FR2728632A1 - Process for propulsion of fluid by external fluid source - Google Patents

Abstract

The process to drive a fluid by pressure, using the pressure of an other fluid such as that from a water distribution system consists of a sealed chamber (1) containing a supple membrane or a piston (2) which divides the chamber into two sealed compartments the driven (3) and the driver (4). The deformation of the membrane or the movement of the piston (2) transfers the pressure of the driver (4) to that of the driven without either fluid coming in contact with each other.

Description

The Dresente invention relates to a process for the propulsion of fluids (the fluid to be propelled), orocedé using the oression of a fluid available under pressure the propellant fluid), such as running water from the distribution network.

An illustrative example of this process is the use of tap water pressure as a power source in garden sprayers.

The usual method uses as a propellant the pressure of a piston pushed manually or mechanically by a motor member. or the pressure of a gas in contact with the product to be propelled, gas delivered by a reserve under pressure or obtained by manual or mechanical compression.

The procedure according to the invention uses instead of a gas or a piston moved mechanically. a propellant whose pressure is readily available. like running water from public networks.

The two elements present, propellant fluid and propellant fluid are contained in separate chambers, the assembly being contained in an inextensible enclosure. The separation, waterproof. is ensured by a flexible membrane or a piston whose deformation, in the case of the membrane, or displacement in the case of the piston, allows the transmission of the pressure from the propellant to the fluid to be propelled.

Figure I shows in section the method according to the invention, with the use of a flexible membrane.

Figure 2 shows in section a variant of this process, using a piston.

Both figures are only illustrations of the process.

Other variants can be designed using the same principle: the use of the existing pressure of a fluid and readily available element, to move another element.

Referring to the drawing in Figure (1) the method comprises an enclosure <i) in which a flexible membrane (2) separates two chambers. The arrival (3ì of the propellant fluid and the departure (4) of the fluid to be propelled are carried out according to usual methods: by a connection pipe for example on one side and by a spray gun for example in the other.

Referring to Figure (2), the separation of the 2 chambers is ensured by a piston (2) whose displacement ensures the transfer of pressure, the other elements being of the same nature aue those of Figure <1).

The method is according to the invention particularly intended, but not exclusively, for spraying liquid products used in agricultural work, or for spraying coatings such as paint.

Claims (2)

 pressure, like running water from a public distribution network.  propellant) physically separate, usually available under  using, for this 4aire, the pressure of another fluid (the fluid  1 Method for propelling a fluid (the fluid to be propelled) by pressure, 2. Method according to claim (1) characterized in that it uses a  flexible membrane or a tight piston to ensure the transfer of  pressure of the propellant to the fluid to be propelled and avoid any  direct contact between the two fluids.