Importance

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Abstract

In an atomizing pump dispenser which includes a pump body having a pump chamber with a piston disposed for reciprocal motion therein for dispensing a fluid from the pump chamber upon depression of a dispensing stem which is operatively coupled to the piston, and in which a valve member operatively coupled to the piston closes off an inlet throat for the chamber during dispensing, the inlet throat being formed by a separate insertable flexible seal, the flexible seal is disposed at the bottom of the pump chamber in such a manner as to be slidable between two positions. In the first position, which the seal assumes when the pump stem is depressed, it abuts against the pump body to prevent communication between the pump chamber and the space below the throat. After the dispensing stroke, as the stem is pushed upward by biasing means and, with it, the valve member, the flexible seal moves to a second position in which a bypass channel is opened permitting fluid to immediately begin refilling the pump chamber from below the throat.

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First Claim