Cryogenic pump operated with a two-stage refrigerator

Details Cryogenic pump operated with a two-stage refrigerator Cryogenic pump operated with a two-stage refrigerator

1990-02-27

1991-03-19

Capossela, Ronald C.

Refrigeration

Low pressure cold trap process and apparatus

55269, 417901, B01D 800

Patent

active

050000071

ABSTRACT:
A cryogenic pump of the type operated with a two-stage refrigerator. A first refrigerator stage includes a plurality of first-stage pump surfaces, and a second refrigerator stage includes a plurality of second stage pump surfaces. The second-stage pump surfaces include a plurality of plates arranged parallel to one another to form a generally cuboid configuration. Each of the plates has a generally rectangular planar surface bounded by a pair of bevels extending angularly from opposite longitudinal edges of the planar surface. The plates are spaced a predetermined distance away from one another, and the bevels have a predetermined width that is equal to or greater than the distance between the plates. The plates are at least partially covered with an adsorption material. In a further embodiment, the plates may include first and second bevel sections.

REFERENCES:
patent: 4212170 (1980-07-01), Winkler
patent: 4295338 (1981-10-01), Welch
patent: 4546613 (1985-10-01), Eacobacci et al.
patent: 4555907 (1985-12-01), Bartlett
patent: 4718241 (1988-01-01), Lessard et al.
patent: 4873833 (1989-10-01), Pfeiffer et al.

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