Liquid additive dispenser

Claim 1

A liquid proportioning dispenser for precisely fixing the flow rate of an additive charged liquid of variable viscosity into the flow line of a carrier liquid having substantially uniform viscosity and including; a closed vessel storing the first mentioned liquid, a positive pressure port exposed into a high upstream pressure of the first mentioned flow line, a negative pressure port exposed into a low downstream pressure of the first mentioned flow line, a tubular liquid pressure displacement connection from the positive pressure port and into the closed vessel, and a tubular liquid pressure delivery connection into the negative pressure port and opening from the additive charged liquid stored in the closed vessel, there being a flow restrictor in the form of a pourous body pressed into the body of a coupling joining sections of the tubular liquid pressure displacement connection which oppose and position the said porous body plugging the said positive pressure port and connection therefrom into said closed vessel, whereby the differential between upstream and downstream pressures determines the flow rate of upstream carrier liquid of substantially uniform viscosity through said flow restrictor and displaces stored additive charged liquid to be subsequently dispensed into the downstream liquid at a substantially uniform slow flow rate.