Electromagnetic driving unit and light quantity regulating...

Details Electromagnetic driving unit and light quantity regulating... Electromagnetic driving unit and light quantity regulating...

2005-08-09

2005-08-09

Barrera, Ramon M. (Department: 2832)

Photography

Camera detail

Shutter

C310S046000, C310S049030, C310S156120, C335S272000

Reexamination Certificate

active

06926454

ABSTRACT:
An electromagnetic driving unit includes a rotor having a central shaft and formed of a permanent magnet with a hollow cylindrical shape; an inner yoke disposed on an inner circumferential side of the rotor; an outer yoke disposed on an outer circumferential side of the rotor; and a coil for exciting the inner yoke and outer yoke. The inner yoke has a shaft portion at an end portion thereof inserted into the rotor, and the shaft portion has a circular cross-section or an oval cross-section perpendicular to an axial direction of the shaft portion. The rotor has a bearing recess in an inner circumferential wall thereof, so that the shaft portion of the inner yoke slidably fits in the bearing recess.

REFERENCES:
patent: 3435392 (1969-03-01), Ouellette et al.
patent: 3898488 (1975-08-01), Erwin et al.
patent: 6719463 (2004-04-01), Aoshima
patent: 6756871 (2004-06-01), Suzuki et al.
patent: 6798987 (2004-09-01), Horiike
patent: 2002/0127013 (2002-09-01), Mizumaki et al.
patent: 2001-298936 (2001-10-01), None
patent: 2002-049076 (2002-02-01), None

Affiliated with

Also associated with

Rating

Electromagnetic driving unit and light quantity regulating... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electromagnetic driving unit and light quantity regulating..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic driving unit and light quantity regulating... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3455564