| 摘要 |
FIELD: processes.SUBSTANCE: invention relates to a dispenser of thick and liquid substances free of preservatives. In device for dispensing thick liquid substance by manual dosing pump elastically deformable membrane is connected to a reservoir. Membrane seals said reservoir. Inside reservoir in axial direction there is an auxiliary return device located in constant contact with membrane. Return device comprises two elastically deformable sections taking into account various properties. In first section a constant return force of a specified value is applied to membrane and to return nozzle channel. Second section is located between first section and bottom of reservoir. In second section a return force is maintained, which is greater return force of first section. Return force of second section begins to operate only when membrane is subjected to action.EFFECT: technical result is reduced sensitivity to fluctuations of external atmospheric pressure.12 cl, 6 dwg |
