Vacuum producing device

Details Vacuum producing device Vacuum producing device

1976-04-12

1978-02-14

Freeh, William L.

Pumps

One fluid pumped by contact or entrainment with another

Jet

294 64A, 417193, F04F 552

Patent

active

040736024

ABSTRACT:
A vacuum producing device comprises a venturi unit which functions to produce or stop producing a vacuum after predetermined movement of a surrounding sleeve and air shut off member and includes silencing means for substantially reducing the sound of pressure air passing through the device.

REFERENCES:
patent: 284614 (1883-09-01), Colvin
patent: 1032222 (1912-07-01), Locke
patent: 1345639 (1920-07-01), Schmidt
patent: 2381589 (1945-08-01), Hayes
patent: 2767727 (1956-10-01), Acomb
patent: 2975958 (1961-03-01), Kane
patent: 3052479 (1962-09-01), LaTrell
patent: 3568959 (1971-03-01), Blatt

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