Patent ID: 8157131

Claim:
A refill assembly comprising: a bottle defining an internal reservoir and an opening which communicates with the reservoir, the opening being defined by a rim of the bottle; a pumping mechanism configured to be cooperatively engageable with the bottle; and a refill cartridge cooperatively engaged to the bottle, the refill cartridge including: a cartridge body having a flange portion abutted against the rim, the cartridge body defining a cartridge reservoir having a concentrated chemical agent stored therein, the cartridge body including a tubular projection defining an opening which fluidly communicates with the cartridge reservoir; a plug cooperatively engaged to the cartridge body and selectively movable from a sealing position to a dispensing position relative thereto, the movement of the plug from the sealing position to the dispensing position facilitating the flow of the chemical agent from the cartridge reservoir into the reservoir of the bottle; and a cap connected to the cartridge body and including a tubular boss defining a flow passage which fluidly communicates with the cartridge reservoir, the cartridge reservoir being collectively defined by the cartridge body, the plug and the cap; wherein the plug is frictionally engaged to the boss and protrudes from the cap, and is further frictionally engaged to the projection of the cartridge body, the application of pressure to that portion of the plug protruding from the cap facilitating the movement thereof from the sealing position to the dispensing position, with the movement of the plug to the dispensing position facilitating the formation of a fluid flow path between the projection and a portion of the plug; wherein the refill cartridge is configured to reside within the internal reservoir with the plug in the scaling position when the pumping mechanism is engaged with the bottle.