Abstract: A cordless roller blind includes a roller tube, a blind fabric wound around the roller tube, and at least one brake device. A coil spring is arranged in the roller tube, and the torsion of the coil spring changes as the roller tube rotates. The torsion force of the coil spring, the friction force provided by the brake device and the weight of a hanging portion of the blind fabric are mutually balanced, so that the blind fabric remains stationary at any position without an external force. When the external force pushes the blind fabric to move upward, pressure acting on the brake device decreases as the external force offsets the weight of the blind fabric, and the friction decreases accordingly, and the torsion force of the coil spring drives the blind fabric to wind up.

Abstract: A roller shutter which is convenient to mount, comprising a roller shutter body (1) with a rolling pipe (2), wherein a positioning sleeve (41) embedded in the rolling pipe (2) and a retractable fixing assembly (4) located in the positioning sleeve are arranged on at least one end of the roller shutter body (1); the positioning sleeve (41) is fixedly connected to the rolling pipe (2); the positioning sleeve (41) and the retractable fixing assembly (4) can rotate in a relative manner; and the retractable fixing assembly (4) comprises a self-locking retractable mechanism and a retaining plug assembly for bearing against a wall surface to increase a friction force. The roller shutter is convenient to mount and dismount, and the distance between fixed points at two sides of the roller shutter can be adjusted according to the width of a window.

Abstract: A cordless roller blind includes a roller tube, a blind fabric wound around the roller tube, and at least one brake device. A coil spring is arranged in the roller tube, and the torsion of the coil spring changes as the roller tube rotates. The torsion force of the coil spring, the friction force provided by the brake device and the weight of a hanging portion of the blind fabric are mutually balanced, so that the blind fabric remains stationary at any position without an external force. When the external force pushes the blind fabric to move upward, pressure acting on the brake device decreases as the external force offsets the weight of the blind fabric, and the friction decreases accordingly, and the torsion force of the coil spring drives the blind fabric to wind up.

Abstract: A roller shutter which is convenient to mount, comprising a roller shutter body (1) with a rolling pipe (2), wherein a positioning sleeve (41) embedded in the rolling pipe (2) and a retractable fixing assembly (4) located in the positioning sleeve are arranged on at least one end of the roller shutter body (1); the positioning sleeve (41) is fixedly connected to the rolling pipe (2); the positioning sleeve (41) and the retractable fixing assembly (4) can rotate in a relative manner; and the retractable fixing assembly (4) comprises a self-locking retractable mechanism and a retaining plug assembly for bearing against a wall surface to increase a friction force. The roller shutter is convenient to mount and dismount, and the distance between fixed points at two sides of the roller shutter can be adjusted according to the width of a window.

Abstract: An additive gel for fuels that reduces the soot content in lubricating oil and/or emission in an engine. Further a process employing an additive gel for fuel in a fuel system to decrease the amount of soot in the lubricating oil of an engine and/or decrease the emissions from an engine.

Abstract: An additive composition comprises (A) an additive comprising a nitrogen-containing detergent, a fatty acid based friction modifier, or a mixture thereof and (B) a solid organic matrix material where the additive composition is a solid that melts in the range of about 25 to about 200° C. A method to enhance performance of a functional fluid, especially a fuel composition or power transmission fluid of a vehicle powered by an internal combustion engine, comprises adding a performance-enhancing amount of the additive composition to the functional fluid.

Abstract: In accordance with the present invention, it has been discovered that additive gels can provide additives to a functional fluid over time. In accordance with the present invention it has been discovered that an additive gel comprising i.) at least two additives selected from the group comprising detergents, dispersants, acids, bases, over based detergent, succinated polyolefins or mixtures thereof wherein the selected additives when combined form a gel; ii.

Abstract: A lubricant additive gel formed by the gellation of two or more lubricant additives for the slow release of the additive components into a fluid. The lubricant additive gel slowly releases into its component lubricant additives when contacted with the fluid such as an oil thereby serving as a lubricant fluid such as an oil thereby.

Abstract: Optimizing an “improper” combination, a combination consisting of an even plate or shell and a conceptually irregular set of reinforcing stiffeners, enables to attain said combination's hitherto unknown unique synergetic attribute, the attribute of total disappearance of local buckling phenomena of said combination when compressing thereof up to destruction of structural material(s) thereof, and therefore enables to utilize strength potentialities of the material per se utterly, just us utterly as when stretching thereof, and besides irrespective of plates/shells shape and size, irrespective of structural materials' kind, volume and weight, and irrespective of operational temperatures and type of external load distribution, etc.

Abstract: A floral foam which contains nutrients an preservatives for cut flowers is described, which floral foam has been pre-injected with nutrients and preservatives in an amount of 8-12 g per dm.sup.3 water which can be absorbed by the foam. A method for the production of such a floral foam is also described. The floral foam is pre-injected with 10-30 ml of a solution containing nutrients and preservatives per dm.sup.3 water which can be absorbed by the floral foam.