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Brevet : EP1392988 - CIRCUIT DE COMMANDE HYDRAULIQUE DESTINE A UNE TRANSMISSION VARIABLE EN CONTINU
Titre
CIRCUIT DE COMMANDE HYDRAULIQUE DESTINE A UNE TRANSMISSION VARIABLE EN CONTINU
N° et date de publication de la demande
EP1392988 - 03/03/2004
Type de la demande
A1
N° et date de dépôt
EP02730473.2 - 31/05/2002
N° et date de priorité
GB0113523 - 04/06/2001
Classification CIB
Classification CPC
Abrégé
A hydraulic circuit for a continuously variable transmission having a continuously variable ratio unit that is controlled by at least one hydraulic actuator acting on a movable torque transmission element. The actuator has opposed first and second working chambers. The circuit includes first and second flow lines that are connected to two respective actuator working chambers. The lines feed fluid thereto and therefrom A pressurized supply of fluid urges fluid flow through the flow lines. A variable control valve is incorporated in both flow lines. Each valve generates an adjustable back pressure therein. A further valve is connected between the two flow lines. The further valve has a variable opening and is located upstream of the variable control valve. Opening of the further valve enables flow fluid from one flow line to the other to reduce pressure difference between the lines.
INTERVENANTS
Déposant
TOROTRAK DEV LTD (TOROTRAK (DEVELOPMENT) LIMITED) - GB
Titulaire
TOROTRAK (DEVELOPMENT) LIMITED
Inventeur
FULLER JOHN WILLIAM EDWARD (FULLER, JOHN, WILLIAM, EDWARD) - GB
Mandataire
GEVERS & ORES - IMMEUBLE LE PALATIN 2 3 COURS DU TRIANGLE - 92939 PARIS LA DEFENSE CEDEX - FR
STATUT EN FRANCE : Déchu
Délivrance
22/09/2004
Remise de traduction du brevet
05/08/2005 (BOPI 2005-31)
Registre national des brevets (RNB)
10/11/2023 - N°0260600 - OO : Dérogation à la compétence de la Juridiction Unifiée du Brevet (BOPI 2023-51)
Date de constatation de déchéance
-
31/01/2008 (BOPI 2008-10)
Dernière annuité payée
27/05/2006
Quantième- N° de l'annuité payée
5
Date de paiement de la prochaine annuité
31/05/2007
