Method and magnetorheological fluid formulations for increasing the output of a magnetorheological fluid
First Claim
1. A magnetorheological fluid comprising a magnetizable particle component and a carrier component wherein said magnetizable particle component is a mixture of at least a first particle group having an average particle diameter and a second particle group having an average particle diameter wherein the average particle diameter of said first particle group is 3 to 15 times larger than the average particle diameter of said second particle group and wherein the particles of each of said first particle group and said second particle group have an average particle diameter of at least about 1 micron.
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Abstract
A magnetorheological fluid that includes a carrier component and a magnetizable particle component wherein the magnetizable particle component is a mixture of at least a first particle group having an average particle diameter and a second particle group having an average particle diameter wherein the average particle diameter of said first particle group is 3 to 15 times larger than the average particle diameter of said second particle group.
106 Citations
23 Claims
- 1. A magnetorheological fluid comprising a magnetizable particle component and a carrier component wherein said magnetizable particle component is a mixture of at least a first particle group having an average particle diameter and a second particle group having an average particle diameter wherein the average particle diameter of said first particle group is 3 to 15 times larger than the average particle diameter of said second particle group and wherein the particles of each of said first particle group and said second particle group have an average particle diameter of at least about 1 micron.
- 11. A magnetorheological fluid comprising a magnetizable particle component and a carrier component wherein said magnetizable particle component is a mixture of at least a first particle group having an average particle diameter and a second particle group having an average particle diameter wherein the average particle diameter of said first particle group is 3 to 15 times larger than the average particle diameter of said second particle group and wherein the particles of said second particle group are generally spherical.
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17. A magnetorheological fluid comprising a magnetizable particle component and a carrier component wherein said magnetizable particle component is a mixture of at least a first particle group having an average particle diameter and a second particle group having an average particle diameter wherein the average particle diameter of said first particle group is 3 to 15 times larger than the average particle diameter of said second particle group and wherein said carrier component is selected from the group consisting of natural fatty oil, mineral oil, polyphenylether, dibasic acid ester, neopentylpolyol ester, phosphite ester, synthetic cycloparaffin, synthetic paraffin, unsaturated hydrocarbon oil, monobasic acid ester, glycol ester and ether, fluorinated ester and ether, silicate ester, silicone oil, silicone copolymer, synthetic hydrocarbon, perfluorinated polyether and ester, halogenated hydrocarbon and water and mixtures and derivatives thereof.
- 18. A magnetorheological fluid comprising a magnetizable particle component and a carrier component wherein said magnetizable particle component is a mixture of at least a first particle group having an average particle diameter and a second particle group having an average particle diameter wherein the average particle diameter of said first particle group is 3 to 15 times larger than the average particle diameter of said second particle group and wherein said particle component is selected from the group consisting of iron, iron oxide, iron alloy and a mixture thereof.
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19. A magnetorheological fluid comprising a magnetizable particle component and a carrier component wherein said magnetizable particle component is a mixture of at least a first particle group having an average particle diameter and a second particle group having an average particle diameter wherein the average particle diameter of said first particle group is 4 to 9 times larger than the average particle diameter of said second particle group.
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20. A magnetorheological fluid comprising a magnetizable particle component and a carrier component wherein said magnetizable particle component is a mixture of at least a first particle group having an average particle diameter and a second particle group having an average particle diameter wherein the average particle diameter of said first particle group is 3 to 15 times larger than the average particle diameter of said second particle group and wherein the particles of said second particle group comprise carbonyl iron.
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22. A magnetorheological fluid comprising a magnetizable particle component and a carrier component wherein said magnetizable particle component is a mixture of at least a first particle group having an average particle diameter and a second particle group having an average particle diameter wherein the average particle diameter of said first particle group is 3 to 15 times larger than the average particle diameter of said second particle group and wherein the particles of said first particle group comprise iron powder.
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23. A magnetorheological fluid comprising a magnetizable particle component and a carrier component wherein said magnetizable particle component is a mixture of at least a first particle group having an average particle diameter and a second particle group having an average particle diameter wherein the average particle diameter of said first particle group is 3 to 15 times larger than the average particle diameter of said second particle group, further comprising a third particle group having an average particle diameter wherein the average particle diameter of said third particle group is different than the average particle diameter of said first and second particle groups.
Specification