Scroll pump
AssigneeEdwards Limited
InventorNigel Paul Schofield
Life of this patent
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Abstract
The present invention provides a scroll pump comprising: a scroll mechanism having an orbiting scroll and a fixed scroll; a drive shaft having a concentric shaft portion and an eccentric shaft portion connected to the orbiting scroll. The shaft is arranged to be driven by a motor so that rotation of the shaft imparts an orbiting motion to the orbiting scroll relative to the fixed scroll for pumping fluid along a flow path from an inlet to an outlet of the scroll mechanism. An axial lip seal is located between the orbiting scroll and the fixed scroll for resisting leakage of fluid from outside the scroll mechanism into the flow path.
Claims21
A scroll pump comprising:
- a scroll mechanism comprising an orbiting scroll and a fixed scroll;
- and
- a drive shaft comprising a concentric shaft portion and an eccentric shaft portion connected to the orbiting scroll, the drive shaft being arranged to be driven by a motor so that rotation of the drive shaft imparts an orbiting motion to the orbiting scroll relative to the fixed scroll for pumping fluid along a flow path from an inlet to an outlet of the scroll mechanism, wherein an axial lip seal is located between the orbiting scroll and the fixed scroll for resisting leakage of fluid from outside the scroll mechanism into the flow path.
Dependencies are inferred from the claim text.