78results about How to "Different strength" patented technology

An exerciser includes a flywheel rotatably attached onto a frame and coupled to a pair of foot pedals with a transmission device, an arch having one end rotatably coupled to the frame, one or more magnetic members attached to the arch and moveable toward or away from the flywheel, to adjust the magnetic retarding force to the flywheel. A brake shoe is attached to the other end of the arch, and movable to engage with and to brake the flywheel. A spring may bias the arch and the brake shoe away from the flywheel, to allow the brake shoe to be moved toward and against the flywheel and to brake the flywheel selectively. An actuating device may force the brake shoe of the arch to engage with and to brake the flywheel.

Multi-layer bags may be formed to include first and second sidewalls joined along a first side edge, an opposite second side edge, and a closed bottom edge. The first and second layers may be non-continuously laminated together in discrete sections to include bonded regions in which the layers are bonded and unbonded regions in which the layers are not bonded. Such a bag may be described as a “bag-in-a-bag” type configuration in which the inner bag is non-continuously bonded to the outer bag. The inventors have surprisingly found that such configurations of non-continuous bonding provides increased and unexpected strength properties to the multi-layer films and bags.

A method for manufacturing a PU (polyurethane) polishing pad is provided. Resins containing active hydrogen functional groups such as polyol resins, polyamine resins, and polythiol resins, and polyisocyanate resins containing -NCO functional groups are mixed to form a foamed PU polishing pad with excellent polishing properties by reaction injection-molding under high pressure, low temperature and auxiliary gas-adding. The PU polishing pad in accompany with an abrasive slurry can be widely used to polish high-level products such as wafers and optical glass.

The invention relates to a surgical nail in the form of an intramedullary nail with a central axis made from a material M with a tensile strength F_z, compressive strength F_d, density ρ₂ and modulus of elasticity E. Said nail has a transverse bore extending transversely to the central axis and having a cross-sectional profile F and a transverse axis, the cross-sectional profile F having a maximum length a that runs in the direction of the central axis and a maximum width b that runs perpendicular to the length. An insert with the longitudinal axis, made from material m and having a modulus of elasticity e that is smaller than the modulus of elasticity E of material M, can be introduced into the transverse bore. The insert also has a length L that runs in the direction of its longitudinal axis and satisfies the condition L>0.2 D.

An impact absorbing device for a vehicle uses a shape memory material that can be heated to repair deformation from a relatively low speed, low energy impact and its stroking force and energy absorption can be tuned by heating. The shape memory material is suitably used in a crash box having an inserted impact absorbing ram, the box being placed, for example, between a bumper and strong body member. The shape memory material is attached to the box and ram for absorbing energy as the ram is driven into the box. Heating means is provided to repair or tune the shape memory material.

The invention provides 800-1,600 MPa grade high strength austenitic stainless steel, manufacturing method and a warm forming method. The austenitic stainless steel comprises steel chemical components in weight of 0.04%-0.14% of C, 0.2%-0.6% of Si, 2%-12% of Mn, 12%-18% of Cr, 0.5%-6.5% of Ni, less than or equal to 0.03% of P, less than or equal to 0.02% of S, 0.05%-0.25% of N, 0%-2% of Cu, one or more of Mo, Nb and Ti and the balance of Fe and inevitable impurities, and the condition that W(Ni)eq is larger than or equal to 20.5 and smaller than or equal to 25.5 is required to be met. The high strength austenitic stainless steel is obtained by controlling the rolling reduction to be 10%-40% in a rolling process, the tensile resistance is 800-1,600 MPa, and the extension is 13%-40%. At the same time, with the warm forming method, ultra-complex formed high strength stainless steel parts can be obtained, and the high strength austenitic stainless steel has excellent corrosion resistance, high strength and delayed cracking resistance.

The present invention relates to a damping apparatus for moving furniture parts, for example doors, flaps or drawers. Such a damping apparatus of a compact construction which avoids a possible springing back movement of the furniture parts is provided in accordance with the invention in that the damping apparatus has at least two damping stages each having a cylinder having a piston longitudinally displaceable therein which exert a damping action of different strengths.

A hybrid and telecom-structured image display and projection system implementing a desired image display and projection solution that is fast, cheap to manufacture, low-power, light-weight, scalable in size and resolution, fast-switching and capable of a broad range of mode characteristics of light for implementing dimensional display and projection, flexible, rigid-flat, or rigid-conformal as needed.

A vehicle switch includes a magnet mounted to an operating unit accommodated in an external packaging such that the operating unit can move linearly. A magnetic detector is placed so as to receive different strength of the magnetism from the magnet in the two cases that the operating unit is at the upper limit position and at the lower limit position. A control circuit coupled to the magnetic detector opens and closes a switching device in response to strength of the detected magnetism.

A bumper structure comprise a bumper reinforcement, a bumper fascia extending along and located in front of the bumper reinforcement, and an impact absorber arranged between the bumper reinforcement and the bumper fascia. The bumper reinforcement extends in a lateral direction of a vehicular body and attached to the vehicular body. The bumper reinforcement has a front surface, stepped or tapered in shape, so that the bumper reinforcement retreats at a lower portion thereof more than at an upper portion thereof. The impact absorber has upper and lower portions so that the lower portion thereof is longer and stronger than the upper portion thereof. The impact absorber has a rear surface, stepped or tapered in shape, such that the rear surface of the lower portion projects toward the bumper reinforcement with respect to the rear surface of the upper portion so as to face the front surface of the bumper reinforcement.

The invention discloses a wheat straw powder composite wire for fused deposition modeling and a preparation method and a 3D (Three-dimensional) printing method thereof, and belongs to the technical field of a preparation technology and application of composite materials. At present, a 3D printing technology is in rapid development, but materials suitable for 3D printing are in slow development. The wheat straw powder composite wire for the fused deposition modeling is prepared from the following raw materials in parts by weight: 1 to 5 parts of wheat straw powder, 95 to 99 parts of polylactic acid, 0.02 to 0.4 part of a coupler, 0.5 to 1.5 parts of a compatilizer and 0.2 to 1 part of a lubricant. A product printed by the wheat straw powder composite wire for the fused deposition modeling, disclosed by the invention, has a woodiness feeling, the raw materials of the wheat straw powder and the polylactic acid are completely biodegradable, and any pollution to an environment cannot be caused.

A coring assembly comprises an outer barrel coupled to a coring bit. An inner barrel is disposed within the outer barrel. An inner sleeve is disposed within the inner barrel and includes at least one frangible region that allows the inner sleeve to break so that coring operations can continue after the occurrence of a core jam.

The invention relates to the field of a part forming process, and discloses a selective laser melting forming method of a multi-material part. The method comprises the following steps of S1, part model design, wherein during modeling, materials meeting forming needs are combined to be arranged according to the proper distribution rule, and part model design is finished in an optimized manner; S2,process model obtaining, wherein a designed part model is subjected to size and shape compensation, chamfering, remaining adding, process support design and the like, and a process model is obtained;S3, control file generation, wherein the obtained process model is subjected to layered slicing, the material kind, material distribution and material boundary information contained in each layer areextracted, and a control file guiding an additive manufacturing forming process is generated; S4, additive manufacturing forming; and S5, forming aftertreatment. According to the method, through the selective laser melting forming technology, the high-precision high-quality multi-material part can be formed.

The invention provides a discontinuous long fiber reinforced thermoplastic composite material mold pressing precast body and a preparation method thereof. The mold pressing precast body comprises slices formed by slitting/cutting of continuous fiber reinforced thermoplastic composite material preimpregnated sheets/preimpregnated yarns, wherein the length L range of the slices is 5-200 mm, the width W range of the slices is 2-30 mm, and the weight percentage content of fibers in the slices is 20-90 wt%; and high-strength isotropous complicated parts with high size stability can be prepared through secondary mold pressing of the precast body, so that the defects of easy warpup, fiber length loss, weaker part performances, anisotropic mechanical performances of continuous fiber reinforced composite materials and difficult machining of different-thickness complicated parts after mold pressing injection molding of short-fiber and long-fiber particles are made up.

The present invention relates to an electric massage device capable of gradually increasing a massage force during an outward stroke, mainly comprising a massage module and a control module. In the outward stroke, the control module applies a driving current to the electromagnetic driving unit, and the driving current is gradually increased with an elapsed time or a stroke displacement of the output shaft. In a return stroke, the control module deenergizes the driving current or applies a weak reverse current less than one-fifth of the driving current. At the beginning of the outward stroke, the massage force is weak due to the smaller driving current and hence would not cause skin hurt. At the end of the outward stroke, the massage force is strong due to the greater driving current and hence produces a deep muscle massage effect.

The invention discloses a stress-responsive multi-color-change composite film material. The composite film comprises 50-90 wt% of organic matter and 10-50 wt% of calcium phosphate nanoclusters; and the organic matter comprises polyvinyl alcohol and sodium alginate, wherein a mass ratio of the polyvinyl alcohol to the sodium alginate is (3-9):1. The invention also discloses a method for preparing the stress-responsive multi-color-change composite film material. The method comprises the following steps: (1) using the calcium phosphate nanoclusters as an inorganic unit precursor, sequentially adding the sodium alginate aqueous solution and the polyvinyl alcohol aqueous solution, and preparing the isotropic composite film by an emulsion evaporation induced self-assembly process. The compositefilm provided by the invention exhibits excellent toughness, can be crimped and folded, and has higher mechanical bearing capacity and excellent elasticity; and the composite film has reversible and highly-sensitive color change in an orthogonal polarized light system, and can be used in optical devices, sensors or information storage materials.

Disclosed is a burner for particulate fuel, in particular made of biomass, with a primary tube and a core tube arranged in the primary tube. The primary tube and the core tube form a primary tube gap and the primary tube gap is configured to guide a flow of particulate fuel and gaseous combustion means from an inlet-side end to an outlet-side opening of the primary tube. In order to prevent the drawbacks occurring when using coarse-grain particles, preferably biomass, as a fuel for dust firing, or at least to reduce them without having to accept an increased outlay for equipment and/or additional energy losses, at least one device is provided for centring the flow within the primary tube in the region of the outlet-side end of the primary tube.

The invention particularly relates to a corundum aggregate with a micro-nano-pore structure and a preparation method of the corundum aggregate. According to the technical scheme, the preparation method comprises the following steps of: with 60-82 wt% of alpha-Al2O3 fine powder, 6-15 wt% of alpha-Al2O3 micro powder, 3-15 wt% of rho-Al2O3 fine powder and 5-15 wt% of sillimanite as raw materials, adding 5-50 wt% of foam, 8-35 wt% of water and 0.5-2.5 wt% of burning accelerant in terms of the raw materials, and uniformly mixing to prepare a spherical biscuit; and naturally drying, roasting, heating to 1600-1780 DEG C, and insulating heat for 2-4 hours to obtain the corundum aggregate with the micro-nano-pore structure. The corundum aggregate with the micro-nano-pore structure and the preparation method disclosed by the invention have the advantages of being simple in production process, low in production cost, and energy-saving and environment-friendly; and the prepared corundum aggregate with the micro-nano-pore structure is good in thermal shock resistance, wide in application range, and capable of being used as a lining material for a kiln or a refractory castable for a heavy working layer during steel-making.

The invention relates to an assembly structure of a pulley and a bearing and a method and fixture for manufacturing the assembly structure. The outer ring periphery of the bearing is in interference fit with the inner bore of the pulley. The assembly structure is characterized in that riveted structures are distributed on the end surfaces at the two sides of the inner bore circumference of the pulley; and part of the pulley materials on the riveted structures is extruded into the rounding portion of the outer ring periphery of the bearing. The assembly structure and method radically change the processing and assembling modes of the conventional steel pulleys, the assembly fixture adopted by the invention can synchronously complete the bearing pressing process and double-sided press riveting process of the pulley conveniently, quickly and accurately, and the press rivet points at the two ends can effectively prevent the bearing from moving axially in the inner bore of the pulley, thus greatly lowering the production cost, saving the production time, improving the assembly efficiency, ensuring the product quality and reliability and meeting the requirement of volume production.

The invention relates to a high-heat-resistance copolymerized silicon resin and a preparation method thereof. The preparation method comprises the following steps: catalyzing hydroxyl-terminated linear polysiloxane and organic trichlorosilane to be precondensed by using a weak base compound in an organic solvent medium, then carrying out cohydrolytic condensation under the action of a strong base to obtain a copolymer, and carrying out high-temperature curing on the copolymer to obtain a product with the structural formula of (R1R2ViSiO0.5)a(R1R2SiO)b(R3SiO1.5)c, wherein a+b+c=1, a:c=(3-20):1, b:c=(1-6):1, R1, R2 and R3 are the same or different and are selected from one or more of Me, Ph and Vi, and the number-average molecular weight is 5*10<4>-10<6>. The copolymerized silicon resin not only can keep good physical and mechanical properties, but also has high heat resistance, can be used for a long time at 300 DEG C, and still keeps high strength and high elasticity after being subjected to thermo-oxidative aging for 72 hours in an environment at 350 DEG C.