41results about How to "Increase the effective section" patented technology

Bases are disclosed that comprise a projecting portion designed to receive over it the hollow end of a pole or other elongate member, which may form part of a structure such as a pavilion or umbrella. The projecting portion of the base comprises wedges that move in response to the end of the pole moving over the projecting portion and in so moving, the wedges increase the effective cross section of the projecting portion to engage the inner surface of the end of the pole and to thereby stabilize the structure on a support surface, such as the ground. Braces are also disclosed that pull together adjacent poles of a pavilion to make the structure more rigid.

A hydraulic cylinder includes a housing having a fluid connection for connecting to a hydraulic system and an after-running connection for connecting to a fluid after-running vessel, and a piston which is axially displaceable in the housing to define a variable pressure space having a gas collecting portion, the piston being fixed against rotation in the housing and having at least one after-running groove which is oriented substantially toward the gas collecting portion. A primary seal arranged in the housing and receiving the piston therethrough is bridged by the after-running groove when the piston is in an extended end position, whereby the gas collecting portion of the pressure space communicates with the after-running connection when the piston is in the extended end position.

Vibration damper comprising a cylinder in which a piston rod is guided with freedom of axial movement, where the piston rod cooperates with a piston arrangement comprising a first, stationary piston and at least one additional piston, which is supported on the piston rod with freedom of axial movement against the elastic force of at least one restoring spring, where the cylinder is divided by the stationary piston and by the minimum of one axially movable piston into a working space on the side of the piston facing the piston rod, a working space on the side of the piston facing away from the piston rod, and a working space between the two pistons, where valve-equipped through-openings control a connection between the working spaces, and where the axial movement of the minimum of one axially movable piston is limited by a hydraulic pressure stop.

The present invention relates to a pretension prestress composite beam prefabricated component having gaps and corbels. The pretension prestress composite beam prefabricated component comprises a composite beam prefabricated component main body portion, wherein a plurality of gaps are arranged on the composite beam prefabricated component main body portion, and the bottom of each gap is provided with a corbel. The pretension prestress composite beam prefabricated component having gaps and corbels in the present invention is applicable for a frame beam in a composite secondary beam shelved prefabricated integral casting system, and has characteristics of convenient construction, safe and reliable structure, effective transfer of carried construction load, and the like.

The invention discloses a three-sided silicified gate metallic oxide semiconductor field effect transistor and a preparation method thereof, belonging to the technical field of manufacturing a semiconductor apparatus. The invention comprises preparations of a low-gate resistance metallic oxide semiconductor field effect transistor and a transverse double-diffused metallic oxide semiconductor field effect transistor with three-sided silicon gate metallic silicide structures. In the method, by adopting the masking effect of a gate dielectric layer reserved after being etched by a polysilicon gate, the three-sided silicified gate metallic silicide structures are formed on the upper surface of the polysilicon gate and the source terminal side and the drain terminal side opposite to the polysilicon gate, a source-region metallic silicide is formed on the surface of a heavily doped source region, and a drain-region metallic silicide is formed on the surface of a heavily doped drain region. In the invention, the silicide can be formed on the surfaces of the gate, thus increasing the effective section of grid current, providing basis for continuously reducing characteristic dimensions of the apparatus, and obtaining lower gate resistance and better apparatus performances on the premise of non-sacrificial breakdown voltage of the apparatus.

The invention provides an integrated transformer, which comprises a plurality of stacked metal layers, each metal layer is provided with a coil; a plurality of dielectric layers, each dielectric layer is located between two adjacent metal layers, and each dielectric layer is provided with a through hole ; The input ends of the coils in two adjacent metal layers are connected through the through holes corresponding to the input ends in the medium layer, and the output ends of the coils in the adjacent two metal layers are connected through the through holes corresponding to the output ends in the medium layer; In the invention, a dielectric layer is provided between the metal layer and a through hole is provided on the dielectric layer, and the coils of the metal layer are connected through corresponding through holes, so that only a through hole needs to be provided on the dielectric layer between the metal layers. It can be connected, and the current flow can be realized without complete bonding between the metal layers, which greatly reduces the influence of the skin effect and increases the effective cross-section of each metal layer. By increasing the number of metal layers, it can be extremely The total effective cross-section of the integrated transformer current is greatly increased, thereby effectively improving the performance of the integrated transformer.

The present invention relates to a method of preparing hybrid organo / mineral nanoparticles comprising an organic fluorescent crystalline core encapsulated in an inorganic shell, and to nanoparticles that can be obtained by said method. The method of the present invention comprises the following steps: (i) a sol-gel mixture able to be obtained by a process comprising the addition, in at least one organic solvent, in the presence of water, of a fluorescent organic compound and at least one metal alkoxide is sprayed; (ii) the sprayed sol-gel mixture is dried, by evaporating the solvent and the water that are present in the sol-gel mixture. The nanoparticles of the present invention can be used for example as a tracer in medical imaging or as a chemical sensor.

The invention discloses a grounding method for low voltage work. The method includes: sleeving ground wire copper terminals at the multi-branch end of a short circuit ground wire by the small end of a ground head of a nut ground post; connecting a connecting post and the ground post to form a conductor end; connecting one ground wire clamp end of the short circuit ground wire to a device ground member; checking that a low-voltage device bears no voltage, and fastening the nut ground post to a bolt of one phase bus or conductor of the low-voltage device with a special insulating operating bar; sleeving a nut of the nut ground post with a socket of the special insulating operating bar, tightening the nut, and tightening the connecting post and ground head of the nut ground post. Special nut ground posts of different specifications can be connected with the bus bar or conductor bolt of the low-voltage electrical device in a fastened manner, connecting is firm, contact section is even, effective section is maximized, and reliability is high.

The invention relates to a movable medium-wave cage antenna. An antenna mast is tensioned by pull ropes to be erected on the ground, a bottom plate and a grounding grid rack at the bottom of the antenna mast are grounded, and the top of the antenna mast is connected with an antenna oscillator through folding and unfolding of an umbrella framework. The cage antenna is convenient and quick to install and use and suitable for being used in emergencies. The antenna oscillator is of a hexagonal structure, and is large in effective section, wide in frequency band and high in efficiency. The antenna oscillator, radiating cables and feeder clamps form a centrosymmetric cage shape of a vertical structure, the height of the antenna is effectively reduced, the bandwidth and the windward area of the antenna are increased, wind resistance is little, stability is high, and influences on a directional diagram of the antenna are small.

The invention discloses a continuous casting device and a continuous casting method of a large-section round billet. The device comprises an inner crystallizer, an outer crystallizer, an upper cover mechanism, a base mechanism, a cylindrical ingot guider with a solid round section, a tundish with a heating function and a cast flow distributor, wherein the base mechanism and the inner part of the upper cover mechanism are communicated with each other and fixed from top to bottom; the outer crystallizer is fixed below the base mechanism; the inner crystallizer is of an inverted arrow-shaped structure and is fixedly connected to the upper cover mechanism; the lower side of the inner crystallizer is inserted into the upper cover mechanism and the base mechanism, so that the lower part of the inner crystallizer is arranged at the inner side of the outer crystallizer and concentrically surrounded by the outer crystallizer; the cast flow distributor distributes metal solution in the tundish into one or more paths and guides the metal solution into the upper cover mechanism; the metal solution is filled between the inner crystallizer and the outer crystallizer; in the primary stage of casting, the cylindrical ingot guider is arranged at the bottom of a round cavity below the outer crystallizer; the metal solution is cooled by the inner crystallizer and the outer crystallizer to form a solidified round billet; and the round billet is arranged on the cylindrical ingot guider.