Pumps – One fluid pumped by contact or entrainment with another – Jet
Patent
1975-02-26
1979-06-19
Croyle, Carlton R.
Pumps
One fluid pumped by contact or entrainment with another
Jet
F04F 522
Patent
active
041585283
ABSTRACT:
There is disclosed a unitary vacuum transducer or pump capable of obtaining a high degree of vacuum using standard shop compressed air fed to a single inlet in the transducer from a single source of compressed air, each venturi tube having compressed air supply means associated with said inlet and terminating in a jet-producing nozzle. The transducer comprises two or more venturi tubes arranged in series with the entrance section of one venturi tube being connected to the exit section of another smaller venturi tube the entrance section of which is connected to the exit section of a yet smaller venturi tube or to the orifice of a vessel containing air or other gas to be rarefied. Compressed air or other gas is supplied at a uniform pressure to the single inlet of the transducer for distribution at a single uniform pressure to the compressed air supply means of each of the venturi tubes to provide a unitary transducer which is capable of producing degrees of vacuum and rates of vacuum flow substantially greater than those now obtainable with standard shop compressed air ranging from 60 psi to 120 psi.
REFERENCES:
patent: 1152302 (1915-08-01), Davenport
patent: 1406145 (1922-02-01), Blauhorn
patent: 1879366 (1932-09-01), Lorraine
Elements of Gasdynamics, by Liepmann and Roshko, John Wiley & Sons, Inc., N.Y., 1957, pp. 127 and 129.
DuHaime Raymond A.
Lasto Clifford S.
Air-Vac Engineering Co., Inc.
Croyle Carlton R.
Look Edward
Tully Thomas L.
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