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7387744 |
Method of making magnetic fluid
The present approach pertains to colloidal chemistry and methods of manufacturing magnetic fluid such as ferrofluid. In particular, the present approach is directed to methods of manufacturing...
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7335233 |
Magnetorheological fluid compositions and prosthetic knees utilizing same
The present invention relates in one embodiment to magnetorheological fluids utilized in prosthetic joints in general and, in particular, to magnetorheological fluids utilized in controllable...
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7297290 |
Nanostructured magnetorheological fluids and gels
Magnetorheological materials having a supramolecular polymer gel as a component of the carrier are disclosed. Useful supramolecular polymers for gels include those having terpyridine ligands which...
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7217372 |
Magnetorheological composition
The invention provides a magnetorheological device employing narrow design gap and containing a magnetic-responsive composition exhibiting reduced off-state forces and good performance....
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7198071 |
Systems and methods of loading fluid in a prosthetic knee
The invention in some embodiments relates to systems and methods of loading fluid in a prosthetic knee. A vacuum fill technique is utilized in one embodiment to load magnetorheological fluid within...
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7101487 |
Magnetorheological fluid compositions and prosthetic knees utilizing same
The present invention relates in one embodiment to magnetorheological fluids utilized in prosthetic joints in general and, in particular, to magnetorheological fluids utilized in controllable...
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7087184 |
MR fluid for increasing the output of a magnetorheological fluid device
What is disclosed is a magnetorheological fluid useful for incorporating within the working gap of magnetorheologically controllable linear or rotary devices. The MR fluid includes a carrier fluid...
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7070708 |
Magnetorheological fluid resistant to settling in natural rubber devices
A MR fluid formulation based upon a silicone liquid vehicle thickened with a treated fumed metal oxide and doped with one or more chemicals having hydrogen-bonding capability for use with natural...
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7070707 |
Magnetorheological composition
The invention provides a magnetorheological composition having reduced off-state forces and good performance. Specifically, this invention is directed to a magnetorheological composition that may...
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7063802 |
Composition and method of making an element-modified ferrofluid
An element-modified ferrofluid comprising a base oil, a plurality of magnetic particles covered with at least one surfactant, and an elemental modifier. The elemental modifier is a metal, a metal...
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7004817 |
Carrier assemblies, planarizing apparatuses including carrier assemblies, and methods for planarizing micro-device workpieces
Carrier assemblies, planarizing machines with carrier assemblies, and methods for mechanical and/or chemical-mechanical planarization of micro-device workpieces are disclosed herein. In one...
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6932917 |
Magnetorheological fluids
One embodiment of the invention includes an MR fluid of improved durability. The MR fluid is particularly useful in devices that subject the fluid to substantial centrifugal forces, such as large...
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6929756 |
Magnetorheological fluids with a molybdenum-amine complex
One embodiment of the invention includes an MR fluid of improved durability. The MR fluid is particularly useful in devices that subject the fluid to substantial centrifugal forces, such as large...
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6881353 |
Magnetorheological fluids with stearate and thiophosphate additives
One embodiment of the invention includes an MR fluid of improved durability. The MR fluid is particularly useful in devices that subject the fluid to substantial centrifugal forces, such as large...
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6878306 |
Magnetic writing screen dispersion medium
A magnetic dispersion medium is used in a magnetic writing screen toy. The dispersion medium is attracted to the underside of the screen when a magnetic tipped pen is passed over the upper surface...
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6875368 |
Magnetorheological fluid composition and a process for preparation thereof
The present invention relates to a magnetorheological fluid composition and a process for preparing the same, which has excellent magnetorheological properties. The fluid composition exhibits...
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6824701 |
Magnetorheological fluids with an additive package
One embodiment of the invention includes an MR fluid of improved durability. The MR fluid is particularly useful in devices that subject the fluid to substantial centrifugal forces, such as large...
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6824700 |
Glycol-based MR fluids with thickening agent
A magnetorheological fluid formulation comprising magnetizable particles dispersed in a non-aqueous, glycol-based liquid vehicle thickened effectively by either a fully treated fumed silica or an...
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6818143 |
Durable magnetorheological fluid
A durable magnetorheological fluid for use in a vibration dampening device is described. The MR fluid includes magnetizable particles having a particle size less than about 25 microns, a carrier...
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6815063 |
Magnetic fluid
There is disclosed a magnetic fluid medium which comprises a plurality of ferro- or ferri-magnetic particles, each of which particles has a largest dimension no greater than 100 nm, said particles...
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6811717 |
Magnetorheological compositions for use in magnetorheological fluids and method of preparing same
The subject invention provides a magnetorheological (MR) composition having improved resistance to oxidation and increased dispersability in a carrier fluid. The composition includes a plurality of...
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6787058 |
Low-cost MR fluids with powdered iron
An MR fluid formulation comprising water-atomized iron powder dispersed in a liquid vehicle, wherein the atomized iron powder contributes to a higher magnetic effect, a lower viscosity and...
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6780343 |
Stably dispersed magnetic viscous fluid
The present invention is directed to a stabilized dispersion magnetorheological fluid comprising a magnetic particle, a dispersive medium and a dispersing agent wherein said dispersing agent is a...
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6751004 |
Optical system with magnetorheological fluid
An optical system includes a layer of magneto rheological (MR) fluid having a surface exposed to air or vacuum. The MR fluid has a first state wherein the surface is reflective, and a second state...
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6743371 |
Magneto sensitive fluid composition and a process for preparation thereof
The present invention relates to a magneto sensitive fluid composition and a process of its preparation. The electrical conductivity of the composition varies reversibly in the presence of an...
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6712990 |
Magnetorheological fluids and related method of preparation
Magnetorheological (MR) fluids, dispersions of magnetically soft particles in fluids (gases, liquids, or semi-solids such as greases), are disclosed. The present invention uses the initial steps of...
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6692650 |
Magnetorheological fluid and process for preparing the same
The present invention provides a magnetorheological fluid in which magnetic particles coated with a hydrophilic surfactant are dispersed in a water in oil emulsion, and a process for preparing the...
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6679999 |
MR fluids containing magnetic stainless steel
A magnetorheological fluid formulation exhibiting consistently high yield stress during use. The MR fluid comprises martensitic or ferritic stainless steel particles prepared by a controlled water...
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6638443 |
Optimized synthetic base liquid for magnetorheological fluid formulations
A magnetorheological fluid formulation in which the base liquid is optimized to exhibit an acceptable viscosity, a low volatility, improved low temperature flow properties, and an improved...
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6610404 |
High yield stress magnetorheological material for spacecraft applications
A magnetorheological fluid ( 32 ) having controlled-shaped particles ( 56,68 ), such as rod, prism, tetrahedral, and other regularly shaped particles. The regularly shaped particles ( 56, 68 )...
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6599439 |
Durable magnetorheological fluid compositions
A durable magnetorheological fluid suitable for use in high compression vibration dampening devices comprising mechanically hard magnetizable particles of unreduced carbonyl iron, cobalt-iron...
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6592772 |
Stabilization of magnetorheological fluid suspensions using a mixture of organoclays
A magnetorheological fluid formulation comprising magnetizable particles dispersed in a multi-component liquid vehicle comprising an organoclay stabilization mixture. At least one organoclay is...
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6547986 |
Magnetorheological grease composition
The invention provides a magnetorheological grease composition which contains magnetic-responsive particles, a carrier fluid and a thickening agent. The composition according to the invention...
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6547983 |
Durable magnetorheological fluid compositions
A durable MR fluid formulation is described which includes mechanically hard magnetizable particles, a carrier fluid derived from a polyalphaolefin and a plasticizer, and at least one colloidal...
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6547842 |
Polishing material, grinding particle body for abrasion-grinding, method for producing a polishing material, and method for polishing or grinding, and polishing apparatus
This invention provides a polishing apparatus using a polishing material freely varying its shape in a tri-dimensional space in accordance with the shape of a work, and capable of polishing a...
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6527972 |
Magnetorheological polymer gels
Magnetorheological materials are provided comprising magnetic particles, a polymeric gel and a carrier material. The polymerization of the gel is preferentially accomplished in the presence of the...
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6491842 |
Anticorrosive magnetic nanocolloids protected by precious metals
The invention relates to new single- or multi-metallic magnetic colloid particles (for example, Fe, Co, Ni, Fe/Co) having a size of up to 20 nm, the surface of which is protected against corrosion...
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6451219 |
Use of high surface area untreated fumed silica in MR fluid formulation
A magnetorheological fluid formulation exhibiting high yield stress at high surfactant concentrations. The formulation has a strong network formation due to incorporation of a high surface area...
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6440322 |
Magnetic fluid and process for the production thereof
A magnetic fluid and a process for producing the same are provided. The magnetic fluid is an excellent fluid which mightily and precisely actuates by the action of an external magnetic field so...
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6413441 |
Magnetic polishing fluids
Magnetic polishing fluid compositions comprising various size colloidal and/or non-colloidal magnetic particle and colloidal size polishing particle compositions suitable for polishing ceramic and...
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6402978 |
Magnetic polishing fluids for polishing metal substrates
Magnetic polishing fluid compositions for polishing metal substrates containing colloidal and/or non-colloidal magnetic particles are described. The compositions contain oxidizers and, for example,...
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6402977 |
Composition for resin magnet, magnetic member using same and process for producing said magnetic members
There are disclosed a composition for resin magnets which comprises a thermoplastic resin and magnetic powders and which, when determined in a heated molten state, has specific viscosity...
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6395193 |
Magnetorheological compositions
The invention provides a magnetorheological composition having reduced off-state forces and good performance. Specifically, this invention is directed to a magnetorheological composition that may...
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6280658 |
Rheological fluid
A rheological fluid of a bright color which has excellent light resistance and weather resistance, is stable even when used in a high-temperature environment, can be stored over long, and mightily...
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6277298 |
Ferrofluid composition and process
The invention relates to a composition and process for producing a chemically stable magnetic fluid comprising a plurality of magnetic particles covered first with a small molecular weight surface...
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6261471 |
Composition and method of making a ferrofluid having an improved chemical stability
The invention relates to a composition and a process for producing a magnetic fluid comprising finely divided magnetic particles covered with at least one surfactant. A fluorocarbon-silane surface...
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6245253 |
Liquid composition and its use as magneto-rheological liquid
There are provided fluid compositions with particulate solid materials dispersed therein which are characterized by exceptionally low settling tendencies of the dispersed particles. Such...
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6221138 |
Jet ink with a magneto-rheological fluid
An ink composition suitable for use in ink jet printing comprising a coloring agent and carrier therefor which additionally contains a magneto-rheological fluid to control the viscosity and flow...
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6203717 |
Stable magnetorheological fluids
Magnetorheological fluid compositions that include a carrier fluid, magnetic-responsive particles and an organoclay. These fluids exhibit superior soft sedimentation.
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6183658 |
Process for preparing agglomerate-free nanoscalar iron oxide particles with a hydrolysis resistant coating
A process for preparing an agglomerate-free suspension of nanosize iron-containing oxide particles coated in a stable manner comprises preparing an aqueous suspension of nanosize iron-containing...
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