Method and apparatus for controlling volume air flow

Details Method and apparatus for controlling volume air flow Method and apparatus for controlling volume air flow

1975-09-04

1977-08-16

Wayner, William E.

Automatic temperature and humidity regulation

Ventilator type

137486, 236 80R, F24F 704

Patent

active

040421732

ABSTRACT:
A butterfly damper, controlling volume air flow through a duct, is biased toward a closed position at least partially by aerodynamic pressure and is moved against its bias by a small pneumatic actuator in response to a sensed condition. The position of the damper is stabilized by a feedback and oscillations are damped.

REFERENCES:
patent: 3081847 (1963-03-01), Smitley
patent: 3361157 (1968-01-01), Schach
patent: 3719321 (1973-03-01), McNabney
patent: 3779275 (1973-12-01), Ley et al.
patent: 3809314 (1974-05-01), Engelke et al.
patent: 3941310 (1976-03-01), Travaglio et al.
patent: 3945565 (1976-03-01), Lynch et al.

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