Roof ventilator having fluid flow control and method of making s

Details Roof ventilator having fluid flow control and method of making s Roof ventilator having fluid flow control and method of making s

1984-02-01

1985-09-03

Joyce, Harold

Fluid handling

Flow affected by fluid contact, energy field or coanda effect

Means to regulate or vary operation of device

98119, 137852, 137854, F24F 700

Patent

active

045385084

ABSTRACT:
A ventilator device for allowing escape of air from enclosed spaces such as a building includes a unitary housing provided with an insert for controlling the flow of fluid therethrough. The insert comprises a pair of insulative, tubular sleeves between which there is sandwiched a flow control valve. The valve may include a fabric-like foraminous membrane which permits passage of moisture laden air outwardly through the ventilator but prevents moisture in the form of liquid or droplets from returning into the building through the ventilator. Alternatively, the valve may comprise a flexible member which deflects in response to a pressure differential within the housing to allow rapid escape of air from the roof to the surrounding environment.

REFERENCES:
patent: 2833229 (1958-05-01), Donegan
patent: 3228418 (1966-01-01), Rosback et al.
patent: 3472150 (1969-10-01), Strawsine
patent: 4432273 (1984-02-01), Devitt

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