Pump device with collapsible pump chamber having supply container venting system and integral shipping seal

A manually operated dispensing pump device for pumping a liquid from a supply container and discharging the liquid through a discharge orifice comprising:

• (a) a housing for sealingly mounting the dispensing pump device onto the supply container, the housing including a portion of a liquid passage providing fluid communication from the supply container downstream to the discharge orifice;
• (b) an inlet valve located within the liquid passage, the inlet valve being opened to permit liquid flow therethrough during periods of negative downstream pressure;
• (c) an outlet valve located within the liquid passage, the outlet valve being open to permit liquid flow therethrough during periods of positive upstream pressure and being closed during periods of negative upstream pressure;
• (d) a shipping seal including two functional elements which cooperate when in a opened position to permit liquid flow through the liquid passage and cooperate once the upper housing and the lower housing are rotated relative to each other to an open position to permit liquid flow through the liquid passage;
• and
• (e) a collapsible pump chamber defining a portion of the liquid passage downstream of the inlet valve and upstream of the outlet valve, the collapsible pump chamber including one of the functional elements of the shipping seal as an integral component thereof such that the collapsible pump chamber and said one of the functional elements of the shipping seal is a single unitary part.

A supply container venting system for a dispensing pump, said venting system operated by two different means and comprising:

• a) a dispensing pump having a lower housing for sealingly mounting said dispensing pump onto a supply container, said lower housing having an interior surface;
• said lower housing also having a vent opening therethrough internal to said interior surface and in fluid communication with said supply container;
• b) an upper housing telescopingly engaged with said lower housing and acting as a pump actuator, said upper housing having at least one lug;
• c) a pump chamber having a resilient annular flange angled downward therefrom, said annular flange sized to press against said interior surface of said lower housing to seal said vent opening from communication with ambient air and moisture, said annular flange remaining in contact with said interior surface until either a vacuum generated in said supply container by pumping fluid therefrom deflects said flange away from said interior surface or said at least one lug contacts and deflects said annular flange when said upper housing is actuated downward.