Device for maintaining a vacuum in a thermally insulating jacket

Details Device for maintaining a vacuum in a thermally insulating jacket Device for maintaining a vacuum in a thermally insulating jacket

1996-03-21

1997-02-11

Kilner, Christopher

Refrigeration

Storage of solidified or liquified gas

With sorbing or mixing

67 451, F17C 308

Patent

active

056009577

ABSTRACT:
A device for maintaining a vacuum in a thermally insulating jacket is described. The device comprises a container formed of a gas-tight material, preferably aluminum, which has an opening to the atmosphere. Inside the container is a first pellet comprising a powder of a Ba-Li alloy getter material. Arranged above, and completely covering, the first pellet is a second pellet comprising a powder of a drying material, optionally including the oxide of a noble metal and a material to prevent contraction of the drier. A process for manufacturing such a device is also described in which the first pellet is obtained by compression of its constituent powders at a pressure between about 30 bar and 1000 bar.

REFERENCES:
patent: 5012102 (1991-04-01), Gowlett
patent: 5191980 (1993-03-01), Boffito et al.
patent: 5312606 (1994-05-01), Boffito et al.
patent: 5365742 (1994-11-01), Boffito et al.
patent: 5375423 (1994-12-01), Delatte
patent: 5408832 (1995-04-01), Boffito et al.

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