Patent ID: 8336737

Claim:
A foam dispenser comprising a pump assembly to be mounted on or in an opening of a reservoir for holding a liquid to be dispensed in the form of a foam, said pump assembly comprising a liquid pump for pumping liquid from said reservoir, an air pump for pumping air and a common actuation part to simultaneously actuate said liquid pump and said air pump, wherein said pump assembly comprises a dispensing channel having a dispensing opening, wherein liquid and air being pumped upon actuation of said common actuation part are mixed to form a foam which is dispensed through said dispensing channel, wherein the pump assembly further comprises a porous matrix which contains a dispensate material, a contact surface of said porous matrix being arranged in communication with said dispensing channel, so that foam being formed in said pump assembly and dispensed through said dispensing channel comes into contact with said contact surface to introduce dispensate material released from said porous matrix in said foam; wherein the dispensing channel comprises a substantially vertical part and a substantially horizontal part, wherein one end of the substantially horizontal part is connected to a top end of the substantially vertical part and the dispensing opening is arranged at an opposed end of the mainly horizontal part; and wherein said contact surface of said porous matrix is only arranged at a top of the substantially horizontal part of said dispensing channel, so that the contact surface will no longer be in contact with the foam or liquid when the foam present in the dispensing channel after dispensing an amount of foam returns to the liquid state in a period wherein no foam is dispensed from the foam dispenser.