Patent ID: 8579159
Filing Date: 2013-11-12
Classification: A47K,B05B

Abstract:
1. A foam dispenser, comprising: a container holding a foamable liquid for dispensing; a pump body; a substantially straight passage extending through said pump body from an inlet to an outlet thereof, said inlet receiving foamable liquid from said container; an inlet valve including an inlet flow regulator and an outlet valve including an outlet flow regulator, the inlet valve and outlet valve being positioned in said substantially straight passage such that said inlet flow regulator and said outlet flow regulator define: an inlet stage from said inlet to said inlet flow regulator, an outlet stage from said outlet flow regulator to said outlet, and a transition stage from said inlet flow regulator to said outlet flow regulator; a spacer positioned in said substantially straight passage between said outlet valve and said outlet; a liquid bellows sealed to an exterior of said pump body and defining a liquid chamber, said liquid bellows being movable between an expanded volume and a contracted volume and adapted to expel at least a portion of a liquid within the liquid chamber when moved from said expanded volume to said contracted volume; a liquid port extending through said pump body and communicating with said transition stage and said liquid chamber; an air bellows sealed to said exterior of said pump body and defining an air chamber, said air bellows being movable between an expanded volume and a contracted volume and adapted to expel at least a portion of a volume of air within the air chamber when moved from said expanded volume to said contracted volume; and an air port extending through said pump body and communicating with said outlet stage and said air chamber.