Fluid conduit having a variable inner diameter

Valves and valve actuation – Tube compressors – Fluid pressure actuated

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73708, 7386163, 138 45, 251 611, 25112904, 25112908, 251205, F16K 707, F16K 3102, G01F 142

Patent

active

053162617

ABSTRACT:
A flow measuring or flow metering device having a dynamically variable inner diameter. The flow device uses electrorheological fluid to support an inner flexible membrane. The quantity of electrorheological fluid is varied to change the inner diameter of the flexible membrane.

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American Cyanimid Company brochure, Oct. 1986.
"Putting ER Fluids to Work, Machine Design", May 9, 1991, pp. 52-60.
"Electrorheological Fluids and Devices", Automotive Engineering Dec. 1988, pp. 45-48.

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