Check valves

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F16Engineering elements F16KVALVES TAPS COCKS ACTUATING-FLOATS DEVICES FOR VENTING OR AERATING

F16K15/00Check valves

F16K15/02with guided rigid valve members F16K15/021the valve member being a movable body around which the medium flows when the valve is open F16K15/023the valve member consisting only of a predominantly disc-shaped flat element F16K15/025the valve being loaded by a helicoidal spring F16K15/026the valve member being a movable body around which the medium flows when the valve is open F16K15/028the valve member consisting only of a predominantly disc-shaped flat element F16K15/03with a hinged closure member F16K15/031the hinge being flexible F16K15/033spring-loaded F16K15/035with a plurality of valve members F16K15/036Dual valve members with hinges crossing the flow line substantially diametrical F16K15/038having a common hinge F16K15/04shaped as balls F16K15/042with a plurality of balls F16K15/044spring-loaded F16K15/046by a spring other than a helicoidal spring F16K15/048Ball features F16K15/06with guided stems F16K15/063the valve being loaded by a helicoidal spring F16K15/066with a plurality of valve members F16K15/08shaped as rings F16K15/10integral with, or rigidly fixed to, a common valve plate F16K15/12Springs for ring valves F16K15/14with flexible valve members F16K15/141the closure elements not being fixed to the valve body F16K15/142the closure elements being shaped as solids of revolution F16K15/144the closure elements being fixed along all or a part of their periphery F16K15/145the closure elements being shaped as a solids of revolution F16K15/147the closure elements having specially formed slits or being of an elongated easily collapsible form F16K15/148the closure elements being fixed in their centre F16K15/16with tongue-shaped laminae F16K15/18with actuating mechanism Combined check valves and actuated valves F16K15/181for check valves with a hinged closure member F16K15/183for ball check valves F16K15/185for check valves with flexible valve members F16K15/186Check valves which can be actuated by a pilot valve F16K15/188Check valves combined with valves having a rotating tap or cock F16K15/20specially designed for inflatable bodies F16K15/202and with flexible valve member F16K15/205and with closure plug F16K15/207and combined with other valves