Patent ID: 11969743
Assignee: nan
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 10:
11. Dispenser system for a pumpable product, comprising a rigid or pliable product container and a dispensing device with a pump apparatus, wherein the pump apparatus comprises at least one first valve group for conveying the product out of the product container, as well as a second valve group for feeding air into the product container, wherein the second valve group defines a feed duct in which at least one filter unit for filtering sterile air is arranged, so that a positive pressure of sterile air is settable in the product container, wherein the pump apparatus is designed as a manually operable double-pump apparatus and comprises a double-piston system for simultaneous conveying of the product and introduction of the sterile air, wherein the second valve group comprises at least two non-return valve units connected one after another in the feed duct, wherein the filter unit or a second filter unit is arranged between a first non-return valve unit and a second non-return valve unit or between the second non-return valve unit and a third non-return valve unit.