초록 ▼

The present invention relates to valves for pressurized containers used for atomizing products such as alcoholic or aqueous lotions, such as, pharmaceutical products. According to the invention, a caliber reducer (7) is disposed at the outer end of the discharge tube (3). By limiting the dischage ra

The present invention relates to valves for pressurized containers used for atomizing products such as alcoholic or aqueous lotions, such as, pharmaceutical products. According to the invention, a caliber reducer (7) is disposed at the outer end of the discharge tube (3). By limiting the dischage rate it is possible to prevent the formation of an undivided jet or solid discharge stream and to control the atomization process when pressure is removed from the button.

대표청구항 ▼

In an aerosol valve for atomizing a liquid having a propulsive gas dissolved therein, and including a cap member adapted to be sealingly secured to a top opening of a pressurized container for the liquid and dissolved gas, a hollow, depressable valve stem slidingly extending upwardly through the cap

In an aerosol valve for atomizing a liquid having a propulsive gas dissolved therein, and including a cap member adapted to be sealingly secured to a top opening of a pressurized container for the liquid and dissolved gas, a hollow, depressable valve stem slidingly extending upwardly through the cap, said valve stem being open at its upper end, closed at its lower end, and having a passageway through a wall thereof communicating with the hollow interior of the stem whereby the liquid and dissolved gas may be charged into or discharged from the container when the valve stem is depressed, and means biasing the valve stem upwardly against the cap member, the improvements characterized by: a. a push-button having a recessed end for removable fit over the upper end of the valve stem, b. a hollow expansion chamber formed within the push-button, opening to the recess and configured to form a continuation of the hollow valve stem when the push-button is mounted thereon, c. a spray nozzle within said push-button, and opening laterally to said hollow expansion chamber, d. an atomizing opening communicating the expansion chamber and the spray nozzle, e. means within the recess face of said push-button for defining a small diameter orifice at the lower end of the expansion chamber, said orifice having a diameter smaller than that of the atomizing opening, serving as the sole means of fluid communication between the hollow valve stem and the expansion chamber, such that said orifice permits continued expansion of the liquid and dissolved gas in the expansion chamber after push-button release and thereby preventing a solid liquid discharge stream, the formation of large liquid droplets, and the overflow of liquid from the spray nozzle when the push-button is released after a discharge operation, and f. a filtEr screen disposed within said recess and overlying and adjacent to and being upstream of said orifice.