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:
May. 25, 1976
Filed:
Sep. 03, 1974
Manfred Rick, Stuttgart, DT;
Rolf Busch, Hildesheim, DT;
Klaus Renz, Stuttgart, DT;
Gunter Weber, Renningen, DT;
Werner Mann, Gerlingen, DT;
Helmut Schlaich, Rutesheim, DT;
Ernst Rohm, Fellbach, DT;
Rudeger Luders, Stuttgart, DT;
Manfred Wilhelm, Nussdorf, DT;
Robert Bosch G.m.b.H., Stuttgart, DT;
Abstract
Annular metallic blanks which consist of packages of interconnected laminae or of sheet metal strips which are coiled edgewise and whose strata are riveted or otherwise secured to each other are converted into stators for electrical machines by cold forming between upper and lower dies and outer and inner calibrating members so that the inner diameter of each blank is increased during cold forming, that the peripheral surface of the stator has two cylindrical portions flanking a convex median portion, and that the outermost portions of the end surfaces of the stator are formed with annular recesses. Prior to cold forming, each blank is subjected to a preliminary shaping treatment including chamfering the axial ends of its internal and peripheral surfaces.