Fume hood air flow control

Details Fume hood air flow control Fume hood air flow control

1985-01-09

1988-05-03

Joyce, Harold

98 15, B08B 1502

Patent

active

047412577

ABSTRACT:
A control system is provided for providing a constant flow of air through a chamber, such as a fume hood, by measuring the pressure of the air outside of the hood and comparing it with the pressure of the air within the hood and adjusting the flow of air to achieve a constant pressure difference. The system is particularly applicable to fume hoods which have a sash which can be opened or closed or left in intermediate position; the present system will provide a constant air flow through the hood regardless of the sash position.

REFERENCES:
patent: 3111077 (1963-11-01), Cortright
patent: 3951336 (1976-04-01), Miller et al.
patent: 4113175 (1978-09-01), Sutton, Jr.
patent: 4160407 (1979-07-01), Duym
patent: 4215627 (1980-08-01), Garriss
patent: 4261256 (1981-04-01), Joret

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