Patent ID: 8939451
Filing Date: 2015-01-27
Classification: F16J

Abstract:
1. An apparatus for moving a payload within a process chamber, comprising: a shaft passing through an aperture in a wall of the process chamber; a mechanical contact bearing to support the shaft, disposed outside the process chamber; a fixed seal housing, having a first central opening through which the shaft passes, an upper surface affixed to an outer surface of the wall, and a lower surface; a floating seal cartridge, having a second central opening through which the shaft passes, an upper surface disposed proximate to the lower surface of the fixed seal housing wherein the space therebetween defines an interface, and a lower surface, the floating seal cartridge comprising wherein a first air bearing is created between the floating seal cartridge and the fixed seal housing at the interface and a second air bearing is created between the floating seal cartridge and the shaft at the second central opening.