| 摘要 |
Device for dispensing a product according to predetermined metered quantities, in which the product to be dispensed is enclosed in a reservoir comprising an outlet orifice and with which means are associated which permanently tend to eject the product from the said reservoir. It comprises, on the outlet path for the product out of the said reservoir 10, two adjacent valves or flaps 30, 32, 31, 34 each comprising a calibrated nozzle able to be opened and/or closed, each corresponding to the condition of a deformable piezoelectric crystal 33, 35 and electronic control means 40 for the deformation of the said crystals in order to limit the output of the product out of the said reservoir and thus define a predetermined metered quantity. Application: metering of medication products, for example for injection apparatus. <IMAGE>
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