초록 ▼

A venting device intended for connection to a horizontal sanitary vent pipe, in which vacuum pressure excursions occur providing a need for the introduction of air from the outside of the pipe automatically by way of the device without allowing a reverse flow of the evil air from inside the pipe whe

A venting device intended for connection to a horizontal sanitary vent pipe, in which vacuum pressure excursions occur providing a need for the introduction of air from the outside of the pipe automatically by way of the device without allowing a reverse flow of the evil air from inside the pipe when pressure within is equalized or risen. The device has three adjacent ends. A first end comprises a cap forming tubular chamber integrally housing therein a suitable valve sealing means substantially covering an air inlet means situated within the chamber. The sealing means is securely closed at equilibrium and against high pressure, whilst automatically opening a vacuum within the pipe to admit air. The first end is adjacent a lower tubular body portion having a second and third end. The second end forms a suitable means for affixing the device to a horizontal vent pipe; whereas the third end terminates to an opening which may normally be closed by way of a removable repeatable access fitting. The device may be fully encased within a suitable wall mounted receptacle having a removable face with a plurality of air openings providing air movement, concealability and ready accessibility within a wall cavity to the venting device.

대표청구항 ▼

[ What is claimed is:] [1.] An air admittance valve adapted to be affixed to a vent pipe of a sanitary drainage system of a building to eliminate the need for said vent pipe to extend through the roof of the building comprising a tubular body member having a total of three ends, a first of said ends

[ What is claimed is:] [1.] An air admittance valve adapted to be affixed to a vent pipe of a sanitary drainage system of a building to eliminate the need for said vent pipe to extend through the roof of the building comprising a tubular body member having a total of three ends, a first of said ends being adapted to be affixed to said sanitary drainage vent pipe, a second of said ends comprising an upper end, valve means directly connected to said second end for admitting ambient air to said vent pipe through said second end and said first end upon the presence of a pressure drop in said vent pipe and for closing off said second end at equilibrium and when there is an increase of pressure in said body member thus preventing the escape of fluid through said second end, and a third of said ends opening to the exterior of said body member and communicating with said first and second ends interiorly of said body member.