Cryoadsorption pumps having panels with zeolite plates

Details Cryoadsorption pumps having panels with zeolite plates Cryoadsorption pumps having panels with zeolite plates

1980-10-06

1982-04-20

Capossela, Ronald C.

Refrigeration

Low pressure cold trap process and apparatus

55269, 62268, 165133, 417901, B01D 800

Patent

active

043252206

ABSTRACT:
An improved cryopump has cryopanels with pressed zeolite plates mounted thereon. The plates are maintained in intimate but unbonded contact with the panels by use of spring-type mechanisms. Older style panels have clay-bonded zeolite casts attached to their surfaces. The new configuration allows relative expansion and contraction between the zeolite plates and the panels, thereby improving durability of the zeolite. The resilient attachments assure that intimate contact and consequent good cooling of the zeolite adsorptive surface will be maintained during operation of the pump. The zeolite panels are desirably less than about 8 mm thick and are made by isostatic compaction of powders having pore sizes in the range of 2-25.times.10.sup.-10 m.

REFERENCES:
patent: 3390536 (1968-07-01), Kreisman

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