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. 13, 1982
Filed:
Mar. 04, 1980
Noboru Sakai, Tachikawa, JP;
Tokuo Shimizu, Hachioji, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A thrust preventive device for the output shaft of an electric motor comprises an electric motor having one end face from which an output shaft is projected and a rotating force transmitting member secured outside the motor to a portion of the output shaft which is projected from the one end face of the motor. The one end face of the motor has a recess therein. The rotating force transmitting member comprises a fly-wheel and a pulley. The fly-wheel has one end face which opposes the one end face of the motor and another face which is connected to the pulley. A projection which is formed of iron is provided on the one end face of the fly-wheel and projects toward the one end face of the motor and into the recess. The projection is attracted in one direction taken along a central axis of the output shaft by the magnetic force from the permanent magnets which are located in the motor housing to rotate the output shaft. Therefore, the output shaft is biased in said one direction and is kept at a position thus biased.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile