Airflow control mechanism insertable into an air duct

Details Airflow control mechanism insertable into an air duct Airflow control mechanism insertable into an air duct

1979-04-06

1981-03-10

Nilson, Robert G.

Fluid handling

Removable valve head and seat unit

Retained by bonnet or closure

98121A, 137601, F23L 1308

Patent

active

042547954

ABSTRACT:
The invention provides an air flow control mechanism adapted to be slideably insertable into an air duct without substantial structural modification of the air duct and without requiring shut down of the air system.

REFERENCES:
patent: 2397672 (1946-04-01), Leigh
patent: 3123098 (1964-03-01), Bishop
patent: 3282504 (1966-11-01), Foster
patent: 3366141 (1968-01-01), Foster
patent: 3575229 (1971-04-01), Alley
patent: 3715971 (1973-02-01), Moyer
patent: 4076035 (1978-02-01), Frisch

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