COUNTER PRESSURE FILLING FITTINGS FOR A CONTAINER WITH A LOWER LIQUID SUPPLY Russian patent published in 2025 - IPC E03D1/30 F16K31/24 

FIELD: sanitary devices.

SUBSTANCE: filling fitting comprises an inlet valve housing fixedly mounted in a hole in the bottom of the container with a nozzle for connecting a supply line, a seat of a shut-off element, and a valve seat located inside the seat of the shutoff element, narrowing the through hole of the nozzle and made with the possibility of placing the shutoff element on it, a shutoff element housing mounted inside the container, comprising a shutoff element cover configured to interact with the shutoff element seat, and inside the shutoff element cover, a valve cover configured to be arranged between the valve seat and the shutoff element seat and interact with the shutoff element. Shutoff element is made of elastic stocking type with side walls turned outwards, the base of which along the perimeter holds an axial position fixture installed between the cover and the seat of the shutoff element, and with annular groove along the perimeter in the upper part, interlocking with the stepped projection along the perimeter of the inner side wall of the valve cover. Shutoff element is made with possibility of opening the passage opening under the pressure of the liquid entering the container and closing the passage opening under the action of the buoyancy force on the float, transmitted from the float through the rod, movably connected to the housing of the shutoff element by parallel hinged upper and lower rockers, and through lower rocker by pushing force on vertical movable pusher, lower end resting on shutoff element. Between the shutoff element cover inner side surface and the shutoff element seat outer side surface, between the shutoff element seat inner side surface and the valve cover outer side surface there are gaps, said gaps communicate with each other at shutoff element body lift by fluid pressure to make throttling orifices communicating valve working chamber with container inner volume to allow throttling of water flow through said orifices.

EFFECT: improving operating reliability of back pressure filling fittings for a container with a lower liquid supply and enlarging the range of technical facilities.

10 cl, 2 dwg