Rotary positioning apparatus and associated methods, such as for a carburetor choke valve
US4458228A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 3, 1981 |
| Grant date | Jul 3, 1984 |
| Priority date | — |
| Expiry date | Nov 3, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K26/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Rotary positioning apparatus for a member movable through an angle of rotation of less than 360.degree. comprising a rotor including windings thereon and a stator including a permanent magnet establishing a magnetic circuit providing magnetic flux through which the rotor is movable, the rotor and stator constituting a DC motor. The stator includes a stationary hollow shaft on which the rotor is rotatably supported by bearings. The rotor includes a neck adapted for being coupled with the member to be moved. A plurality of flexible current carrying wires extend through the hollow shaft and through slots provided in the neck to the windings for energization thereof. The hollow shaft has opposite open ends at one of which the wires enter the hollow shaft and at the other of which the wires exit from the shaft and extend through the slots to the windings such that the wires undergo twisting within the confines of the shaft as the rotor rotates with respect to the stator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.