Measuring and testing – Volume or rate of flow – Expansible chamber
Patent
1993-07-26
1994-11-01
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Expansible chamber
418 64, G01F 308, F16N 1320
Patent
active
053598920
ABSTRACT:
A flowmeter measuring chamber having a generally cylindrical outer wall, a generally cylindrical inner wall, and a piston, having a tubular wall disposed between the inner and outer walls and arranged to oscillate within the outer wall, is provided with a mechanism for controlling movement of the tubular wall. That movement is controlled so that a capillary space is maintained between the tubular wall and the inner wall and between the tubular wall and the outer wall at all positions of the piston and contact between the tubular wall and the inner and outer walls is prevented.
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Goldstein Herbert
Oen William L.
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