Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow

GPHYSICS G01Measuring instruments G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL METERING BY VOLUME

G01F3/00Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow

G01F3/02with measuring chambers which expand or contract during measurement G01F3/04having rigid movable walls G01F3/06comprising members rotating in a fluid-tight or substantially fluid-tight manner in a housing G01F3/065sliding-vane meters G01F3/08Rotary piston or ring piston meters G01F3/10Geared or lobed impeller meters G01F3/12Meters with nutating members G01F3/14comprising reciprocating pistons G01F3/16in stationary cylinders G01F3/18involving two or more cylinders G01F3/20having flexible movable walls G01F3/22for gases G01F3/221Valves therefor G01F3/222characterised by drive mechanism for valves or membrane index mechanism G01F3/223with adjustment of stroke or timing; Calibration thereof; Testing G01F3/224with means for pressure or temperature compensation G01F3/225characterised by constructional features of membranes or by means for improving proper functioning of membranes G01F3/226characterised by features of meter body or housing G01F3/227characterised by the means for transfer of membrane movement information to indicating means G01F3/228using mechanical transmission means G01F3/24with measuring chambers moved during operation G01F3/26Tilting-trap meters G01F3/28on carriers rotated by the weight of the liquid in the measuring chambers G01F3/30Wet gas-meters G01F3/32comprising partitioned drums rotating or nutating in a liquid G01F3/34comprising bells reciprocating in a liquid G01F3/36with stationary measuring chambers having constant volume during measurement G01F3/38having only one measuring chamber