Foam dispenser with a porous foaming element

摘要

A foaming assembly includes a porous foaming element, a liquid chamber and an air chamber. The porous foaming element has an air inlet, a liquid inlet and an outlet. The porous foaming element has at least two zones of different pore sizes. The liquid chamber is in flow communication with the porous foaming element. The liquid chamber has a volume that is movable between an at rest postion to an activation position. The air chamber is in flow communication with the porous foaming element. The air chamber has a volume that is movable between an at rest position to an activation position. Liquid and air are forced into the porous foaming element under pressure wherein they mix to form foam which exits through the outlet. A dispenser may include a foaming assembly and a liquid container.

主权项

1. A foaming assembly comprising;
a porous foaming element filled with porous material and having an air inlet, a liquid inlet spaced and separated from the air inlet, and an outlet at a downstream end, the porous foaming element having an upstream end spaced apart from the downstream end, wherein the porous material fills the porous foaming element from the upstream end to the downstream end, and has at least two zones of different pore sizes between the upstream and downstream ends of the porous foaming element; a liquid chamber in flow communication with the porous foaming element, the liquid chamber having a volume that is movable between an at rest position to an activation position; an air chamber in flow communication with the porous foaming element, the air chamber having a volume that is movable between an at rest position to an activation position; and whereby liquid and air are forced into the porous foaming element under pressure and air from the air inlet and liquid from the liquid inlet mix in the porous foaming element to form foam which exits through the outlet.