The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 18, 1999
Filed:
Aug. 18, 1997
Paul G DeDecker, Warren, MI (US);
Paul S Freed, Bloomfield Hills, MI (US);
L.VAD Technology, Inc., Detroit, MI (US);
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.