Abstract:
A method for obtaining a mechanical lock between two surfaces (10, 12) by providing particulate granules (18) between the surfaces and forcing the surfaces (10, 12) toward one another at a pressure sufficient to embed a substantial number of the particulate granules (18) in both of the surfaces. The method is preferably utilized during the formation of a hem flange, so as to provide immediate handling strength to the hem flange without the need for adhesive compositions.
Abstract:
A magnetorheological material containing a carrier fluid and a magnetically active particle. The particle has been modified so that the surface of the particle is substantially free of contamination products. The contamination products are removed from the surface of the particle by abrader processing, chemical treatment or a combination thereof. Magnetorheological materials prepared using the particles from which contamination products have been removed exhibit significantly enhanced magnetorheological effects.
Abstract:
A magnetorheological material containing a carrier fluid, a particle component and a thixotropic additive to provide stability against particle settling. The thixotropic additive can be a hydrogen-bonding thixotropic agent, a polymer-modified metal oxide, or a mixture thereof. The utilization of a thixotropic additive creates a thixotropic network which is unusually effective at minimizing particle settling in a magnetorheological material.
Abstract:
A magnetorheological material containing a carrier fluid and an iron alloy particle component. The particle component can be either an iron-cobalt alloy or an iron-nickel alloy. The iron-cobalt alloy has an iron:cobalt ratio ranging from about 30:70 to 95:5 while the iron-nickel alloy has an iron:nickel ratio ranging from about 90:10 to 99:1. The iron alloy particle components are capable of imparting high yield stress capability to magnetorheological materials.
Abstract:
Electrorheological materials containing a particle component and a carrier fluid that has been modified to minimize conductivity. The carrier fluid is modified by extensive purification or by the formation of a miscible solution with a low conductivity carrier fluid. The modification techniques allow previously unacceptable carrier fluids to be utilized in an electrorheological material which exhibits significant electrorheological activity over a broad temperature range.
Abstract:
An electrorheological material containing a particle component and a carrier fluid. The carrier fluid has a dielectric constant between about 3.0 and 7.5 and an observed conductivity less than about 1.00 X 10-7 S/m. The carrier fluid can be a silicone copolymer, a hindered ester compound or a cyanoalkylsiloxane homopolymer. The electrorheological materials exhibit substantial electroactivity over a broad temperature range.
Abstract:
An aqueous adhesive composition for bonding nitrile rubber. The adhesive composition contains a chlorosulfonated polyethylene latex, a polyhydroxy phenolic resin copolymer, and a high molecular weight aldehyde polymer. The adhesive composition exhibits an unusual affinity for nitrile rubber and exhibits excellent adhesive performance as a single-coat formulation. The adhesive composition withstands high temperature bonding conditions and minimizes the utilization of volatile organic solvents.
Abstract:
A zinc-stable ceramic ink composition which contains a metal oxide, a glass frit, a UV-curable vehicle, zinc powder, and a calcium-containing organic complex. The calcium-containing organic complex prevents premature polymerization of the UV-curable vehicle so that the zinc-containing ink composition may be stored for extended periods of time prior to use.
Abstract:
Several improved embodiments of surface effect dampers that produce a damping force including both hysteretic and frictional components. Various improvements include an amplitude sensitive feature or decoupler mechanism to eliminate or greatly reduce the damping for low amplitude input conditions as compared to high amplitude inputs, provisions for increasing the damping force in a non-linear manner, and features for providing significantly greater damping in one direction than the other. Other embodiments include an improved rotational surface effect damper useful for damping rotational motion, and a multiaxial damper which can be used, for example, as a motor mount which has the capability for the piston to tilt relative to the axis of its piston rod, allowing accommodation of torsional rotation of the engine while not compromising vibration isolation.
Abstract:
A magnetostrictive sensor system and a method of measuring a magnetostrictive sensor pulse is provided. The measurement system and method includes providing a digital buffer circuit connected with an analog to digital converter to a an analog waveform detector for receiving a magnetostrictive pulse waveform from a magnetostrictive waveguide. A template waveform is provided, and a returned magnetostrictive pulse waveform is received into the digital buffer circuit. The received pulse waveform is compared with the template waveform to determine an arrival time of the returned magnetostrictive pulse waveform. Providing the template waveform includes providing a synthesized return waveform generated to simulate a characteristic magnetostrictive return pulse waveform of the magnetostrictive system. The magnetostrictive sensor system includes a magnetostrictive waveguide, an analog waveform detector for receiving a magnetostrictive pulse waveform from the magnetostrictive waveguide, a comparing correlating processor with a template waveform for comparing the received magnetostrictive pulse waveform with the template waveform to determine an arrival time of the returned magnetostrictive pulse waveform.