Patent ID: 9307871
Filing Date: 2016-04-12
CPC Classification: A47K,B05B,Y10T

Claim Text:
1. A refill unit comprising: a container for holding a foamable liquid; a pump housing connected to the container; the pump housing including a cavity, a liquid inlet passage and a liquid outlet passage; the liquid inlet passage placing the container in fluid communication with the cavity; the liquid outlet passage placing the cavity in fluid communication with a mixing chamber; a liquid outlet valve located downstream of the liquid outlet passage and upstream of the mixing chamber; a liquid inlet valve located between the container and the cavity; a cylindrical sleeve located at least partially within the cavity; a liquid piston reciprocally movable within the cylindrical sleeve; the cylindrical sleeve forming at least a portion of a liquid pump chamber; an air compressor; an air passageway placing the air compressor in fluid communication with the mixing chamber; an air inlet valve and wherein the liquid outlet valve and the air inlet valve are part of an insert; and an outlet nozzle in fluid communication with the mixing chamber for dispensing a mixture of foamable liquid and air.