Piezoelectric driving apparatus

Details Piezoelectric driving apparatus Piezoelectric driving apparatus

1983-02-03

1984-06-12

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310369, 310366, H01L 4108

Patent

active

044544413

ABSTRACT:
A number of piezoelectric discs are stacked with electrodes inbetween for application of DC voltage thereto through a pair of lead wires, forming piezoelectric blocks, and a plurality of the piezoelectric block are stacked to form a moving member, which is inserted in a fixed member, a hollow case of rigid material such as steel; by applying voltages to electrodes of selected piezoelectric blocks, any selected block(s) can be driven either to decrease or increase the diameter and increase or decrease the thickness, thereby fixing selected block(s) to the fixed means or releasing of the fixing can be made freely and individually; and by appropriately combining voltage impressions timings and polarities to individual piezoelectric blocks, motion of the moving member in relation to the fixed member, for instance in a measuring worm-like way, is obtainable.

REFERENCES:
patent: 3377489 (1968-04-01), Brisbane
patent: 3389274 (1968-06-01), Robertson
patent: 3390559 (1968-07-01), Steutzer
patent: 3649856 (1972-03-01), O'Neill
patent: 3684904 (1972-08-01), Galutva et al.
patent: 3902084 (1975-08-01), May, Jr.
patent: 3902085 (1975-08-01), Bizzigotti

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