Patent ID: 6929193

Claim:
A foam-in-place dispenser through which foamable compositions are dispensed, said dispenser comprising: a housing having a discharge end; a valving rod disposed within said housing and being movable therein to control the flow of the foamable compositions through the dispenser; and a tip mounted at the discharge end of said housing and comprising: a body formed of a material that is porous to gases and liquids, but which is substantially impermeable to the foamable compositions that flow through the dispenser, a bore in said body that provides a channel through which the foamable compositions may flow and also through which an end portion of the valving rod can pass, and at least one face of said body forming a frusto-conical surface directed inwardly toward said body so that when a mixture of cleaning solvent and air is directed through said body, a frothing mixture of air and solvent will exit said frusto-conical surface to provide cleaning action to facilitate the removal of at least a portion of any foamable compositions or derivatives thereof that may be in adherence with said circular face or the end portion of the valving rod, said frusto-conical surface having a major diameter and a minor diameter, said tip further including an outermost rim coincident with or adjacent to said major diameter, wherein, the outermost rim of said tip extends beyond the discharge end of said housing to substantially confine the solvent, foamable composition and derivatives thereof to the porous, frusto-conical face of said tip.