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. 26, 1985
Yuzo Sekiguchi, Kiryu, JP;
Enjiro Maejima, Kiryu, JP;
Ogura Clutch Co., Ltd., Gunma, JP;
Abstract
An electromagnetic coupling device is configured so that divided armatures disposed opposite to an electromagnetic flux producing member are magnetically attracted in a stepwise manner. When applied to an electromagnetic clutch, the coupling device comprises an output pulley serving as the magnetic flux producing member provided with a yoke in which an excitation coil is incorporated, an input pulley disposed coaxially with the output pulley and adapted to be coupled therewith when the excitation coil is energized, and a plurality of annular armatures adapted to be fastened to the input pulley and having diameters different from each other. The coupling device further comprises armature supporting leaf springs provided on an axial end of the input pulley and elastically supporting the armatures in such a manner that they are disposed concentrically with the input pulley and are spaced in an axial direction with respect to the output pulley through magnetic gaps, and detour magnetic flux adjusting portions formed on an axial end of the output pulley. The dimensions of the adjusting portions and the lengths of the magnetic gaps vary in a stepwise manner with respect to the armatures, respectively, thus providing an excellent progressive coupling between the magnetic flux producing member and the armatures.