FIELD: pump equipment.
SUBSTANCE: invention relates to a non-aerosol foam pump for the use together with a container for non-pressurized liquid and a foaming block. The pump contains a liquid pump assembly and an air pump assembly. The liquid pump assembly contains a liquid chamber providing an internal volume for liquid and a liquid piston with activation delay. The liquid chamber communicates with the container for non-pressurized liquid and the foaming block. The air pump assembly contains an air chamber providing an internal volume for air and communicating with the foaming block. The liquid pump assembly and the air pump assembly have a working stroke and a reverse stroke. During the working stroke, the internal volume for air decreases, and the internal volume for liquid is constant at the initial stage of the working stroke, and at the following stage, it begins to decrease.
EFFECT: technical result is obtaining an improved foam pump.
22 cl, 25 dwg
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