The invention relates to the field of high temperature composites made by the chemical vapor infiltration and deposition of a binding matrix within a porous structure. More particularly, the invention relates to pressure gradient processes for forcing infiltration of a reactant gas into a porous structure, apparatus for carrying out those processes, and the resulting products. The invention is par...

The system uses principal radial tubes 4 which connect an inner, central arc 3 to an outer arc 2. A plurality of branches 5 emerge from these tubes 4 and then assume a radial geometry, forming secondary radial tubes which extend as far as the said outer arc 2. The system rests freely on the bottom of the tank.

The system uses principal radial tubes 4 which connect an inner, central arc 3 to an outer arc 2. A plurality of branches 5 emerge from these tubes 4 and then assume a radial geometry, forming secondary radial tubes which extend as far as the said outer arc 2. The system rests freely on the bottom of the tank.

Crimper. There is provided between the two strands of each conveyor (17, 17') of a pair of conveyors a sealed box (22, 22'), of which one large face arranged substantially in contact with a working strand of this conveyor is formed from a perforated rigid plate (23, 23'). Means (26, 26') are provided for feeding compressed air into each box (22, 22'). This air, escaping by way of the perforat...

A method of spin cleaning a substrate applying a carbon dioxide liquid to a surface portion of a substrate, rotating the substrate about an axis to distribute the carbon dioxide liquid on the substrate, and cleaning the substrate by virtue of applying the carbon dioxide liquid to the substrate.

Wafer contact electrode assemblies (24) useful for supporting a wafer surface to be electroplated are disclosed herein. These fingers (235) provide electrical contact necessary for providing electric power between the wafer (55) and a corresponding anode in order to electroplate the surface wall of the wafer (55). Such conductive fingers (235) are useful in the production of electroplated products...

PURPOSE:To improve the safety and to obtain a larger output by forming the lid opening mechanism of a gas cavity container at the upper side of a void aggregate with a shape memory alloy. CONSTITUTION:When the flow of the cooling material of an atomic reactor is reduced abnormally, the flow of the cooling material 5 flowing in to the inside of a void aggregate 33 is also reduced. As a result, the ...

PURPOSE:To prevent saddle shape electromagnetic force generated upon the extinction of plasma, reduce thermal stress generated during a temperature rise and fall, assure one turn resistance in a torus and ascertain shielding. CONSTITUTION:The inner wall 2 and the outer wall 3 are constituted with thin plates and a shielding plate 7 is connected to one side of ribs 4 connecting the inner and outer ...

PURPOSE:To provide a solid electrolytic fuel cell stack capable of effectively utilizing a heat in the inner part. CONSTITUTION:An air preheater 16 and a fuel gas preheater 18 of double pipe structure are provided in a stack. Low temperature air before generation is sent to one side of the double pipe of the air preheater 16, and either one of high temperature air and fuel gas after generation to ...

PURPOSE:To provide a solid electrolytic fuel cell stack having an air preheater and a fuel gas preheater of double pipe structure in which thermal stress can be suppressed at minimum, and high thermal efficiency can be obtained. CONSTITUTION:The inner pipes 16a, 18a and outer pipes 16b, 18b of an air preheater 16 and a fuel gas preheater 18 of double pipe structure to be provided in a stack are fo...

The purpose of this invention is to provide an image display unit which is capable of displaying an environmental image at the periphery of an image on a display screen in order to create an image having heightened reality and to provide greater comfort to the eyes. The image display unit comprises a liquid-crystal display (24) for displaying a main image at a central portion of a visual field, a ...

PURPOSE:To improve volumetric efficiency of electrode cluster and attain good sealing effect by forming a raised step portion near the opening end of an outer can in which electrode cluster is housed, fitting and securing by caulking a sealing cap over the can by way of a frame-like insulation sealing cap. CONSTITUTION:An electrode cluster 2 sandwiched between a lower insulation plate 3 and an upp...

PURPOSE:To drastically lower the percentage of voids of the inside walls of a concrete building for storing a fusion reactor, etc., and to drastically lower water permeability by constituting the inner side of the concrete building of polymer cement concrete. CONSTITUTION:The polymer cement concrete is used as the material for preventing the permeation of tritium on the inner side of the concrete ...

A braking device for wheels of vehicles such as trailers includes a caliper in which brake linings are guided. Between these linings, at least one brake disk is displaceably held on driving toothing of a wheel hub. A pneumatically operable mechanical adjusting device interacts with the brake linings. The braking device includes at least one brake disk in a caliper which is fixed. On one end, the c...

An assymetric microporous hollow fibre for hemodialysis is composed of 90-99% by weight of a first, hydrophobic polymer and 10-1% by weight of a second, hydrophilic polymer having a water uptake capacity of 3-10%, and is produced by precipitating an extruded solution of 12- 20% by weight of first polymer, 2-10% by weight of second polymer and a remainder of solvent from in to out while at the same...

A cooling device (1), for extrusion heads (4) for tubular film (8) of plastic material, can be constructed in two versions, each having the dual purposes of cooling a tubular film and at the same time giving it as uniform a thickness as possible. The first embodiment comprises a set of keys (25) which when operated by means of actuators (26) cause a ring of elastic material to bend, which locally ...

A process for the continuous preparation of a thermoplastic molding composition with narrow scatter of the melt flow index, which comprises mixing two or more chemically identical starting materials of different melt flow index in a pelletizing extruder fitted with an on-line melt flow index meter and adjustable metering systems.