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:
Mar. 23, 2021
Filed:
Mar. 28, 2018
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Tomohisa Iwazaki, Okaya, JP;
Yutaka Arakawa, Hara-mura, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02N 2/14 (2006.01); B41J 2/045 (2006.01); B25J 9/12 (2006.01); H02N 2/00 (2006.01); H02N 2/10 (2006.01); H02N 2/02 (2006.01);
U.S. Cl.
CPC ...
H02N 2/14 (2013.01); B25J 9/123 (2013.01); B25J 9/126 (2013.01); B41J 2/04541 (2013.01); B41J 2/04581 (2013.01); H02N 2/0015 (2013.01); H02N 2/0055 (2013.01); H02N 2/026 (2013.01); H02N 2/103 (2013.01); Y10S 901/23 (2013.01);
Abstract
A piezoelectric drive device includes a piezoelectric actuator which includes a vibration portion that vibrates and a protruding portion that protrudes from the vibration portion, a driven member, an optical scale, a sensor which receives transmitted light or reflected light from the optical scale and outputs a signal in accordance with intensity of the received light, in which a facing area of the optical scale and the sensor is disposed to be deviated to one side in a direction in which the optical scale and the sensor are aligned with respect to a contact portion between the protruding portion and the driven member.