Patent ID: 11906178
Assignee: nan
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A one-way valve assembly for preventing an escape of air from a building while permitting venting of ambient air into the building comprising;
a vertical conduit with an upper side, wherein the upper side is in connection with an outside air and;
a lower side of the vertical conduit is in communication with a cold air basin;
the cold air basin being bowl-shaped with an open top and having walls of a height part way up the vertical conduit;
a donut-shaped gravity-seated wall surrounding the vertical conduit and completely covering the open top of the cold air basin;
wherein a flange extending outward from the open top and a flange extending outward from the vertical conduit form a valve seat for the gravity-seated wall in a closed position; and
wherein the gravity-seated wall raises from the valve seat to an open position to allow the ambient air into the building.