Patent ID: 9353746
Filing Date: 2016-05-31
CPC Classification: F01C,F04C

Claim Text:
1. A vacuum scroll compressor comprising: a dry scroll pumping mechanism comprising: an axially extending drive shaft having an eccentric shaft portion so that rotation of the eccentric shaft portion imparts an orbiting motion to the orbiting scroll relative to the fixed scroll for pumping fluid from the inlet to the outlet of the scroll pumping mechanism for a single stage of the dry scroll pumping mechanism, wherein the first and second axial end portions each include a first sealing arrangement comprising fixed seals fixed in respective channels of the fixed scroll and the orbiting scroll and a second sealing arrangement comprising floating seals received in respective channels of the fixed scroll and the orbiting scroll, the first sealing arrangement and the second sealing arrangement being arranged in series along the respective first and second axial end portion from the inlet to the outlet for sealing between the first axial end portion and the orbiting scroll plate and between the second axial end portion and the fixed scroll plate.