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High specific surface area aerogel cryoadsorber for vacuum pumping applications

United States Patent

6,122,920
September 26, 2000
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
A cryogenic pumping system is provided, comprising a vacuum environment, an aerogel sorbent formed from a carbon aerogel disposed within the vacuum environment, and cooling means for cooling the aerogel sorbent sufficiently to adsorb molecules from the vacuum environment onto the aerogel sorbent. Embodiments of the invention include a liquid refrigerant cryosorption pump, a compressed helium cryogenic pump, a cryopanel and a Meissner coil, each of which uses carbon aerogel as a sorbent material.
Hill; Randal M. (Livermore, CA), Fought; Eric R. (Brentwood, CA), Biltoft; Peter J. (Livermore, CA)
The United States of America as represented by the United States (Washington, DC)
09/ 218,034
December 22, 1998
The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-48 between the United States Department of Energy and the University of California.