초록 ▼

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 mositure therethrough. The insulator includes a pair of insulative, tubular members between which there is sandwiched a fabric-like fo

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 mositure therethrough. The insulator includes a pair of insulative, tubular members between which there is sandwiched 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.

대표청구항 ▼

A roof ventilator, comprising: an elongate, essentially hollow tube having a longitudinal passageway therein through which air may flow; a structurally self supporting, thermally insulative sleeve of foamed synthetic material lining at least a portion of the interior wall of said tube within said pa

A roof ventilator, comprising: an elongate, essentially hollow tube having a longitudinal passageway therein through which air may flow; a structurally self supporting, thermally insulative sleeve of foamed synthetic material lining at least a portion of the interior wall of said tube within said passageway, said sleeve including an inside wall exposed to and defining and air space within said passageway which is thermally insulated from said interior wall; and a generally planar, foraminous member for controlling the flow of moisture in one direction through said passageway, said foraminous member being secured to said sleeve and extending across said air space, whereby all of the air flowing through said passageway passes through said foraminous member.