The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 12, 1984
Filed:
Feb. 03, 1983
Toshihiko Taniguchi, Osaka, JP;
West Electric Company, Ltd., Osaka, JP;
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.