Capteur de débit


Flow sensor


A flow sensor comprises a body (4) formed with a through bore (5), at least one fluid inlet (6, 7) and one fluid outlet (7,6) for permitting ingress and egress of fluid to and from the sensor, and a spool (8) slidably mounted within the bore and having at least one shaped end (38) past which fluid flows from the inlet to the outlet, characterised in that the spool (8) also has resilient means (26) mounted internally thereof and acting against and between two spaced abutments (27, 28) which are connected to the interior of the spool in such a way that they move with the spool in one direction of movement thereof and slide relative to the spool in the opposite direction of movement thereof, the spool being arranged to close the outlet in the null position of the spool when no fluid flow takes place, and being movable against the action of the resilient means when fluid flow is present, to open the outlet, the extent of movement being representative of the rate of flow of the fluid and being sensed by sensor means (37) associated with the spool to provide an output also representative of fluid flow.




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Patent Citations (5)

    Publication numberPublication dateAssigneeTitle
    DE-2110688-A1September 07, 1972Paul HessDurchflussmesseinrichtung fuer fluessige und gasfoermige Medien
    DE-2931215-A1February 19, 1981Rexroth Gmbh G LFlowmeter accurately measuring flow direction changes - has cylinder with piston position sensor and piston by=pass channel
    FR-2075936-A1October 15, 1971Sperry Rand Corp
    GB-2022847-ADecember 19, 1979Sperry Rand CorpFluid Flow Sensor
    GB-2068560-AAugust 12, 1981Transamerica Delaval IncElectrical transducer responsive to fluid flow

NO-Patent Citations (0)


Cited By (4)

    Publication numberPublication dateAssigneeTitle
    DE-19612370-C1November 20, 1997Samson AgVerfahren und Vorrichtung zur Durchflußbestimmung eines Prozeßmediums an einem Stellgerät
    US-5313844-AMay 24, 1994Micro Hydraulics Inc.Flow transducer
    US-5827978-AOctober 27, 1998Microhydraulics, Inc.Flow transducer
    WO-9325868-A1December 23, 1993Micro Hydraulics Inc.Transducteur de debit