37results about How to "High degree of symmetry" patented technology

A MEMS device, such as a microphone, uses a perforated plate. The plate comprises an array of holes across the plate area. The plate has an area formed as a grid of polygonal cells, wherein each cell comprises a line of material following a path around the polygon thereby defining an opening in the centre. In one aspect, the line of material forms a path along each side of the polygon which forms a track which extends at least once inwardly from the polygon perimeter towards the centre of the polygon and back outwardly to the polygon perimeter. This defines a meandering hexagon side wall, which functions as a local spring suspension.

A liquid crystal display device of the present invention comprises picture element regions each defined by a first electrode on a first substrate on the liquid crystal layer side and a second electrode provided on a second substrate and opposing the first electrode via the liquid crystal layer. In each picture element region, the first electrode includes openings and a solid portion; and the liquid crystal layer is in a vertical alignment with no voltage, and upon voltage application, forms liquid crystal domains each taking a radially-inclined orientation above the openings and the solid portion by an oblique electric field produced in edge portions of the openings. The solid portion of the first electrode includes unit solid portions and connecting portions each for connecting at least three unit solid portions to one another. The second substrate has a first orientation-regulating structure above each connecting portion for exerting an orientation-regulating force for placing liquid crystal molecules in the liquid crystal layer above the connecting portion into the radially-inclined orientation at least with voltage application.

The invention provides a punching die for an equal-diameter branch of a stainless steel clamping and pressing three-way pipe fitting, and belongs to the technical field of dies. The punching die comprises a lower die base, and a flanging mechanism is connected to the top outer wall of one side of the lower die base through bolts, the top outer wall of the other side of the lower die base is connected with a sliding mechanism through bolts, and a first fixing plate is connected with the top of the sliding mechanism through bolts; and a guide sleeve is welded to the outer wall of the top of thelower die base, and connected with a discharging plate through a guide column, and the top outer wall of the discharging plate is connected with a stamping mechanism through bolts. The punching die has both punching and flanging functions, the machining steps of machined parts are simplified, the equipment requirement is lowered, manpower is reduced, the occupied space of equipment is reduced, safety risks caused by manual feeding are reduced, the working efficiency is greatly improved, and benefits are conveniently improved.

A cost-effective device for influencing the transmission of electrical energy of an alternating voltage line with a plurality of phases has phase modules, which each have an alternating voltage terminal for connecting to a phase of the alternating voltage line and two connecting terminals. A phase module branch extends between each connecting terminal and each alternating voltage terminal. The phase module branch is formed of a series connection of sub-modules, each having a power semiconductor circuit and an energy accumulator connected in parallel to the power semiconductor circuit. The connecting terminals are connected to one another. The power semiconductor circuit is equipped with power semiconductors that can be switched off and are connected to each other in a half bridge.

In order to develop a surgical needle comprising an elongate needle body and a needle point formed on a distal end of the needle body, wherein the needle body is manufactured in particular from an elongate cylindrical blank, in a way that improves the handling ability of the surgical needle, it is proposed that the needle body has at least one textured-profile lateral face, which comprises at least one textured-profile lateral-face region provided with a textured profile, wherein the textured profile comprises a plurality of indentations and wherein the at least one textured-profile lateral-face region extends as far as the needle point. An improved method of manufacturing a surgical needle is further proposed.

The invention provides a miniature blow-molding semispherical resonator gyroscope and a preparation method thereof. The resonator gyroscope comprises a rectangular base with the upper surface, wherein a cylindrical cavity is formed in the center of the base, a semispherical resonator body is arranged over the cylindrical cavity, the edge of the semispherical resonator body is connected to the upper surface of the base by bonding and is in the shape of a two-layer stair so that an electrode wire can be led out, and since the peripheral edge of the semispherical resonator body is connected to the base by bonding, very good stability and very good shock resisting capability are achieved. The technology steps are simple, a common mature micromachining process is adopted, and the resonator gyroscope has high symmetry, thereby being capable of achieving very high performance.

The invention relates to a torque detection unit (100) for actively detecting a torque acting on a shaft (15), and in particular on a crankshaft (15), of a vehicle (1) drivable by muscle power and/or by motor power along a rotational axis (X), including an excitation unit (20), which is designed to apply a magnetic field which changes over time to the shaft (15), and a first sensor unit (30) and a second sensor unit (40), which are designed to detect a magnetic field carried by the shaft (15), the first and the second sensor unit (40), in particular with an otherwise identical setup, having different orientations with respect to one another so that they, during operation, are oriented differently from one another with respect to the shaft (15), and in particular with respect to the rotational axis (X).

The invention relates to a transmission head cover assembly. A gear selecting and shifting mechanism of the assembly comprises four gear shifting thumbing heads. A gear shifting shaft is supported in a top cover shell and sleeved with the four gear shifting thumbing heads. A self-locking block is fixed to the gear shifting shaft. An interlocking plate is provided with a cross-shaped groove and comprises a connection hook. The interlocking plate is connected with the self-locking block through the connection hook. The gear shifting thumbing heads are sleeved with the cross-shaped groove of the interlocking plate. A gear shifting shaft pin is installed on the gear shifting shaft. The two ends of the gear shifting shaft pin are located in inner cavities of the corresponding gear shifting thumbing heads. A first return spring is installed on the gear shifting shaft and located between a baffle and a spacer bush of the top cover shell. A self-lock pin assembly is installed on the top cover shell and comprises a compressed spring and a steel ball. At the neutral gear, the steel ball is located in an axial groove of the self-locking block. When the self-locking block rotates along with the gear shifting shaft to conduct gear shifting, the steel ball of the self-lock pin assembly falls to the outer sides of two axial protrusions. The transmission head cover assembly is accurate in gear shifting and compact in structure, the assembly and maintenance process of a speed change control mechanism is simplified, and cost is reduced.

A shock wave source has a coil carrier, a coil, having a metallic membrane separated from the coil in insulating fashion for generating shock waves. The coil carrier is formed of a material that damps the formation and/or the propagation of audible acoustic waves in the generation of shock waves.

An inner casing (10) of a rotating thermal machine, in particular a steam turbine, has essentially the form of a hollow cylinder and is divided in a parting plane (20), which extends through an axis (11) of said casing, into a lower casing part (12) and an upper casing part (13), which casing parts (12, 13) are detachably connected to one another in the parting plane (20). The thermomechanical properties are improved with respect to casings provided with flanges in that the two casing parts (12, 13) have, in the region of the parting plane (20), two overlapping areas (14, 15) which lie opposite one another and in which the two casing parts (12, 13) overlap one another and are detachably connected to one another with overlapping sections (17, 18), in that the two casing parts (12, 13) have a predefined wall thickness (d), and in that the sum of the thicknesses of the overlapping sections (17, 18) is approximately the same as the wall thickness (d) of the two casing parts (12, 13) in the overlapping areas (14, 15).

Sugars comprising the monosaccharides glucose and fructose, and the disaccharides sucrose and lactose are catalytically converted to polyethers in a sulfate fortified acid medium in the presence of transition metal compounds possessing a degree of symmetry. The conversion efficiency of this catalytic chemical process is improved by saturating the acidic reaction mixture with inorganic sulfate salts to reduce competitive reactions. Polyethers formed during the reaction are removed by filtration facilitating a continuous process.

The invention provides a preparation method of an electrode micro-gyroscope. The preparation method comprises a first device groove forming step, a second device groove forming step, and a support post through hole forming step, wherein the second device groove forming step comprises a mask layer forming step and a resonator groove forming step; the first device groove forming step comprises an electrode groove forming step, a metal layer formation step and a surplus metal removal step. The method provided by the invention is simple in steps, adopts a mature micro-mechanical processing technology and an etching method, and is beneficial to mass production. A nickel electrode side-driven hemispheric micro-gyroscope has the advantages of high symmetry, relatively stable structure, shock resistance and excellent performance. The nickel electrode side-driven hemispheric micro-gyroscope is driven by a side driving mode, so that technological implementation is facilitated, the cost is relatively low, and mass production is facilitated. The electrode micro-gyroscope has the advantages of small size, stable structure, sensitive response and the like, and has high symmetry, so that higher performance can be achieved.

The invention relates to the technical field of petrochemical industry production devices, in particular to a multi-zone reactor with a cyclone separator. The multi-zone reactor comprises a main cylinder and an auxiliary cylinder which are vertically arranged, and an annular shell is arranged between the top of the main cylinder and the top of the auxiliary cylinder. The cyclone separator comprises a pre-cyclone device arranged at the position, close to the main cylinder, of the annular shell and a cyclone guide device arranged at the inner top of the main cylinder, the cyclone guide device comprises an end socket located at the top of the main cylinder, a jacket and a plurality of flow guide partition plates, an annular flow channel is formed between the jacket and the inner wall of the end socket, and the flow guide partition plates are distributed in the annular flow channel in the circumferential direction; and the flow guide partition plate is in a spiral flow guide shape longitudinally. A pre-swirler can enable the flowing fluid to generate a rotating flow state around the bending central axis of the large annular shell, and the flow deviation state caused by centrifugal force when the flowing fluid flows through the annular shell is broken. And the flow guide device at the top of the main cylinder body can enable the fluid entering from the pre-swirler to generate a rotating flow state which is uniformly distributed in the circumferential direction around the central vertical axis of the main cylinder body, so that the effect of further strengthening the rotational flow is achieved.