A gas meter provided with improved guide means

Details A gas meter provided with improved guide means A gas meter provided with improved guide means

G - Physics

01

F

G01F 3/22 (2006.01)

Patent

CA 2332233

The invention concerns a gas meter comprising several measuring chambers (26) with deformable membranes (28), a dispensing element (64) mounted rotating about a so-called axis of rotation over a dispensing surface (42f) wherein are provided several orifices (44, 46, 48, 50) each connected to a measuring chamber, said dispensing element enabling the gas to alternately enter and leave the measuring chambers during the rotating movement, means for guiding said dispensing element in rotation comprising a guiding part (94) whereof at least one portion has a general elongated shape along said axis of rotation and comprising two cylindrical portions (96, 98b) distant from each other and two bearings (104a, b) wherein said cylindrical portions are mounted freely rotating. The invention is characterised in that said guiding part (94) is made of a thermoplastic material and the cylindrical portions (98a, b) have different diameters.

L'invention est relative à un compteur de gaz comprenant plusieurs chambres de mesure (26) à membranes déformables (28), un élément de distribution (64) monté rotatif autour d'un axe dit de rotation sur une surface de distribution (42f) dans laquelle sont ménagés plusieurs orifices (44, 46, 48, 50) qui sont reliés chacun à une chambre de mesure, ledit élément de distribution permettant au gaz alternativement d'entrer et de sortir des chambres de mesure au cours du mouvement de rotation, des moyens de guidage en rotation dudit élément de distribution comprenant, d'une part, une pièce de guidage (94) dont au moins une partie a une forme générale allongée suivant ledit axe de rotation et qui comprend deux portions cylindriques (96, 98b) éloignées l'une de l'autre et, d'autre part, deux paliers (104a, b) dans lesquels lesdites portions cylindriques sont montées libres en rotation, caractérisé en ce que la pièce de guidage (94) est réalisée dans un matériau thermoplastique et en ce que les portions cylindriques (96, 98b) ont des diamètres différents.

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