Method and apparatus for measuring flow rate and controlling delivered volume of fluid through a valve aperture
First Claim
1. An apparatus for measuring flow rate and controlling delivered volume of fluid flow in a fluid conduit comprising:
- valve means, disposed in said fluid conduit, for selectively opening and closing a fixed aperture between an open position and a closed position;
means for measuring a differential pressure between a first pressure on an upstream side of said valve means and a second pressure on a downstream side of said valve means; and
means for accumulating said differential pressure with respect to time to provide a value corresponding to a volume of fluid flow passing through said valve means when in said open position.
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Accused Products
Abstract
An apparatus for measuring flow rate and controlling delivered volume of fluid flow in a fluid conduit is disclosed including a valve having a fixed aperture disposed in the fluid conduit for selectively opening and closing the aperture between an open position and a closed position. The valve is selectively closed when a predetermined volume has passed through the valve. Differential pressure is measured across the valve and the differential pressure is accumulated with respect to time to provide a value corresponding to volume of fluid flow passing through the valve when in the open position. A method for measuring flow rate and controlling delivered volume of fluid flow through a fluid conduit includes the steps of selectively opening and closing a valve having a fixed aperture disposed in the fluid conduit between an open position and a closed position, measuring a differential pressure between a first pressure on an upstream side of the valve and a second pressure on a downstream side of the valve, and when the valve is in the open position, accumulating the differential pressure with respect to time to obtain a value corresponding to volume of fluid flow passing through the valve.
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Citations
16 Claims
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1. An apparatus for measuring flow rate and controlling delivered volume of fluid flow in a fluid conduit comprising:
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valve means, disposed in said fluid conduit, for selectively opening and closing a fixed aperture between an open position and a closed position; means for measuring a differential pressure between a first pressure on an upstream side of said valve means and a second pressure on a downstream side of said valve means; and means for accumulating said differential pressure with respect to time to provide a value corresponding to a volume of fluid flow passing through said valve means when in said open position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for measuring flow rate and controlling delivered volume of fluid flow through a fluid conduit comprising the steps of:
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selectively opening and closing valve means having a fixed aperture disposed in said fluid conduit between an open position and a closed position; measuring a differential pressure between a first pressure on an upstream side of said valve means and a second pressure on a downstream side of said valve means; and when said valve means is in said open position, accumulating said differential pressure with respect to time to obtain a value corresponding to volume of fluid flow passing through said valve means. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification