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US 9,739,278 B2Granted
Multi-stage vacuum pump
AssigneeEdwards Limited
InventorsAlan Ernest Kinnaird Holbrook, Sivabalan Kailasam, Ross Gordon Eadie
Life of this patent
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Abstract
A multi-stage vacuum pump may include a sealing arrangement for sealing between the stator components of the pump. The end seals of the arrangement comprise an annular portion for sealing between end stator components and shell components and axial portions which extend from the annular portion and together with separate axial seals seal between the shell components.
Claims23
A multi-stage vacuum pump comprising:
- first and second shell stator components arranged to be assembled together along respective axially extending surfaces to define a plurality of pumping chambers along an axis of the pump;
- first and second end stator components arranged to be assembled at respective axial ends of the shell stator components;
- axial seals for sealing between respective axially extending surfaces of the shell stator components;
- and
- end seals having annular portions for sealing between respective first and second end stator components and the shell stator components and axial portions which extend in an axial dimension from the annular portions between the shell stator components for sealing between respective axially extending surfaces of the shell stator components, wherein the end seals are separate from the axial seals.
2 more elements
A stator comprising:
- first and second shell stator components arranged to be assembled together along respective axially extending surfaces to define a plurality of pumping chambers along an axis of the pump;
- first and second end stator components arranged to be assembled at respective axial ends of the shell stator components;
- axial seals for sealing between respective axially extending surfaces of the shell stator components;
- and
- end seals having annular portions for sealing between respective first and second end stator components and the shell stator components and axial portions which extend in an axial dimension from the annular portions between the shell stator components for sealing between respective axially extending surfaces of the shell stator components, wherein the end seals are separate from the axial seals.
2 more elements
Dependencies are inferred from the claim text.