| 主权项 |
1. A tandem pump comprising:
a pump housing defining a first pump portion having a first pump inlet and first pump outlet, a second pump portion having a second pump inlet and a second pump outlet; a common shaft rotatably positioned in said pump housing and extending between said first pump portion and said second pump portion; a first pump chamber of said first pump portion having a first pump element with a first pump outer rotor surrounding a first pump inner rotor, wherein said first pump inner rotor is connected to a first end of said common shaft; a second pump chamber of said second pump portion having a second pump element operationally connected to a second end of the common shaft, opposite the first end of the common shaft; and a stator contained in said first pump portion of said pump housing circumscribing said first pump outer rotor, wherein said stator and said first pump outer rotor are magnetically coupled so that energization of said stator causes said first pump outer rotor to rotate and pump a first fluid through said first pump chamber between said first pump inlet and said first pump outlet, and rotation of said first pump outer rotor causes rotation of said first pump inner rotor that is translated to said second pump element through said common shaft, wherein said second pump element rotates causing a second fluid to pump through said second pump chamber between said second pump inlet and said second pump outlet. |
