Vacuum pre-loaded pneumatic bearing with onboard vacuum...

Details Vacuum pre-loaded pneumatic bearing with onboard vacuum... Vacuum pre-loaded pneumatic bearing with onboard vacuum...

2007-11-06

2007-11-06

Footland, Lenard A. (Department: 3682)

Bearings

Linear bearing

Fluid bearing

Reexamination Certificate

active

11182193

ABSTRACT:
A pneumatic bearing for supporting a payload is disclosed. The pneumatic bearing comprises a bearing body having an active surface divided into a lift portion and a pre-load portion. A plurality of gas distribution channels are formed in the bearing body, wherein a first channel receives a compressed gas, a second channel supplies a vacuum to the pre-load portion of the active surface, and a third channel supplies a positive pressure gas to the lift portion of the active surface. The bearing body has an integral, pneumatically powered, vacuum generator having an inlet coupled to the first channel, a vacuum aperture coupled to the second channel, and an exhaust. The compressed gas may be supplied to the lift portion of the active surface either in parallel, in series, or in a series-parallel configuration, with the integrated vacuum generator. In an embodiment, the pneumatic bearing is reconfigurable.

REFERENCES:
patent: 5839324 (1998-11-01), Hara
patent: 2004/0161179 (2004-08-01), Zywno
patent: 2005/0129339 (2005-06-01), Sai et al.

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