Control of fluid pressure

GPHYSICS G05Controlling systems G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES

G05D16/00Control of fluid pressure

G05D16/02Modifications to reduce the effects of instability G05D16/04without auxiliary power G05D16/06the sensing element being a flexible membrane, yielding to pressure G05D16/0602two controllers being mounted in series G05D16/0605two controllers being mounted in parallel G05D16/0608the controller being mounted within the flow path and having slidable elements G05D16/0611the sensing element being deformable G05D16/0613the deformable sensing element acting as a throttling member G05D16/0616the sensing element being a bellow G05D16/0619acting directly on the obturator G05D16/0622characterised by the form of the obturator G05D16/0625acting indirectly on the obturator G05D16/0627characterised by the form of the obturator G05D16/063the sensing element being a membrane G05D16/0633characterised by the properties of the membrane G05D16/0636characterised by the loading device of the membrane G05D16/0638characterised by the form of the obturator G05D16/0641the obturator is a membrane G05D16/0644the membrane acting directly on the obturator G05D16/0647using one membrane without spring G05D16/065characterised by the form of the obturator G05D16/0652using several membranes without spring G05D16/0655using one spring-loaded membrane G05D16/0658characterised by the form of the obturator G05D16/0661characterised by the loading mechanisms of the membrane G05D16/0663using a spring-loaded membrane with a spring-loaded slideable obturator G05D16/0666characterised by the form of the obturator G05D16/0669characterised by the loading mechanisms of the membrane G05D16/0672using several spring-loaded membranes G05D16/0675the membrane acting on the obturator through a lever G05D16/0677using one membrane without spring G05D16/068characterised by the form of the obturator G05D16/0683using a spring-loaded membrane G05D16/0686characterised by the form of the lever G05D16/0688characterised by the form of the obturator G05D16/0691characterised by the loading mechanisms of the membrane G05D16/0694using a spring-loaded membrane with a spring-loaded slideable obturator G05D16/0697using several membranes G05D16/08Control of liquid pressure G05D16/10the sensing element being a piston or plunger G05D16/103with sensing element placed within the flow-path G05D16/106using sliding elements G05D16/12the sensing element being a float G05D16/14with auxiliary non-electric power G05D16/16derived from the controlled fluid G05D16/163using one or several membranes G05D16/166using one or several pistons G05D16/18derived from an external source G05D16/185using one or several membranes G05D16/20characterised by the use of electric means G05D16/2006with direct action of electric energy on controlling means G05D16/2013using throttling means G05D16/202actuated by an electric motor G05D16/2026with a plurality of throttling means G05D16/2033the plurality of throttling means being arranged in series G05D16/204the plurality of throttling means being arranged in parallel G05D16/2046the plurality of throttling means being arranged for the control of a single pressure from a plurality of converging pressures G05D16/2053the plurality of throttling means comprising only a first throttling means acting on a higher pressure and a second throttling means acting on a lower pressure G05D16/206the plurality of throttling means being arranged for the control of a plurality of diverging pressures from a single pressure G05D16/2066using control means acting on the pressure source G05D16/2073with a plurality of pressure sources G05D16/208using a combination of controlling means as defined in G05D16/2013 and G05D16/2066 G05D16/2086without direct action of electric energy on the controlling means G05D16/2093with combination of electric and non-electric auxiliary power