Foam dispensing pump container

Details Foam dispensing pump container Foam dispensing pump container

B - Operations, Transporting

05

B

B05B 11/02 (2006.01) A47K 5/12 (2006.01) B05B 7/00 (2006.01) B05B 11/00 (2006.01) B65D 47/34 (2006.01) B65D 83/76 (2006.01)

Patent

CA 2117054

A foam dispensing pump container, for dispensing foam by mixing air pumped from an air cylinder by an air piston having suction holes in its upper wall and a foamable liquid pumped from a liquid cylinder by a liquid piston having an annular projection on its outer wall, provided with an elastic valve member including a cylindrical wall portion, an outer thin annular valve portion extending outwardly from the cylindrical wall portion, and an inner thin annular valve portion extending inwardly from the cylindrical wall portion. The elastic valve member is arranged such that the cylindrical wall portion is in contact at least partially with an inner surface of the upper wall between the suction holes and an air passage, the outer thin annular valve portion is in contact, at its outer annular rim portion, with an inner surface of the upper wall extending outwardly beyond the suction holes, and the inner thin annular valve portion is in contact, at its inner annular rim portion, with the annular projection of the liquid piston below the air passage.

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