AIRCRAFT WATER HEATING TANK AIR VENT VALVE

摘要

An aircraft water heating tank air vent valve includes an air vent valve housing having an upper vent valve body and a lower valve adapter sealingly mated together to define an interior chamber. A tubular collar is disposed within the interior chamber between an upper planar valve seat member and a lower notched valve seat member, and a ball float is movable within the tubular collar between first and second positions seated on the upper planar valve seat member or the lower notched valve seat member, respectively. The lower notched valve seat member includes oblique notches and frustoconical projections providing upper shoulders upon which the tubular collar is positioned, and providing outwardly flaring radially inner oblique edges upon which the ball float can be seated.

主权项

1. An air vent valve assembly for a tank assembly of a beverage maker for aircraft, comprising:
an air vent valve housing including an upper vent valve body and a lower valve adapter sealingly mated with the vent valve body, said upper vent valve body and said lower valve adapter together defining an interior chamber within said air vent valve housing, said upper vent valve body including an outlet flow passage connected in fluid communication with said interior chamber of said air vent valve housing, said lower valve adapter being configured to be attached to the tank assembly of the beverage maker, and said lower valve adapter having a flow inlet connected in fluid communication with the interior chamber of said air vent valve housing; an upper planar valve seat member disposed within the interior chamber of the vent valve body adjacent to said outflow passage of the vent valve body, the upper planar valve seat member having a surface defining a central flow aperture in fluid communication between said outflow passage of the vent valve body and said interior chamber of said air vent valve housing; a lower notched valve seat member disposed within the interior chamber of the vent valve body adjacent to said flow inlet of said lower valve adapter, said lower notched valve seat member including a central flow aperture in fluid communication between said flow inlet of said lower valve adapter and said interior chamber of said air vent valve housing; a tubular collar having a lumen disposed within the interior chamber of the vent valve body between said upper planar valve seat member and said lower notched valve seat member; a ball float movably disposed within the lumen of the tubular collar, the ball float being movable between a first position and a second position, said ball float being positioned within said tubular collar so as to be seated on said upper planar valve seat member in said first position, abutting and closing the central flow aperture of the upper planar valve seat member in said first position, and said ball float being seated on said lower notched valve seat member and spaced apart from and opening said central aperture of said upper planer valve seat member in said second position.