Device for conducting the on-site measurement of the density...

Measuring and testing – Specific gravity or density of liquid or solid

Reexamination Certificate

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C073S038000, C073S030020

Reexamination Certificate

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07055370

ABSTRACT:
A device suitable for conducting an on-site measurement of the density and/or R-value of a gas-permeable material is provided. The device comprises a chamber comprising a first port and a second port; a diffuser in fluid communication with the second port of the chamber, wherein the diffuser comprises a diffuser port for conveying a gas flow to or from a gas-permeable material, and wherein the area of the diffuser port is greater than the area of the second port; and a pressure sensor arranged to measure the pressure in the chamber.

REFERENCES:
patent: 3788125 (1974-01-01), Kirschstein et al.
patent: 5005403 (1991-04-01), Steudle et al.
patent: 5509295 (1996-04-01), Bartoli
patent: 5633453 (1997-05-01), Johnson
patent: 5698772 (1997-12-01), Deruyter et al.
patent: 6826920 (2004-12-01), Wacker

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