Patent ID: 6164142
Filing Date: 2000-12-26
Classification: G01F

Abstract:
An air flow measurement device for measuring air flow within a cylindrical conduit comprisinga cylindrical connector for connecting the air flow between spaced ends of said cylindrical conduit,a flat orifice plate having a plurality of uniformly spaced passages of uniform diameter extending therethrough,a pair of cylindrical sleeve units for tightly securing said orifice plate therebetween and for airtight securement within said cylindrical connector so that said orifice plate is positioned at a right angle to the air flow through the conduit, each of the sleeve units including a plurality of circumferentially spaced and radially extending passageways adapted to communicate with the air in the conduit on one of the upstream and downstream sides of said orifice plate, each of the sleeve units further including a circumferential groove extending about the cuter circumference of the unit for communication with said respective radially extending passageways,and a pair of spaced valves mounted upon and extending through the wall of the connector so as to communicate respectively with the circumferential grooves of the sleeve units, said valves being arranged to be coupled to a differential pressure meter for determining the pressure difference across said orifice plate in order to determine the air flow therethrough.