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:
Sep. 22, 1992
Filed:
Nov. 15, 1990
Hiroaki Nakamura, Ise, JP;
Shinko Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An electromagnetic coupling device is proposed to obviate several drawbacks in the conventional devices, namely, to prevent loose fixing in axial direction which gives rise to undesirable rotation of the rotary shaft following the rotor, to reduce the production cost due to the use of magnetic pole in the rotor, to reduce lengthy lengthy assembly work brought about by many fixing rings and to prevent slipping out of the hub and the rotary shaft encountered in the conventional coupling devices. In order to obviate the drawbacks encountered in the conventional coupling device, a rotor retainer is placed around the rotary shaft to urge a rotor against a hub, in addition, the rotary shaft is provided with fixing portions of a minimum number, such as axially extending legs at least one of which is attached with a claw, stepped portions, a groove and so forth for preventing slipping out of the rotary shaft, hub and driven shaft. By virtue of such simplified structure, assembly of the related parts and components has remarkably reduced together with reduced production cost.