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:
Jun. 02, 1987
Filed:
Dec. 30, 1985
Takatoshi Koitabashi, Annaka, JP;
Sanden Corporation, Gunma, JP;
Abstract
An electromagnetic clutch includes a first rotatable member of magnetic material having an axial end surface and a hollow portion in which an annular electromagnetic device is disposed in a stationary position. A second rotatable member, such as a drive shaft, is provided within the first rotatable member. A hub is secured on the second rotatable member and a magnetic armature plate is supported on and around the hub. The magnetic armature plate, which faces the axial end surface of the first rotatable member at a predetermined axial air gap, is capable of limited axial movement and is attracted to the first rotatable member when the electromagnetic device is energized to frictionally engage the first rotatable member. In particular, in the electromagnetic clutch of this invention, the first rotatable member includes an outer cylindrical member, an inner cylindrical member and an axial end plate member which has an axial end surface connected therebetween, with the outer diameter of the axial end plate member exceeding the diameter of the outer cylindrical member and the inner diameter being smaller than the diameter of the inner cylindrical member.