Will Ross, Inc.

G.d. Searle & Company

E Craig Waters

Thomas W Clements

A variable area meter unit is described which is self-contained to provide a meter tube in an enclosure and facilitate insertion and location of the tube in a standard support frame. The enclosure can be manufactured with a viewing face consisting of a lens to improve readability through single axis magnification. Additionally, a high pressure release panel can form another side of the enclosure to direct any blow-outs in a preferred direction.

Variable area meter insert unit

A variable area metering tube is described having a non-linear graduated measuring scale wherein the scale compensates for non-standard variations in the cross-sectional flow area of the metering tube.

Variable area metering tube and method of manufacture

A low flow needle valve assembly is described having a non-metallic valve stem guide and a cross-flow system such that fluid flow occurs over only metallic metering surfaces. The valve assembly is particularly advantageous in view of its low cost and its smooth, non-reversing flow characteristics which result in precise control of extremely low fluid flow rates.

Growing community of inventors

Lansdale, PA, United States of America

E Craig Waters