Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1997-12-23
2000-04-18
Dougherty, Thomas M.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
31032301, H02N 206, H02N 204
Patent
active
060519096
ABSTRACT:
A drive device using an electromechanical transducer having inconsiderable loss of drive energy and excellent drive efficiency even with variation in load in which an elastic member is arranged between a driven member frictionally coupled to a drive member and a frictional member fitted to an opening of the driven member whereby drive force is transmitted from the drive member to the driven member with no loss of energy, a frictional force between the drive member and the driven member is periodically changed, an average frictional force is increased when a shift between a phase of variation in a drive velocity and a phase of variation in the frictional force is null, when the shift between the phases is 180.degree., the average frictional force is adjusted to decrease whereby the drive efficiency can be promoted, and when the device is stopped, the drive device can be protected against unintentional external force bringing the drive member and the driven member into fixing contact with each other by an electromechanical transducer.
REFERENCES:
patent: 4195243 (1980-03-01), Thaxter
patent: 4894579 (1990-01-01), Higuchi et al.
patent: 5225941 (1993-07-01), Saito et al.
patent: 5589723 (1996-12-01), Yoshida et al.
patent: 5786654 (1998-07-01), Yoshida et al.
patent: 5847488 (1998-12-01), Yoshida et al.
patent: 5869918 (1999-02-01), Ashizawa
patent: 5907212 (1999-05-01), Okada
Fujita Junji
Nakano Haruyuki
Okamoto Yasuhiro
Shinke Satoshi
Sugimoto Yoshitaka
Dougherty Thomas M.
Minolta Co. , Ltd.
LandOfFree
Drive device using electromechanical transducer 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 device using electromechanical transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drive device using electromechanical transducer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2338332