Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Viscosity
Patent
1978-06-23
1980-01-29
Kreitman, Stephen A.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Viscosity
73343R, 264 404, G01N 1106, G01N 1108
Patent
active
041854934
ABSTRACT:
A rheometer which is especially useful for measuring the viscosity of a heated coal-type material which undergoes phase changes at elevated temperatures, and which is of the type that includes a cylinder with a narrow exit and a piston for applying pressure to a sample in the cylinder to force the sample out through the exit. The piston includes a seal formed of a sheet of compressed carbon material which extends between the body of the piston and the walls of the cylinder, to form a substantially gas-tight fit that keeps in gases produced at elevated temperatures of a coal sample. The end walls of the cylinder and piston are tapered into a conical shape, and the sample is formed with conical surfaces to mate therewith, to provide a smooth outflow of material and high heat transfer to the sample from the cylinder and piston walls.
REFERENCES:
patent: 3242720 (1966-03-01), Zavasnik
patent: 3270553 (1966-09-01), Ballman
patent: 3300225 (1967-01-01), Shepler
patent: 3758776 (1973-09-01), Frohne
patent: 3843290 (1974-10-01), Sender
Feinstein Samuel P.
Frosch Robert A. Administrator of the National Aeronautics and Space
Corr Denis E.
Kreitman Stephen A.
Manning John R.
McCaul Paul F.
Mott Monte F.
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