Method of and apparatus for controlling the inlet openings of ce

Details Method of and apparatus for controlling the inlet openings of ce Method of and apparatus for controlling the inlet openings of ce

1975-02-04

1976-11-09

Wayner, William E.

Valves and valve actuation

Rotary valves

Ball valve

251 11, F24F 706

Patent

active

039903567

ABSTRACT:
A method of and apparatus for controlling the inlet or exhaust openings of central ventilation or exhaust installations wherein air is only removed from the individual rooms or areas by means of a central exhaust ventilator when such rooms or areas are in use as well as for a certain time duration thereafter, and after expiration of such time duration the exhaust openings of the rooms or areas are automatically closed.

REFERENCES:
patent: 576718 (1897-02-01), Bolton
patent: 3188937 (1965-06-01), Mieczkowski
patent: 3307469 (1967-03-01), Bohanon
patent: 3860169 (1975-01-01), Norman

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