Abstract:
Manually operable pump for dispensing atomized liquids, the pump having passageways enabling air to enter the container on which the pump is mounted, when a vacuum forms in the container on dispensing liquid through the pump.
Abstract:
A pump of very simple, low-cost structure include a hollow stem slidable within a cup-shaped body and acting as a compression piston, and a valving element housing an elongate rod movable in the cavity within the stem and provided with a conical collar which is urged by a spring to engage and seal against a conical seat within the stem, so that liquid delivery occurs snapwise when the conical collar disengages the conical seat within the stem.