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:
Oct. 14, 1980
Filed:
Oct. 18, 1978
Isamu Shirai, Isesaki, JP;
Sankyo Electric Company Limited, Isesaki, JP;
Abstract
An annular armature plate of an electromagnetic clutch is provided with circular grooves in an axial end surface corresponding to the location of concentric slits of a cooperating clutch element made of a magnetic materials to define magnetic pole pieces. The armature plate further includes corresponding press-formed circular projections on the opposite end surface thereof, in order to strengthen the magnetic attraction between the armature plate and the cooperating clutch element. The armature plate may be supported on and joined to a rotatable member by leaf springs and may be provided with pin-like projections formed on the axial end surface thereof to fix the leaf springs to the armature plate. A radial flange of the rotatable member supporting the armature plate may be provided with projections with flat end surfaces on which the leaf springs are fixed without the use of washers.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile