Anti-fraud liquid meters having a drive and driven magnets with double polarity faces
AssigneeSociete Anonyme de Production de Procedes de Comptage de l'Eau et Autres Liquides, SAPPEL
InventorChristophe Munck
Life of this patent
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Abstract
A liquid meter includes a housing with two compartments with respectively a motor member disposed in the path of movement of a stream of the liquid to be measured and a counter, the transmission of the movement of the motor member to the counter being carried out through the separation wall of the compartments with the aid of a magnetic drive device having a pair of magnets, the first magnet associated with the motor member having a face with double polarity in magnetic equilibrium with a face of double polarity of the magnet associated with the counter, each magnet has at least one double polarity on each of its other faces.
Claims12
Liquid meter, in particular a water meter, of the type comprising a housing (2) having two compartments (4, 5) comprising respectively a motor member (6) disposed in the path of movement of a flow (3) of the liquid to be measured and a counter (7) which, by demultiplication of a gear train (10), actuates an indicator (11) comprised by numerical drums (12), the transmission of the movement of the motor member (6) to the counter (7) being effected through a separation wall of the compartments (4, 5) with the aid of a magnetic drive device comprising a pair of magnets (8, 9), a first of said pair of magnets (8) associated with the motor member (6) having at least one face with double polarity (8') in magnetic equilibrium with a face of double polarity (9') of a second of said pair of magnets (9) associated with the counter (7),
- wherein each magnet (8, 9) has at least one double polarity on each of its other faces (8', 8", 9', 9").
Dependencies are inferred from the claim text.