Apparatus, application and method of making a gas flow regulator

Details Apparatus, application and method of making a gas flow regulator Apparatus, application and method of making a gas flow regulator

1989-08-07

1990-11-06

Raevis, Robert

Measuring and testing

With fluid pressure

Porosity or permeability

G01N 1508

Patent

active

049675915

ABSTRACT:
The gas flow regulator apparatus of the invention comprises a tube made of ductile metal which is crushed over a short portion of its length so that the inside wall of said tube makes contact with itself, and the tube is mounted in connection means for providing sealing around the tube and for mounting it in any equipment for measuring gaseous adsorbtion and desorbtion, in such a manner that the tube ensures that the equipment is continuously fed with gas at a very low flow rate lying in the range 0.025 mm.sup.3 /sec to 25 mm.sup.3 /sec at sonic velocity and regardless of any varying back pressure.

REFERENCES:
patent: 2729969 (1956-01-01), Innes
patent: 3139747 (1964-07-01), Ferrell et al.
patent: 3211007 (1965-10-01), Atkins
patent: 3255122 (1966-06-01), Constabaris et al.
patent: 3707870 (1973-01-01), Herve et al.
patent: 4489593 (1984-12-01), Pieters et al.

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