Patent ID: 6257455
Filing Date: 2001-07-10
Classification: B05B

Abstract:
A pump dispenser comprising:1) an inverted cup-shaped cylinder, a piston operatively disposed in the cylinder, the piston having a downward inlet tube;2) a support portion for the cylinder having a lower end;3) a spool-like retainer having an axis, an upper end secured to the lower end of the support portion, the retainer having a central sleeve receiving the inlet tube in sliding relation, the retainer having an annular trough concentric with the axis of the retainer, the trough having an annular radial wall and formed with a plurality of passages through the retainer positioned at spaced points about the axis and terminating in ends in the radial wall,4) a container closure disposed about the lower end of the retainer, and5) a flat annular laminate of gas-permeable, liquid-impermeable material disposed concentrically in the annular trough and to the radial wall over the ends of the passages.