Bellows actuated foam dispenser

Claim 1

A foam dispenser comprising: a hollow vertical cylinder having a top disposed horizontal first opening therein and a side disposed second opening therein which extends upward from the bottom of the cylinder to a position adjacent but below the first opening, said cylinder being otherwise sealed; a hollow body integral with said cylinder, the interior of said body communicating via said second opening into the interior of the cylinder to form a common hollow chamber, said body extending outward from the cylinder and having a horizontal top, said top having a horizontal third opening therein, said body being otherwise sealed, said top having a raised elongated horizontal conduit extending between said second opening and said third opening to establish an air passage between said cylinder and said body when the chamber contains liquid to be dispensed and the level of the liquid in the chamber is coincident with said top; first means including manually operable bellows secured and sealed to said first opening; second means including a discharge orifice secured and sealed to said third opening; a vertical dip tube open at both ends and disposed in said body, the top end of the tube being disposed adjacent said third opening, the bottom end of the tube being adjacent but spaced above the bottom of the body; and third means disposed in said third opening above the liquid level, said third means being connected to the top end of the tube and coupled to the second means whereby when the bellows is compressed liquid forced upwardly out of the tube is mixed with air in the third means to produce foam which is discharged through the orifice, ambient air being drawn through said orifice into the chamber to replace the liquid expelled when the compression force on said bellows is released.