BOPI 04 BR/2023 REPERTOIRE NUMERIQUE 40 (11) 20924 (51) H02K 1/27 (2018.01); H02K 16/04 (2018.01); H02K 19/20 (2018.01); H02K 19/24 (2018.01); H02K 21/12 (2018.01); H02K 21/14 (2018.01); H02K 21/16 (2018.01) (21) 1202200448 - PCT/IB2021/053898 (22) 07/05/2021 (30) ZA n° 2020/02703 du 13/05/2020 (54) An electric generator having plural stators. (72) MAKGERU, Kabu, Walter (ZA) (73) THE TRUSTEES FOR THE TIME BEING OF THE KMN FULFILMENT TRUST, 8 Kestrel Street, Ebotse Golf Estate, Rynfield, 1504 BENONI (ZA) (74) S.C.P AKKUM, AKKUM & Associates, No. 1777, rue 6.261, Yaoundé, Auditorium Jean Paul II, Quartier Mbankolo, B.P. 4966, YAOUNDE (CM). (57) An electric power generator comprises a rotor and a plurality of stators arranged coaxially and concentrically about a central axis. A first stator is provided concentrically around and adjacent to the rotor, the rotor and the first stator being separated by a rotor-stator airgap and a second stator is provided concentrically around and adjacent to the first stator, the first and second stators being separated by a stator-stator airgap. The rotor includes a plurality of magnetic pole structures configured to provide or generate a plurality of magnetic poles and a radially outer surface of each of the magnetic pole structures is curved with an average radius of curvature which is less than an average distance between the outer surface and the central axis. The rotor-stator airgap thus varies circumferentially in distance, with a shortest distance being at a circumferential centre of each of the magnetic pole structures and longest distance being at circumferential ends of each of the magnetic pole structures. The statorstator airgap is of uniform thickness. Fig. 1 Consulter le mémoire ________________________________________ (11) 20925 (51) A61B 17/00 (2018.01); A61B 17/56 (2018.01); A61B 17/64 (2018.01) (21) 1202200456 (22) 29/09/2022 (54) Système de fixation externe en orthopédie traumatologie. (72) Prof GOGOUA Dallo Raphael (CI) (73) Prof GOGOUA Dallo Raphael, 05 B.P. 2836, ABIDJAN 05 (CI) (57) L'invention concerne un fixateur orthopédique externe à trois éléments, destiné au traitement des fractures ouvertes ou non, et disposant de ses propres ancillaires. Ses trois éléments sont la tige (8), les fiches (4) et les écrous (3 et 6). La tige est un tube cylindrique, parfois polygonal, pourvu d'un filetage millimétré, et parcouru par un sillon (7) extensible et auto-contractile sur la majeure partie de sa longueur. Elle peut être surmontée d'un tube secondaire de structure similaire. Les écrous (3,6) sont à sections polygonales, perforés ou non, et filetés, sauf l'écrou reliant la tige-volant. Le vissage des écrous dans un sens comme dans
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