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:
Nov. 09, 2021
Filed:
May. 31, 2019
Applicant:
Takahisa Koike, Tokyo, JP;
Inventor:
Takahisa Koike, Tokyo, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 5/56 (2016.01); H02P 5/753 (2006.01);
U.S. Cl.
CPC ...
H02P 5/56 (2016.02); H02P 5/753 (2013.01);
Abstract
A drive device includes a first motor, a second motor, and circuitry. The first motor includes a first rotation detector and is configured to rotate a driven shaft to apply a driving torque to the driven shaft. The second motor includes a second rotation detector and is configured to rotate the driven shaft to reduce backlash between the first motor and the driven shaft. The circuitry is configured to control the first motor and the second motor, based on a detection signal of the second rotation detector.