Molded polyurethane articles are made by reacting polyisocyanates with polyol compositions obtained by chemical decomposition of polyurethane and/or polyurea waste in a mold. The polyol compositions employed in this invention have an OH value of from about 100 to about 500 mg KOH/g a water content of from 0 to about 5 wt.% and a viscosity at 20.degree.C of more than 2 000 mPa~s. These molded polyu...

An aqueous dispersion of small particles of a phenol/formaldehyde novolac resin, referred to as a dispersed novolac resin, useful for example as a binder in preparing glass fiber insulation. The dispersed novolac resin is produced by preparing a molten novolac resin, cooling, adding water and optionally a surfact ant and then adding a protective colloid. Additional water is added to provide the de...

A mulching mower is provided for mowing and mulching turf vegetation in order to reduce the size of the cut vegetation and more evenly distribute the vegetation once thus cut. Counterrotating, coaxial blade and mulching tool assemblies are provided. Each blade assembly is driven by a central shaft rotatably mounted through a drive barrel which drives the mulching tool. A belt drive assembly transl...

A rotary heat exchanger is used for transferring heat between two fluid flows. The exchanger includes a slide-out frame and lift-out, sectioned venturi collars that provide easy access to the component of the apparatus for servicing. A perimeter seal mounted on the rotor using a spacer and a releasable fastener strip provides long wear and good sealing regardless of rotor run-out. Two wiper seals ...

A production plant for rolling hot strip from slabs produced by continuous casting, wherein a shearing machine is arranged following a continuous casting plant of the casting machine and in front of an equalizing furnace, and an additional shearing machine and a descaling unit are arranged following the equalizing furnace and in front of a rolling mill, and wherein a heating or cooling unit and a ...

A flexible strain relief device having a center through aperture for receiving cable end portions to be installed into a carrier. The strain relief device has a solid cone shaped portion and a rectangular portion constructed of flexible material having self-extinguishing properties. The rectangular portion is configured to permanently bond to a nut adapter. The perimeter defining the through apert...

Device to control the rate of flow for valves that mix hot and cold water, the valves comprising a cartridge body (15) with a cylindrical upper neck (18) and incorporating valve means consisting of small superimposed plates, of which at least one small plate is stationary in the cartridge body (15), whereas the other small plate can be displaced on the stationary plate by an operating lever (16) p...

Bone fusion dental implant of the type able to form an artificial dental root as a support for a fixed prosthesis composed of one or more dental crowns, said implant being inserted into the bone of the upper or lower jaw by drilling a hole at a suitable location and to which implant the surrounding bone tissue fuses permanently as it grows, said implant also having a substantially cylindrical shap...

The interior surfaces of an ion trap or ionization chamber is coated with an inert, inorganic non-metallic insulator or semiconductor material for the passivati on of such surfaces so as to minimize absorption, degradation or decomposition of a sam ple in contact with the surface.; The interior surfaces of an ion trap or ionization chamber is coated with an ine rt, inorganic non-metallic insulato...

A device for generating light with the aid of a semiconducting material consisting of two electrically conducting contact layers and at least one layer, arranged therebetween, of semiconducting material which comprises a light-emitting semiconducting layer which is divided into at least two permanently parallel-connected sub-regions, delimited by semiconducting material with a higher energy gap th...