SQUEEZE OPERATED FOAM DISPENSER

摘要

A foam dispenser (10) for use in association with foaming liquid is disclosed. The squeeze operated foam dispenser includes a resiliently deformable bottle (12) and a cap (14). The resiliently deformable bottle has an at rest position and an under pressure position. The bottle has an interior and a throat. The cap is attached to the throat and the cap has a nozzle (20) extending inwardly into the interior of the bottle. The nozzle defines a nozzle fluid passageway. A nozzle cover (24) is attached to the cap and spaced from the nozzle and a cap chamber (26) is defined therebetween. An air tube (30) defining an air passageway extends inwardly from the nozzle cover and the air passageway is in communication with the cap chamber and an interior portion of air formed between the liquid and the bottle (34) in the interior thereof when the nozzle is positioned downwardly. A pressure actuated valve (38) selectively opens and closes the air tube (32) whereby the valve (38) is closed when the bottle is in the at rest position and opens responsive to the bottle being moved from the at rest position to the pressure position. A cover port (28) is formed in the nozzle cover to provide a fluid passageway between the interior and the cap chamber. The dispenser (10) includes a method of sealing the nozzle when the bottle is in the at rest position. The sealing method may be a pressure retaining valve. Alternatively the cover port, the nozzle and the nozzle cover are arranged whereby, in the at rest position with the throat of the bottle positioned downwardly, there is an airlock between the nozzle and nozzle cover in the cap chamber and when the bottle is moved from the at rest position to the pressure position the air lock is broken.