Flow meter

G - Physics – 01 – F

Patent

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Details

G01F 1/115 (2006.01) F02M 37/04 (2006.01) G01F 3/10 (2006.01)

Patent

CA 2235211

The invention concerns a device for measuring amounts of fluids, in particular liquid fuels in petrol pumps, with at least two interengaging screw spindles through which a liquid can flow in the axial direction and which are each mounted at the ends in a housing so as to rotate with easy action. The housing comprises a measuring chamber through which liquid can flow and in which an exciter disc, which is rigidly connected to one of the spindles, can rotate in order to cooperate with a detector at the housing end. According to the invention, in order to provide a flow meter which is favourable from the point of view of manufacturing technology and whose operation is improved, the exciter disc (4) comprises a plurality of magnets (5) which are disposed in a circle and act in the axial direction of the disc (4). In given regions the exciter disc (4) penetrates a gap (13) in the housing where at least two magnet-sensitive detectors (6, 6') disposed in the wall region (13') of the gap engage above or below the disc.

L'invention concerne un dispositif servant à mesurer des quantités de liquide, notamment de carburant liquide dans des distributeurs d'essence, comportant au moins deux broches hélicoïdales qui s'engrènent et à travers lesquelles le liquide s'écoule dans le sens axial, et dont chacune est montée aux extrémités dans un boîtier, de manière à tourner facilement. Le boîtier comprend une chambre de mesure pouvant être traversée par le liquide, dans laquelle un disque d'excitation solidarisé à une des broches peut tourner, afin de coopérer avec un détecteur situé côté boîtier. Selon l'invention, afin de mettre au point un débitmètre plus avantageux à produire et plus performant, il est prévu que le disque d'excitation (4) comporte une pluralité d'aimants (5) disposés en arc de cercle et agissant dans son sens axial, et que par endroits, ledit disque entre dans une fente (13) du boîtier, avec au moins deux détecteurs magnétosensibles montés dans la zone (13') de la paroi de la fente et qui enserrent le disque par-dessus ou par-dessous.

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