Rotary actuators
US3949250A · kind A · utility
8Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1974 |
| Grant date | Apr 6, 1976 |
| Priority date | — |
| Expiry date | Mar 11, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/145
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotary actuator comprises a stator structure defining a magnetisable pole piece and an angularly movable rotor structure which defines a pole element. The pole piece and pole element form part of a magnetic circuit and a winding is provided about a portion of the magnetic circuit defined by the rotor and stator structures. The faces of the pole piece or pole element which are presented to each other are provided with a slot or a cutaway portion which extends along at least part of the circumferential length of the face whereby a desired torque/angle characteristic is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.