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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

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.

대표청구항 ▼

A crypogenic pump of the type operated with a two-stage refrigerator, said pump comprising the following: a first refrigerator stage having pump surfaces including an enclosure with an upper opening, said first stage further including a plurality of baffle strips adjacent said opening; a second refr

A crypogenic pump of the type operated with a two-stage refrigerator, said pump comprising the following: a first refrigerator stage having pump surfaces including an enclosure with an upper opening, said first stage further including a plurality of baffle strips adjacent said opening; a second refrigerator stage, disposed inside said enclosure, having pump surfaces including a plurality of plates having surfaces at least partially covered with adsorption material, said plates being disposed in registry in a generally parallelepipedal configuration having a longitudinal dimension extending generally parallel to said baffle strips; each of said plates of said second stage including a generally rectangular planar surface bounded by a pair of bevels extending angularly from opposite longitudinal edges of the respective planar surface, and said planar surfaces of said plates being generally spaced parallel to one another so that said bevels in combination form means for agglomerating condensible gases and for shielding aid planar surfaces from said condensible gages.