Airflow regulator

Details Airflow regulator Airflow regulator

1992-11-19

1994-09-20

Nilson, Robert G.

Pumps

Processes

Of pumping one fluid by contact or entrainment with another

137499, 417189, F04F 548

Patent

active

053484495

ABSTRACT:
A passive aspirator based on the Venturi effect has a pivotable flap in the inlet portion of a first air passage. The flap reduces the air flow through the passage when high pressure is present. A spring biases the flap toward an open position. Increasing air flow overcomes the spring force and tends to close the flap. This variable-volume flow allows use of a large enough passage to aspirate sufficient air at low flow rates but does not produce excess waste air at high flow rates.

REFERENCES:
patent: 702005 (1902-06-01), Horenz
patent: 947166 (1910-01-01), Smith
patent: 1437015 (1922-11-01), Qualman
patent: 1459961 (1923-06-01), Wheeler
patent: 1751820 (1930-03-01), Knudson
patent: 3981326 (1976-09-01), Gorchev
patent: 4523609 (1985-06-01), Weck

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