Flowmeter

Claim 1

A FLOWMETER, COMPRISING (A) A HOUSING HAVING AN INLET ADAPTED TO BE CONNECTED TO A SOURCE OF FLUID UNDER PRESSURE AND AN OUTLET ADAPTED TO BE CONNECTED TO A POINT OF USE FOR SAID FLUID, (B) MOVABLE PRESSURE RESPONSIVE MEANS IN SAID HOUSING DEFINING A PRESSRUE CHAMBER AT ONE END OF SAID HOUSING AT ONE SIDE OF THE PRESSURE RESPONSIVE MEANS AND A RECEIVING CHAMBER AT THE OTHER SIDE OF SAID PRESSURE RESPONSIVE MEANS, SAID INLET COMMUNICATING WITH SAID PRESSURE CHAMBER AND SAID OUTLET COMMUNICATING WITH SAID RECEIVING CHAMBER, (C) SAID PRESSURE RESPONSIVE MEANS BEING URGED TOWARD SAID ONE END, (D) SAID PRESSURE RESPONSIVE MEANS HAVING AN UNOBSTRUCTED OPENING THEREIN AND A TAPERED ELONGATED MEMBER MOUNTED IN SAID HOUSING AND EXTENDING INTO SAID OPENING, SAID PRESSURE RESPONSIVE MEANS BEING MOVABLE TOWARD SAID ONE END WHEN THE PRESSURE DIFFERENCE BETWEEN SAID CHAMBERS DECREASES AND BEING MOVABLE TOWARD SAID OTHER END WHEN THE PRESSURE DIFFERENCE BETWEEN SAID CHAMBERS INCREASES, (E) STOP MEANS FOR LIMITING MOVEMENT OF SAID PRESSURE RESPONSIVE MEANS TOWARD THE LARGER END OF SAID TAPERED MEMBER TO MAINTAIN THE MARGIN OF SAID OPENING RADIALLY SPACED FROM SAID MEMBER THROUGHOUT THE RANGE OF MOVEMENT OF SAID PRESSURE RESPONSIVE MEANS, (F) MEANS RESPONSIVE TO THE POSITION OF SAID PRESSURE RESPONSIVE MEANS FOR INDICATING THE RATE OF FLUID FLOW THROUGH SAID METER, AND (G) SAID ELONGATED MEMBER HAVING A LENGTH SUCH THAT SAID PRESSURE RESPONSIVE MEANS MOVES BEYOND THE END OF SAID MEMBER WHEREBY SAID MEMBER IS COMPLETELY WITHDRAWN FROM SAID OPENING LEAVING SAID OPENING UNOBSTRUCTED ON PRESSURE SURGES IN SAID PRESSURE CHAMBER TO QUICKLY EQUALIZE THE PRESSURES IN SAID CHAMBERS.