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:
Jan. 13, 1987
Filed:
Mar. 06, 1985
Applicant:
Inventor:
Norihide Kunikawa, Yao, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
318436 ; 318 40 ; 318254 ; 355 / ;
Abstract
A copying apparatus equipped with a brushless DC motor for driving a light source, a photoreceptor drum, etc. and including a motor locking circuit for locking the DC motor. The motor locking circuit, when an external force has been applied to a rotor of the DC motor while the DC motor is not being actuated, causes an electric current to flow through a stator coil of the DC motor such that the electric current produces a reaction force counteracting the external force.