Flowmeter

Author:  Gobel, Charles
Source:  US Patent 2,781,660
Doc ID:  1957002
Year of Publication:  1957
Abstract:  
The present invention relates to flowmeters, especially suited for the measurement of flow in liquids which are opaque, and particularly for measuring the extracorporeal flow of animal (including human) blood. A purpose of the invention is to obtain more accurate measurement of flow of liquids, especially opaque liquids, and particularly animal blood including human blood, by avoiding the tendency of the meniscus to vibrate up and down, by carrying the flow between inner and outer tubes in a transverse direction to the axis and preferably tangentially.