122results about How to "High mechanical stress" patented technology

A structure and method of manufacture for an improved multi-chip semiconductor package that reduces package resistance to a negligible level, and offers superior thermal performance. Housing of multiple dies is facilitated by providing electrically isolated lead frames that are separated from a common base carrier by a non-conductive layer of laminating material. A silicon die is attached inside a cavity formed in each lead frame. Direct connection of the active surface of the silicon die to the printed circuit board is then made by an array of solder bumps that is distributed across the surface of each die as well as the edges of the lead frame adjacent to each die.

In an impeller for centrifugal compressors comprising a plurality of blades each having a base end attached to a central hub, each of the blades is given with a thickness which increases progressively toward a hub end thereof, and a suction surface side of the blade is given with a greater thickness increase rate with respect to a neutral plane than a pressure surface side of the blade. Thereby, the inter-blade channel is narrowed locally in the region near the hub end of the suction surface of each blade, and this locally reduces the aerodynamic loading on the blade. In particular, the surge property is improved, and the generation of radially outwardly directed secondary flows can be minimized. This allows the distribution of aerodynamic loading in the radial direction or from the tip end to the hub end of each blade to be controlled at will, and enables the optimum design of the impeller.

A method for monitoring at least the bending strain of at least one electric cable provided with at least one peripheral mechanically non-symmetric strength member is provided.

The invention relates to a closing assembly for closing the gap remaining between the first and the last blade of a blade ring that is inserted in a peripheral groove of a turbo machinery, said assembly consisting of at least two lateral parts, at least one of which can be hooked onto a projection that forms an undercut in said peripheral groove and at least one securing element, which secures the parts from coming detached from the peripheral groove. To provide a particularly reliable closing assembly, the securing element is configured as a pin, joining the parts of the closing assembly in a non-positive fit.

Double-sided adhesive tape (fixer) which can be re-released without residue or destruction for hidden bonding on substrate that are to be bonded, with high peel strength, high shear strength and high tip-shear strength, characterized by a) an intermediate support which cleaves under the action of torsional forces, lever forces and/or peel forces, b) pressure-sensitive adhesive composition coated on both sides of the intermediate support, which composition can be released without residue or destruction by stretching in the direction of the bond plane.

There is provided a rotor for a turbo/drag vacuum pump, the rotor comprising an upstream rotor segment of the turbine type made of metal or alloy, and a downstream rotor segment of Holweck type made of composite material. The downstream segment of the rotor has a reinforcing structure made of long fibers that are distributed in a manner that varies as a function of the section under consideration: in the annular connection region connected to the upstream segment of the rotor, the fibers are inclined and/or spaced apart in order to conserve sufficient flexibility for the composite material to enable it to deform so as to track deformation of the metal of the upstream rotor segment while it is in operation; in contrast, the fibers are close together and form turns that touch in the downstream region of the skirt, thereby guaranteeing greater stiffness in order to withstand the mechanical stresses that occur during high-speed rotation of the rotor in operation. It is thus possible to make a rotor with a Holweck type skirt that is of greater diameter, thereby improving the properties of the pump.

The invention relates to a method for producing injection-molded cards with at least one decorative layer (2, 6) which is already applied to a foil (1, 7) or an inlay before injection molding. To protect the inks used for the decoration from thermal action and/or excessive pressures and/or high mechanical stress during injection molding, the decorative layer (2, 6) is covered according to the invention with a protective layer (3, 5) before the foil (1, 7) provided with the decoration or an inlay provided with a decoration is inserted into the injection mold.

The invention discloses an anti-static, anti-corrosion, waterproof and stretching-resistant insulated cable. The anti-static, anti-corrosion, waterproof and stretching-resistant insulated cable comprises a cable body. The cable body comprises cable cores, a cable core protective layer, an insulating layer, a shielding layer and an outer jacket. The cross section of the cable core protective layer is of a circular structure, and the multiple evenly-arranged cable cores are arranged in the cable core protective layer and separated through PVC plastic connecting rods; a plurality of current guide cores are arranged outside the cable core protective layer and are tangent with the cable core protective layer; the insulating layer is arranged outside the cable core protective layer; waterproof fillers are arranged in a gap between the insulating layer and the cable core protective layer; the shielding layer is tightly extruded on the insulating layer and internally provided with the multiple evenly-arranged current guide cores; a breakdown resistant layer, a steel core protective layer and a waterproof layer are sequentially extruded on the shielding layer from inside to outside; an armor layer is extruded outside the waterproof layer, the outer jacket is arranged outside the armor layer, and a graphite layer is arranged between the armor layer and the outer jacket. The anti-static, anti-corrosion, waterproof and stretching-resistant insulated cable has the advantages of being reasonable in structural design, high in anti-static capacity, good in anti-corrosion performance and the like.

An electrophotographic photoreceptor of high durability capable of providing stable excellent electrical characteristics over a prolonged period of time, which electrophotographic photoreceptor excels in mechanical strength. Photosensitive layer (14) of electrophotographic photoreceptor (1) comprises a polyarylate resin having structural units, for example, those of aforementioned formula (1-3) and an enamine compound represented by, for example, aforementioned formula (2-1). By virtue of these, electrophotographic photoreceptor (1) of excellent mechanical strength and favorable electrical characteristics can be realized.

The invention relates to a turbine blade (31) having a root region (33), a tip region (37) and a blade airfoil (35), a rounded portion (73) being formed between the root region (33) and the blade airfoil (35), and relief slots (51) passing through the blade trailing edge (41) in the region of this rounded portion (73), thermal expansions being compensated for and thus thermal stresses being minimized by these relief slots (51).

The invention relates to an endless, belt-shaped tension element (1) for a conveyor system with at least one joining point (2) comprising an elastomer, in particular a cross-linked and/or thermoplastic elastomer, at least one reinforcing layer and optionally at least one tension support (3), two ends of the at least one reinforcing layer being disposed at the at least one joining point (2). An insert piece (6) is disposed between the two ends at the joining point (2), subtending an angle α with the tension element longitudinal extension, and the ends of the at least one reinforcing layer overlap with the insert piece (6).

The invention proposes a metallic push-pull connector for use in harsh and moist industrial environments that is provided with a sliding sleeve and features an interlocking device that causes the connector to be interlocked with a mating connector during the installation process, wherein the interlocking hooks of the interlocking device are levered out of snap-in depressions in the mating connector by means of a wedge-shaped slope when the sliding sleeve is pulled back.

A power-generating unit for a tire sensor module of a vehicle tire has: a piezoelectric element, which is displaceable between a first stable bent position and a second stable bent position and outputs a piezoelectric voltage upon the displacement between the stable bent positions, and a restoring unit for the mechanical displacement of the piezoelectric element from the first stable bent position into the second stable bent position, the restoring unit being activatable by a deformation acting on the power-generating unit, e.g., in a deformed tire area of the vehicle tire above its tire contact patch. The piezoelectric element is clamped in receptacles at its end areas and has two oppositely arched stable bent positions having unstable intermediate states.

A sintered fuel pellet for a water nuclear reactor fuel rod including a peripheral wall extending along a central axis and two end faces. At least one of the end faces includes at least a first chamfer extending from the peripheral wall towards the central axis with a first non-zero slope with respect to a plane perpendicular to the central axis and a second chamfer extending from the first chamfer towards the central axis with a second non-zero slope with respect to a plane perpendicular to the central axis, wherein the first slope is different from the second slope.

The invention provides a perovskite material, an application thereof on a solar cell and a preparation method of the solar cell. The preparation method comprises the steps of dissolving a precursor material of methyl ammonium iodide, lead iodide, tin iodide or copper bromide or a precursor material of methyl ammonium iodide, lead iodide and copper bromide into a mixed solvent of gamma-butyrolactone and dimethyl sulfoxide to prepare a perovskite solution; using TiO2 prepared at a low temperature to serve as a cathode transmission layer; processing the ternary lead-tin-copper perovskite solutionto the cathode transmission layer, and then processing 2,2',7,7'-tetra[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene to a junction light sensing layer to obtain a hole transport layer; and thendepositing an anode electrode so as to obtain an efficient and environment-friendly perovskite solar cell. The obtained perovskite solar cell is high in energy conversion efficiency, environment-friendly, simple in process and good in perovskite crystal characteristic.

A microelectronic package includes larger diameter solder bumps and smaller diameter solder bumps for coupling an interposer to a packaging substrate. The larger diameter solder bumps are positioned on a peripheral surface of the interposer and the smaller diameter solder bumps are positioned on a center surface of the interposer. The solder bumps positioned in the peripheral region can more reliably withstand the higher mechanical stresses that occur in this peripheral region during operation of the microelectronic package.

Mechanical stresses of the membrane of a fuel cell can be reduced by virtue of the fact that the supply of feed gas to a gas chamber of the fuel cell takes places, initially, by means of a first pressure increasing speed and then by means of a second pressure increasing speed. The first pressure increasing speed is slower than the second pressure increasing speed. Pressure surges are prevented in the membrane due to the lower pressure increasing speed in the first phase of the gas supply, and as a result, the life span of the membrane is increased.

A sensor device is for measuring forces applied to an object to be sensed. The sensor device, includes a magnetic field generating element, a magnetic field sensing element, a driving unit being adapted to drive the magnetic field generating element with a first and second driving signal having a first and second frequency, and an evaluation unit. The sensor device is able of compensating a hysteresis of the object to be sensed.

The invention relates to a method for producing a nanostructured substrate comprising an array of protruding nanostructures, in particular nano-pilalrs, which method comprises at least the following steps: a) providing a primary substrate; b) depositing at least one layer of a material capable to be removed by means of reactive ion etching (RIE) onto said primary substrate which layer comprises apredetermined gradient of its thickness; c) depositing a nanostructured etching mask onto the graded layer deposited in step b); d) generating protruding structures, in particular nanopillars, in thegraded layer deposited in step b) by means of reactive ion etching (RIE), wherein simultaneously at least 2, preferably 3, predetermined continuous gradients of geometric parameters of the protrudingstructures are generated on the same substrate- More specifically, the geometric parameters are selected from the group comprising the height, diameter and spacing - of the protruding nanostructures.A further aspect of the invention relates to a nanostructured substrate comprising an array of protruding nanostructures obtainable by the method as outlined above. In a preferred embodiment of said nanostructured substrate, each of the protruding nanostructures simultaneously represents an element of 3 continuous gradients of the height, diameter and spacing of said protruding nanostructures.