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:
May. 23, 1995
Filed:
Feb. 04, 1994
Toshiki Hirano, Tokyo, JP;
Tomotake Furuhata, Yokohama, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A micro-actuator suitable for a piezoelectric film is described. A slow deformation and a rapid deformation are repeatedly produced in a piezoelectric film by generating a first voltage pattern V1 having an essentially sawtooth waveform between a pair of electrodes on one side of a wall-like member and a second voltage pattern V2 having an opposite polarity to that of the first voltage pattern V1 between a pair of electrodes on the other side of the wall-like member. As a result, the wall-like member responds by moving slowly in a first direction and rapidly in a second direction. An object placed on the wall-like member is moved in the first direction, because the object can follow the slow movement of the wall-like member but cannot follow its rapid movement.