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 Title: |
US5435931:
Protein enhanced electrorheological fluids
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Kim, Sangtae; Shorewood Hills, WI
Klingenberg, Daniel J.; Stoughton, WI
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| Assignee: |
Wisconsin Alumni Research Foundation, Madison, WI
other patents from WISCONSIN ALUMNI RESEARCH FOUNDATION (631280) (approx. 1,178)
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| Published / Filed: |
1995-07-25
/ 1993-11-04
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| Application Number: |
US1993000147709
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| IPC Code: |
Advanced:
C10M 171/00;
Core:
more...
IPC-7:
C09K 3/00;
C10M 171/00;
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| ECLA Code: |
C10M171/00B;
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| U.S. Class: |
Current:
252/075;
252/076;
252/077;
252/079;
252/572;
Original:
252/075;
252/076;
252/077;
252/079;
252/572;
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| Field of Search: |
252/572,75,76,77,79
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| Priority Number: |
| 1993-11-04 |
US1993000147709 |
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| Abstract: |
An enhanced ER fluid is disclosed. Polypeptides such as proteins are added to ER fluids. The ER response, particularly increased viscosity in response to an electric potential difference applied to the fluid, is enhanced.
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| Attorney, Agent or Firm: |
Quarles & Brady ;
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| Primary / Asst. Examiners: |
Skane, Christine;
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| Maintenance Status: |
E2 Expired Check current status
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| INPADOC Legal Status: |
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| Family: |
None
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First Claim:
Show all 4 claims |
We claim:
1. An electrorheological fluid, comprising:
- a low conductivity liquid selected from the group consisting of oils and halogenated hydrocarbons;
- a protein; and
- porous particles dispersed in the liquid; wherein:
- (a) pores of the particles receive at least a part of the protein with some of the pores having an opening of at least 60 Angstroms, or
- (b) the protein was pre-imbedded in the particles prior to insertion of the particles in the liquid;
- wherein the volume fraction of the particles in the fluid is between 0.05 and 0.50; and
- wherein the protein is 0.01% to 1% by weight of the fluid, and the fluid is such that an electric potential difference provided across the fluid can increase the viscosity of the fluid to a greater extent than the increase in viscosity would be if the fluid did not contain the protein.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 1 U.S. patent(s) that reference this one
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| Foreign References: |
None
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| Other Abstract Info: |
CHEMABS 123(18)233158F
CAN123(18)233158F
DERABS C95-268738
DERC95-268738
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| Other References: |
L. Gindin, et al., "New data on electrical breakdown of suspensions of aluminum in dielectrics", English Translation of Doklady Akademii Nauk SSSR, 162(4):839-842, Jun. 1965.
L. Gindin, et al., "A structure formation of (the) disperse systems in an electric field", Uspekhi Khim., 37(1);130-142 (1968), Plus partial translation.
Electrorheological (ER) Fluids, A Research Needs Assessment, Final Report, U.S. Department of Energy, May 1993.
D. J. Klingenberg, "Simulation of the dynamic oscillatory response of electrorheological suspensions . . . ", J. Rheol., 37(2):199-214, Mar./Apr. 1993.
(16 pages)
[ISI abstract]
R. Pool, "Fluids with a case of split personality", Science, 247:1180-81, Mar. 9, 1990.
(2 pages)
D. L. Hartsock, et al., "ER fluid requirements for automotive devices", J. Rheol., 35(7):1305-1326 (1991).
(22 pages)
[ISI abstract]
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