Diffusion pump

Details Diffusion pump Diffusion pump

1991-04-15

1992-08-11

Bertsch, Richard A.

Pumps

One fluid pumped by contact or entrainment with another

Jet

417153, 417154, F04F 900

Patent

active

051374293

ABSTRACT:
A high vacua diffusion pump for use in a vacuum system including a chamber to be evacuated and a positive displacement pump. The diffusion pump includes a pump body structure having an open upper end and a closed lower end. A boiler and jet assembly is yieldably supported within the pump body and produces jet streams that impel the residual air molecules through the exit port. A ceramic heat break having a labyrinth passage therethrough positively separates the temperature of the condensing wall surface from the boiler temperature. A cooling system permits selective rapid cooling of the boiler and is openable to permit rapid re-heating of the boiler. In one embodiment, the pump includes a room temperature condensing surface, and in another embodiment a non-room temperature condensing surface is provided.

REFERENCES:
patent: 1822702 (1931-09-01), Kobel
patent: 2386298 (1945-10-01), Downing et al.
patent: 2931561 (1960-04-01), Hiesinger
patent: 3224665 (1965-12-01), Milleron et al.
patent: 3391857 (1968-07-01), Lucas et al.
patent: 3941512 (1976-03-01), Albertin

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