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:
Apr. 27, 1993
Filed:
Feb. 15, 1991
Friedrich Perrot, Lengnau, CH;
Eta SA Fabriques d'Ebauches, Granges, CH;
Abstract
The invention concerns an electromagnetic micromotor. Such micromotor includes a rotor constituted by a permanent magnet (52) partially embedded in an overmolding (54) formed from plastic material and which is provided with coupling means to a driven mechanism, a cage (60) including a bottom and a cover and intended to be engaged in the interior of a stator while the rotor is mounted for free rotation in the cage, and rotation guide means for the rotor (50) in the cage (60), such micromotor being characterized in that the rotation guide means are constituted, on the one hand, by two housings (74, 76) coaxially arranged in the overmolding (54), and on the other hand, by two spindles (78, 80) respectively integral with the bottom and the cover of the cage and intended to be accommodated respectively in one of these housings. Such micromotor is intended to equip timepiece movements of very small dimensions, for instance for ladies' watches.