Compositions – Heat-exchange – low-freezing or pour point – or high boiling... – Organic components
Patent
1987-10-21
1989-11-07
Wax, Robert A.
Compositions
Heat-exchange, low-freezing or pour point, or high boiling...
Organic components
252 73, 252 77, 252 781, 252 783, 252 79, H01B 320
Patent
active
048790567
ABSTRACT:
An improved method of inducing a change in the dynamic torque transmission of an electrorheological fluid in response to an electric field at low current comprising the steps of: (a) selecting a nonconductive liquid phase (e.g. high dielectric hydrocarbon oil); (b) dispersing in the nonconductive liquid phase a particulate phase substantially free of adsorbed water (e.g. zeolite); and (c) subjecting the resulting electrorheological fluid to an electric potential in excess of about one kilovolt at a current density of less than about one-third microamp per square inch. Such a method achieves a rate of increase of dynamic transmission of torque per unit voltage, dM/dV, in excess of about 0.034 ft-lbs.times.10.sup.-3 /kV and a ratio of dynamic transmission of torque at an electric field strength of at least 2.4 kV to the dynamic transmission of torque at zero field strength, M/Mo, of at least about 2.
REFERENCES:
patent: 3047507 (1962-07-01), Winslow
patent: 3250726 (1966-05-01), Martinek et al.
patent: 3367872 (1968-02-01), Martinek et al.
patent: 3984086 (1976-10-01), Gerrish
patent: 4033892 (1977-07-01), Stangroom
patent: 4129513 (1978-12-01), Stangroom
patent: 4342334 (1982-08-01), Stangroom
patent: 4444298 (1984-04-01), Stangroom
patent: 4483788 (1984-11-01), Stangroom et al.
patent: 4493615 (1985-01-01), Stangroom
patent: 4502973 (1985-03-01), Stangroom
patent: 4687589 (1987-08-01), Block et al.
Electrorheological Fluids by J. E. Stangroom, Physics in Tech., vol. 14, 3.
ER Fluid Devices Near Commercial Stage by David Scott, Automotive Engineering, Nov. 1985.
Solidifying Fluid Transforms Clutches and Flow Valves Automotive Engineering, Nov. 1983.
Armstrong William F.
Filisko Frank E.
Board of Regents Acting for and on Behalf of University of Michi
Stevenson Robert B.
Wax Robert A.
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