US Patent 9855537 Impeller assemblies for fluid processing systems

A fluid mixing system includes a flexible bag having an interior surface bounding a compartment. An elongated first tubular connector is disposed within the compartment of the flexible bag, the first tubular connector having a first end and an opposing second end, the first end of the first tubular connector being coupled with the flexible bag. An elongated second tubular connector is disposed within the compartment of the flexible bag, the second tubular connector being more rigid than the first tubular connector and having a first end coupled to the second end of the first tubular connector. A plurality of impeller are disposed on the elongated second tubular connector at spaced apart locations.