초록 ▼

An improved vent for equalizing the pressure on the roof of a building includes a tube provided with a one-way acting valve therein for allowing air to pass from within the building to the open atmosphere but preventing entry of moisture air into the interior of the building. The valve includes a fl

An improved vent for equalizing the pressure on the roof of a building includes a tube provided with a one-way acting valve therein for allowing air to pass from within the building to the open atmosphere but preventing entry of moisture air into the interior of the building. The valve includes a flexible flapper valve member mounted over an opening in a metal plate secured in face-to-face contact with an annular flange on one end of the tube. Condensation of moisture within the tube is prevented by a thin layer of insulation which lines the tube and which, in one embodiment of the invention, includes an integral annular flange sandwiched between the tube and the valve plate to prevent moisture condensation on the plate. An annular depression in the valve plate surrounding the valve opening diverts condensed moisture from the flapper valve to prevent valve seizure due to frozen moisture.

대표청구항 ▼

A vent for equalizing air pressure exerted on a roof of a building, comprising: a generally cylindrical, metal tube extending upwardly from said roof and through which air may pass from the interior of said building into the open atmosphere; a flange on one end of said tube for mounting said vent on

A vent for equalizing air pressure exerted on a roof of a building, comprising: a generally cylindrical, metal tube extending upwardly from said roof and through which air may pass from the interior of said building into the open atmosphere; a flange on one end of said tube for mounting said vent on said roof, said flange being adapted to overlie said roof; a valve assembly for controlling the flow of air through said tube, said valve assembly including a metal plate extending across said tube and secured to said flange, said plate being disposed between said roof and said flange, said plate including a central opening therein through which air may pass, said valve assembly further including a valve member mounted on said plate for selectively closing said opening; and, means sandwiched between said flange and said plate for thermally insulating said flange and said tube from said plate to prevent condensation of moisture on said plate.