Ventilating apparatus for heat transfer systems

Details Ventilating apparatus for heat transfer systems Ventilating apparatus for heat transfer systems

1974-05-13

1976-09-28

Cline, William R.

Fluid handling

Line condition change responsive valves

Direct response valves

251338, F16K 1500

Patent

active

039825604

ABSTRACT:
Apparatus for introducing fresh, outside air to a forced air heating or cooling system of buildings comprising a conduit for conducting fresh air to the system, a damper movably mounted in the conduit for adjusting the flow of fresh air therein, and a counterweight adjustably mounted on the damper inside the conduit for movement to selected counterbalancing positions.

REFERENCES:
patent: 987946 (1911-03-01), Bergler
patent: 1082174 (1913-12-01), Rutherford
patent: 1092275 (1914-04-01), Long
patent: 1162239 (1915-11-01), Johnsgaard
patent: 2431827 (1947-12-01), Rado
patent: 2624513 (1953-01-01), Field
patent: 2652200 (1953-09-01), Field
patent: 2806653 (1957-09-01), Ziph
patent: 2840317 (1958-06-01), Kozak

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