Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids
Reexamination Certificate
2005-03-08
2005-03-08
Jackson, Stephen W. (Department: 2836)
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
For relays or solenoids
C361S152000, C361S203000
Reexamination Certificate
active
06865064
ABSTRACT:
A drive apparatus for an electromagnetic drive type actuator, which includes a movable element, a fixed element, a connection element, a magnetic field generation element, and a drive coil, such that the movable element is caused to oscillate by an interaction between a current flowing through the drive coil and a magnetic field generated by the magnetic field generation element, comprises a drive signal supply element, which supplies to the drive coil a current signal with a periodic waveform that has a frequency substantially equal to a resonance frequency of the movable element and whose current value is zero in a fixed period in one cycle, and an oscillation detection element, which detects an oscillation state based on a timing of a zero-cross point of a voltage waveform between both ends of the drive coil in a period corresponding to the period in which the current value is zero.
REFERENCES:
patent: 4796112 (1989-01-01), Mizukami et al.
patent: 5168203 (1992-12-01), Tepavcevic
patent: 5739651 (1998-04-01), Miyazawa et al.
patent: 6133701 (2000-10-01), Gokturk et al.
patent: 6693622 (2004-02-01), Shahoian et al.
patent: 0 692 729 (1996-01-01), None
patent: 1 191 678 (2002-03-01), None
patent: 10-207973 (1998-08-01), None
patent: 11-242180 (1999-09-01), None
patent: 2001-305471 (2001-10-01), None
Patent Abstracts of Japan Publication No. 63223613, published Sep. 19, 1988 (Japanese application No. 62057125, date of application Mar. 12, 1987).
Patent Abstracts of Japan Publication No. 10207973, published Aug. 7, 1998 (Japanese application No. 09046876, date of application, Jan. 23, 1997).
Patent Abstracts of Japan Publication No. 64002015, published Jan. 6, 1989 (Japanese application No. 62158219, date of application, Jun. 25, 1987).
Miyajima, H., et al., “An Electromagnetic Optical Scanner With Polyimide-Based Hinges”, 10th International Conference on Solid-State Sensors and Actuators (Transducers 1999), Jun. 7-10, 1999, Sendai, Japan, pp. 372-375.
Miyajima Hiroshi
Nishio Masahiro
LandOfFree
Drive apparatus and drive method for electromagnetic drive... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drive apparatus and drive method for electromagnetic drive..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drive apparatus and drive method for electromagnetic drive... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3413685