Pumps – By heating of pumped fluid
Patent
1997-04-01
1998-09-22
Thorpe, Timothy
Pumps
By heating of pumped fluid
F04B 19204
Patent
active
058105646
ABSTRACT:
An apparatus and method for evacuating gas from a chamber to reduce the pressure therein utilizes a housing having a lower, downwardly facing wall and an upper, upwardly facing wall, a first gas flow director of truncated conical shape having a larger end facing downwardly and a smaller end facing upwardly and disposed within the housing coupled to the lower wall. A plurality of stationary vanes is disposed adjacent the smaller end of the first gas flow director, for imparting a vortex flow to gas flowing therethrough. A second gas flow director of truncated conical shape and having a larger end facing downwardly and disposed within the housing and a smaller end facing upwardly is coupled to the upper wall, the surface of the second gas flow director within the housing including a plurality of longitudinal slits, each slit including outer and inner guide flaps to guide the flow of gas through the slit. The larger end of the second gas flow director is closed and gas deflected towards the slits, and the gas is heated within the second gas director to increase the flow of gas. Gas flows upwardly through the first gas flow director, the slits and the second gas flow director to an outlet.
REFERENCES:
patent: 2343665 (1944-03-01), Hickman
patent: 2379151 (1945-06-01), Hickman
Thorpe Timothy
Tyler Cheryl J.
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