Pressure-distributed fluid preservation system - has pump generating increasing vacuum in vessel and preventing air inflow

摘要

The preservation system is for fluids to be distributed under pressure, particularly perfume. The fluid is enclosed in a vessel under a pressure at the most equal to atmospheric, the vessel being sealed by means of a suction and pressure pump acting in one direction and allowing no air flow in the reverse direction into it. As the pump distributes the fluid, an increasing vacuum is generated inside the vesel. The pump (3) can have an immersion feed pipe (10) with its mouth at the bottom of the vessel (4). The internal volume of the pipe is at the most equal to half the working volume of the pump.