Fluid responsive to a magnetic field

Details Fluid responsive to a magnetic field Fluid responsive to a magnetic field

1989-09-22

1991-02-12

Willis, Prince E.

Compositions

Magnetic

Flaw detection or magnetic clutch

252 6251, 252 783, 252572, H01F 128

Patent

active

049921908

ABSTRACT:
A rheological fluid composition which is responsive to a magnetic field. The composition comprises magnetizable particulate, silica gel as a dispersant and a vehicle. A preferred magnetizable particulate is insulated, reduced carbonyl iron.

REFERENCES:
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patent: 2663809 (1953-12-01), Winslow
patent: 2886151 (1959-05-01), Winslow
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patent: 4645614 (1987-02-01), Goossens et al.
patent: 4668417 (1987-05-01), Goossens et al.
"Further Development of the NBS Magnetic Fluid Clutch", NBS Technical News Bulletin, vol. 34, p. 169 (1950).
Co-pending application Ser. No. 372,293, filed Jun. 27, 1989, assigned to the assignee of the present application.
Brochure published by GAF Corporation of Wayne, N.J. containing the code 1M-785, captioned "Carbonyl Iron Powders".
"Some Properties of Magnetic Fluids", J. D. Coolidge, Jr. and R. W. Halberg, AIEE Transactions, Paper 55-170 (Feb. 1955), pp. 149-152.
"The Magnetic Fluid Clutch", Jacob Rabinow, NBS Tech. Rep. No. 1213 (1948) [also, Trans. Amer. Inst. Elec. Eng. Preprint 48-238 (1948)].
"The Magnetic Fluid Clutch", S. F. Blunden, The Engineer, 191, 244 (1951).
"Further Development of the NBS Magnetic Fluid Clutch", NBS Tech. News Bull., 34, p. 168 (1950).

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