Drive unit and information recording device

Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

07663291

ABSTRACT:
The present invention may provide a accurate drive unit1which comprises an electromechanical transducer10, a drive element12fixed on the one end of the electromechanical transducer10, a movable element11engaging with the drive element12frictionally and a drive circuit3applying a cyclic drive voltage to the electromechanical transducer10, in which the oscillation of the drive element12as the result of the expansion and contraction of the electromechanical transducer10due to the drive voltage causes relative displacement of the movable element11to the drive element12. The waveform of drive voltage is varied according to the relative position of the movable element11to the drive element12.

REFERENCES:
patent: 6483226 (2002-11-01), Okada
patent: 6844658 (2005-01-01), Hoshino
patent: 7154210 (2006-12-01), Hoshino
patent: 7315164 (2008-01-01), Hata et al.
patent: 2004/0036382 (2004-02-01), Yuasa et al.
patent: 6-180871 (1994-06-01), None
patent: 2000-78861 (2000-03-01), None
patent: 2000-350482 (2000-12-01), None
patent: 2001-211669 (2001-08-01), None
patent: 2001-211669 (2001-08-01), None
patent: 2001-268951 (2001-09-01), None
patent: 2002-95272 (2002-03-01), None
patent: 2002-233173 (2002-08-01), None
patent: 2003-199374 (2003-07-01), None
patent: 2003-203440 (2003-07-01), None
patent: 2003203440 (2003-07-01), None
patent: 2004-80964 (2004-03-01), None
patent: 2004-080964 (2004-11-01), None
Japanese “Notification of Reason for Refusal”, dated Nov. 25, 2008, for counterpart Japanese Patent Application No. 2004-139459; Together with an English-translation thereof.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Drive unit and information recording device 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 unit and information recording device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drive unit and information recording device will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4213040

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.