Patent ID: 11878311
Assignee: PNEUMATIC SCALE CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B

Claim 13:
14. The apparatus according to claim 1 and further comprising:
at least one annular air tight seal,
wherein the at least one seal extends in operatively sealing relation between the upper disc shaped portion and at least one annular outer wall that extends radially outwardly of at least one of the feed tube and the centrate discharge tube,
a source of pressurized air, wherein the source of pressurized air is outside the single use structure,
wherein the centrate centripetal pump includes a substantially annular centrate pump opening, wherein centrate passes from the centrate pump chamber through the substantially annular centrate pump opening,
wherein the at least one seal is operative to maintain an air pocket within the interior area, wherein the source of pressurized air is in fluid connection with the air pocket,
wherein the air in the air pocket isolates the at least one seal from the cell culture batch being processed, and wherein the air pocket is positioned radially inwardly of the substantially annular centrate pump opening.