초록 ▼

Dispensers for liquids are provided having structure for containing a pool of liquid in the dispenser, to a predetermined level. A discharge chamber contains air above the level of liquid and a discharge device extends upwardly at least partly through the discharge chamber from below the level of th

Dispensers for liquids are provided having structure for containing a pool of liquid in the dispenser, to a predetermined level. A discharge chamber contains air above the level of liquid and a discharge device extends upwardly at least partly through the discharge chamber from below the level of the pool and has an external outlet. The discharge device includes a foamer chamber having a wall defining very small holes located above the pool level, and pressure means is coupled to the discharge chamber and operable to increase the pressure in the discharge chamber so that a pressure applied on the pool level drives liquid into the discharge device. Simultaneously air is forced through the small holes in the foamer chamber to meet the liquid passing through the foamer chamber where progressive foaming takes place before the resulting foam is forced through a discharge outlet.

대표청구항 ▼

[ I claim:] [1.] A dispenser for dispensing liquids, the dispenser having:a receptacle for the liquid;means for containing a pool of liquid to a predetermined level, said means being in communication with the receptacle for replenishing the pool of liquid;a discharge chamber above said level for con

[ I claim:] [1.] A dispenser for dispensing liquids, the dispenser having:a receptacle for the liquid;means for containing a pool of liquid to a predetermined level, said means being in communication with the receptacle for replenishing the pool of liquid;a discharge chamber above said level for containing air above said level;a discharge device having an inlet passage extending upwardly from below said level to convey liquid from said pool, a foamer chamber attached to the inlet passage to receive liquid from the inlet passage, the foamer chamber having a generally cylindrical wall in the foamer chamber defining very small holes located above said predetermined level, the holes perforating the wall circumferentially and being spaced vertically in the wall, and an outlet passage extending from the foamer chamber and having an external outlet through which foam is to be dispensed; andpressure means coupled to the discharge chamber for increasing the pressure in the discharge chamber to drive liquid into the discharge device and simultaneously force air through said holes to meet the liquid in the foamer chamber as the liquid rises through the foamer chamber so that the rising liquid is exposed sequentially to individual streams of air passing through the holes thereby causing progressive foaming of the liquid as the progressively foamed liquid meets more holes in travelling vertically, so that the foaming is enhanced as the progressively foamed liquid passes all of the holes resulting in a completed foam which is driven through the outlet passage and issues through the outlet.