Abstract:
A metal matrix composite is produced by rapidly solidifying an aliminum base alloy directly into wire. The wire is arc sprayed onto at least one substrate having thereon a fiber reinforcing material to form a plurality of preforms. Each of the preforms has a layer of the alloy deposited thereon, and the fiber reinforcing material is present in an amount ranging from about 0.1 to 75 percent by volume thereof. The preforms are bonded together to form an engineering shape.
Abstract:
A water washable protective coating composition for application to surfaces subjected to contact with airborne paints which composition comprises an ionomer of a copolymer of an acrylic acid and an alpha-olefin. The composition forms a protective, clear low-slip coating layer upon surfaces, and is readily removable with heated water.
Abstract:
The present invention provides a cooling medium for use in a thermal energy storage system comprising water, a guest molecule and a surfactant having a critical micelle concentration in an amount less than about twice said critical micelle concentration. Preferably the critical micelle concentration is less than about 1x10 M and more preferably between 1x10 M and 1x10 M. A thermal energy storage unit which uses said cooling medium and a process for using said thermal energy storage unit are also disclosed.
Abstract:
The present invention provides flexible nylon films comprising, based on the total weight of the composition, from about 50 to about 95 weight % of a polyamide and from about 5 to about 50 weight % of a modified polyolefin having a functional moiety selected from the group consisting of unsaturated polycarboxylic acids and acid anhydrides wherein the tensile modulus of a film formed from such composition is below about 85,000 psi (580 MPa) at 50 % relative humidity. Preferably, the modified polyolefin further comprises vinyl acetate.
Abstract:
The present invention relates to foam compositions which are expanded with hydrohalocarbon blowing agents in the presence of catalysts which are capable of decreasing the amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during the polymerization. Thus, the present invention provides compositions comprising polyisocyanate, polyol, hydrohalocarbon blowing agent, surfactant, and catalyst for polymerization of the polyisocyanate and polyol wherein the catalyst is capable of decreasing the amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during polymerization of the polyisocyanate and the polyol.
Abstract:
An internally illuminated panel (10) is provided with a recess (28) in which a conventional knob (12) of translucent construction is mounted. The recess (28) is covered with an opaque material (34), except for an area that allows light to be transmitted to the knob (12).
Abstract:
A system and method of controlling pressure in a wheel brake cylinder (56) of a brake. The hydraulic cylinder is connected to an electrically driven pump (12) and a flow control valve (50, 50', 100) is connected between the pump and the wheel cylinder. The system and method operate to control the speed of a motor driven pump to generate a desired pressure in a cylinder of the brake; generate a differential pressure, in the flow control valve, proportional to pump flow and communication same to a spring biased valving element; cause the valving element to move, in response to pressure forces acting on the valving element, generated by the pressure differential, and the force of the bias spring, so as to selectively open and close an associated exhaust port, connected to a drain or sump, such that in the steady state an equilibrium condition is achieved where the pressure forces balance the spring force and the pressure in the hydraulic cylinder is constant.
Abstract:
Polymer precursor formulations suitable for stereolithography may be prepared from compositions containing vinyl ether functionalized compounds and epoxy functionalized compounds plus an effective amount of a cationic photoinitiator.
Abstract:
A method of evaluating the operational characteristics of a brake booster by simulating a brake application of partially assembled brake booster components. An input force to control valve located in a hub of a shell to create an output force which is communicated through a reaction disc to a output member. An initial operational curve corresponding to an output force is compared with a reference curve to either accept or reject the partially assembled brake booster components. If accepted, additional components are joined to the partially assembled booster to complete the assembly. If rejected, spacers based on the operational characteristics of the reactions disc and initial operational curve are located adjacent the reaction disc to modify the communication of a pressure differential developed force to the reaction disc for the now modified partially assembled brake booster components. An input force is again applied to the control valve to simulate a second brake application. The pressure differential developed force is communicated through the spacers to produce a second operational force. A curve corresponding to the second operational force is compared with the reference curve to inform an operator to either accept or reject the modified partially assembled brake booster components. If accepted, additional components are thereafter joined to the modified partially assembled brake booster components to complete the assembly. If rejected, the modified partially assembled brake booster components are removed from the assembly line.
Abstract:
R12, which contains chlorine, and hydrogen-contributing lubricants react to form acids such as hydrogen chloride and hydrogen fluoride and simultaneously, R12 is converted to R22. Such reactions are undesirable because the acids which form destroy the metallic components of a refrigeration system and cause the breakdown of the lubricants. The present invention provides a compositions for use in compression refrigeration and air-conditioning which substantially reduce the occurrence of the foregoing problem. The compositions comprise: (a) chlorine-containing refrigerant selected from the group consisting of hydrochlorocarbons, (b) hydrogen-contributing lubricant; and (c) composition comprising: (1) at least one phenol and (2) at least one aromatic epoxide or fluorinated alkyl epoxide wherein the composition (c) substantially reduces the removal of chlorine or chlorine and fluorine from the chlorine-containing refrigerant (a) and replacement of the halogen with hydrogen from the hydrogen-contributing lubricant (b).