each of a plurality of rotational positions of the rotor relative to the stator, and a drive connection between the rotor and the thrust member which is adapted to convert rotational movement of the rotor into linear movement of the thrust member. The actuator is able to hold its position using minimal energy, and may be located within or around an associated pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.