Shutter assembly with drive ring-mounted magnet
US8313255B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2009 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | Apr 23, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A shutter assembly includes a drive ring having a permanent magnet disposed thereon. The shutter assembly also includes a solenoid defining a gap between first and second magnetic poles thereof, the drive ring being disposed coplanar with the solenoid and being rotatable in response to a magnetic field created between the first and second magnetic poles. The shutter assembly also includes a plurality of shutter blades configured to transition between an open position and a closed position in response to rotation of the drive ring. The shutter assembly further includes a base plate separating the plurality of shutter blades from at least one of the drive ring and the solenoid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.