Abstract: Improved chilling apparatus for aircraft meal tray storage and/or serving carts utilizes a slidable tray type of bunker member for receiving dry ice or other cooling material. The bunker member is preferably of thermoformed plastic, is insulated on its bottom and sides, and has a channeled bottom which supports pieces of dry ice while permitting air to be circulated by a blower under the dry ice pieces as well as around and over them. At its downstream end, the bunker has an air flow turning surface and an air discharge opening through its bottom. At its upstream end, an opening directs return air which has passed over the meal trays to an angularly positioned blower located in the cart housing above the inlet end of the bunker.

Abstract: A toilet including, a bowl having at the top thereof a substantially horizontal annular flange which merges into a substantially vertically extending annular lip portion, a pin secured to the bowl, an opening defined in the lip portion at a location remote from the pin, a flush ring having an annular flange for seating on the bowl flange portion, the flush ring including an outwardly projecting tab portion selectively configured for insertion into the opening, and latch means pivotally secured to the flush ring for selective locking engagement with the pin.

Abstract: A self-contained toilet comprising a collecting tank, means for rinsing the interior of the collecting tank including a rinsing manifold, a rinsing conduit, and a check valve operatively connecting the rinsing manifold and rinsing conduit, and means for preventing liquid contained within the rinsing manifold from being forced through the check valve by a pressure differential thereacross including a second check valve, and check valve conduit means communicating at one end with one end of the second check valve and communicating at the other end with the rinsing means at a location proximate the connection of the rinsing manifold and the first check valve.

Abstract: A pump-filter assembly for a recirculating toilet comprising, an axial flow pump including a support tube and a drive shaft supported therein, means for rotating the drive shaft in first and second opposite directions, a first impeller secured to the drive shaft, the impeller being selectively configured to pump when the drive shaft is rotated in the first direction and to forcefully draw in air when the drive shaft is rotated in the second direction, the drive shaft extending below the support tube, a second impeller supported on the drive shaft at a location below the support tube for free-wheeling rotation thereon, a ratchet mechanism secured to the portion of the drive shaft extending below the support tube, and a pawl mechanism secured to the second impeller means for selective driving engagement with the ratchet mechanism when the drive shaft is driven in the opposite second direction, and filter means surrounding the axial flow pump.