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:
Apr. 20, 1976
Filed:
Apr. 18, 1972
Applicant:
Inventor:
Yoshio Sakitani, Katsuta, JA;
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310-81 ; 318116 ; 318135 ; 310-83 ;
Abstract
A variable d.c. source is connected to electrodes provided on the inner and outer surfaces of a hollow cylindrical body formed of piezoelectric ceramic through a switch to achieve dilations of the body by a variable applied voltage. Leg members are fixed at both ends of said body member. Sliding members are further fixed on the lower surfaces of said leg members and are slidable on a base plate. Between said leg members and said base plate, d.c. sources are connected through switches to electrostatically fix the structure. The structure can be moved finely and stepwise in a predetermined direction by operating said switches.