Damper

Details Damper Damper

1986-03-03

1988-12-13

Joyce, Harold

Fluid handling

Flow affected by fluid contact, energy field or coanda effect

Means to regulate or vary operation of device

49 40, 49109, 98 4219, 98 85, 137870, F24F 702, F24F 1310

Patent

active

047902370

ABSTRACT:
A damper for use in controlling the flow rate or direction of a flow of air or fumes flowing out from a room or space or flowing through a ventilation system, including a housing having at least one inlet opening. The housing has a tubular side wall in which are provided a plurality of outlet apertures opened and closed by associated closure members which are adapted to swing to and away from the side wall, preferable inwardly of the housing. The total flow area of the outlet apertures may be extended to a desired degree by increasing the axial length and diameter of the side wall of the housing, whereby the flow resistance and pressure drop across the damper are reduced.

REFERENCES:
patent: 902509 (1908-10-01), Speer
patent: 1291184 (1919-01-01), Schulz
patent: 1630978 (1927-05-01), Sobel
patent: 1695064 (1928-12-01), Schnoor
patent: 1921652 (1933-08-01), Bohnert
patent: 2203444 (1940-06-01), Schilling
patent: 2319178 (1943-05-01), Wrona
patent: 2329468 (1943-09-01), Hardgrove
patent: 2719475 (1955-10-01), Royall
patent: 3198235 (1965-08-01), Maskell
patent: 4397225 (1983-08-01), Patton

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