101results about How to "Small curvature" patented technology

A method of transporting and storing a wind turbine blade (1) including a blade root (10) and a blade tip (4), where the wind turbine blade curves in the unloaded state in such a manner that the blade (1) presents a substantially concave face (30) and a substantially convex face (12), and such that said blade tip (4) is spaced apart from the longitudinal central axis (28) of said blade root (10). By the method, the wind turbine blade (1) is prestressed by means of prestressing means (2, 5, 6, 9, 13, 16, 17, 21, 22, 23, 24, 25, 26, 33) at a distance from the blade root (10) in such a manner that the blade tip (4) is brought closer to the longitudinal central axis (28) of the blade root (10). The invention also relates to a curved wind turbine blade (1) being provided with inner ballast tanks (21) at a distance from the blade root (10), whereby the blade is prestressed by filling said ballast tanks in such a manner that the blade tip (4) may be brought closer to the longitudinal central axis (28) of the blade root (10). The invention further relates to an apparatus including prestressing means for loading a curved blade at a distance from the blade root (10) in such a manner that the blade tip (4) is brought closer to the longitudinal central axis (28) of the blade root (10).

A method of adjusting a projection objective permits the projection objective to be adjusted between an immersion configuration and a dry configuration. The projection objective includes optical elements arranged along an optical axis thereof, which include a first group of elements following the object plane and a last optical element following the first group, which is arranged near the image plane. The last optical element defines an exit surface of the projection objective, which is arranged at a working distance from the image plane. The last optical element is substantially without refracting power and has no or only slight curvature. The method includes varying the thickness of the last optical element, changing the refractive index of the space between the exit surface and the image plane by introducing or removing an immersion medium, and axially displacing the last optical element to set a working distance.

The present invention relates to the use of a shaped bottom electrode in a resistance variable memory device. The shaped bottom electrode ensures that the thickness of the insulating material at the tip of the bottom electrode is thinnest, creating the largest electric field at the tip of the bottom electrode. The arrangement of electrodes and the structure of the memory element makes it possible to create conduction paths with stable, consistent and reproducible switching and memory properties in the memory device.

The invention belongs to the field of technologies for processing advanced materials, and particularly provides a method and equipment for efficiently cutting large-diameter single crystals by the aid of diamond wires. The method and the equipment have the advantages that the equipment is convenient to operate and is provided with a multi-wire cutting machine and the diamond cutting wires, the diameters of the diamond cutting wires range from 120 micrometers to 400 micrometers, diamond particles are plated on outer layers of the diamond cutting wires, multiple pieces of large-diameter SiC crystal bars can be cut by the aid of reciprocating high-speed cutting movement of the diamond cutting wires, the surface roughness, the bending and the total thicknesses of cut SiC wafers hardly vary, and a plurality of target crystals can be cut in each procedure; the crystal can be cut at high speeds, crystal cutting elapsed time is short, and accordingly the silicon carbide wafers can be efficiently cut by the aid of the method and the equipment.

An intramedullary nail, particular for use with a tibia, may have a proximal end part, a distal end part adapted to be introduced into a medullary space, and a central section. The central section includes a first curved section having a first length with a first radius of curvature, and a second curved section having a second length shorter than the first length and a second radius of curvature smaller than the first radius of curvature. The second radius of curvature may be less than the first radius of curvature. The intramedullary nail also includes a central axis. Tangents at two end points of the central section, including the first and second curved sections, enclose an angle gamma between about 9° and about 12°. The intramedullary nail may have a total length ranging from 200 to 500 mm.

A bending apparatus which can bend pipes and obtain as small curvature as possible without flattening or buckling easily occurring in the bending region. The bending apparatus comprises a bending die for a pipe, a clamping die which rotates together with the bending die while clamping the pipe, a pressure die which hold down the pipe, and a metal core which is inserted into the pipe and maintains the shape of the bending region, wherein the metal core is a spherical metal core rotatably supported by an arch shaped arm on the leading end of a core holder.

A filler device comprising: a filler neck including a pouring inlet through which a fuel is injected and a neck connection portion; a connection pipe including a pipe connection end to which the neck connection portion is connected and a bellows part which is curved along a filling passage to a fuel tank; wherein the fuel injected through the pouring inlet is fed into the fuel tank through a filling passage, the connection pipe is provided with a pipe-side engaging portion on a back side of the pipe connection portion, the filler device further includes an inner tube including a tube body formed of a flexible elastomer material and inserted into the connection pipe, and a tube-side engaging portion projecting from an outer circumference at an end of the tube body, the inner tube is configured so that the tube body covers an inner wall of the bellows part and that the tube-side engaging portion is engaged with the pipe-side engaging portion, when the inner tube is inserted into the connection pipe, reaching to the back side of the pipe connection end.

An apparatus for manufacturing 3D glass, the apparatus including: a molding part for molding a glass substrate; an assembling and disassembling part for carrying-out the molded glass substrate and replacing the molded glass substrate with an other glass substrate; and a loading part for loading the molded glass substrate is disclosed. A method for manufacturing 3D glass including: carrying-in a mold including a glass substrate into a chamber of a molding part; preheating the carried-in mold; molding the glass substrate by pressing the heated mold; cooling the molded glass substrate; and carrying-out the molded glass substrate and carrying-in an other glass substrate into the mold is also disclosed.

A rotation angle detector includes: a magnet attached to a rotating shaft and magnetized in a certain direction orthogonal to an axis of the rotating shaft; and a non-rotary magneto-electric transducer placed to be opposed to an end surface of the magnet, and configured to detect a rotation angle of the rotating shaft in cooperation with the magnet through magneto-electric transduction. A concave curved surface is formed in the end surface of the magnet in order to make a magnetic flux of a magnetic field facing the end surface of the magnet closer to the magnet and flattened. Accordingly, it is possible to provide a rotation angle detector which is compact in size and has a stable accuracy for detecting the rotation angle, by making the curvature of the magnetic flux near the end surface of the magnet small and placing the magneto-electric transducer in that location.

Intended is to provide a mixed flow turbine or a radial turbine, which can suppress an abrupt increase in a load to be applied to the front edge portion of a blade, thereby to reduce an incidence loss. The mixed flow turbine or the radial turbine comprises a hub (3), and a plurality of blades (7) arranged at substantially equal interval on the outer circumference (5) of the hub (3) and having a warpage (23) curved convexly in the rotating direction, as entirely viewed from the front edge side to the back edge side. Each blade (7) is provided, at its front edge portion, with an inflection point (K), at which the warpage (23) in the section along the outer circumference is curved concavely in the rotating direction.

A zoom lens includes, in the following order from an object side: a first lens group including negative refractive power; a second lens group including negative refractive power; and a third lens group. At least the second and third lens group are movable along an optical axis to perform a zooming action. The second lens group is movable in a direction orthogonal to the optical axis to shift an image in a direction orthogonal to the optical axis. The following (1) and (2) are satisfied:

0.5<(1−βα)×βb<1.0, and  (1)

0.1<|f1/f2|<1.25,   (2)

where βα is magnification of the second lens group at a telephoto end of the zoom lens; βb is magnification of a lens group on an image side relative to the second lens group; f1, f2 are focal lengths of the first, second lens group, respectively.

A fluid ejecting apparatus includes: a fluid ejecting head in which nozzles that eject fluid are provided; a wiper that wipes a nozzle formation face, in which nozzle orifices of the nozzles are formed, in the fluid ejecting head; and a pressurization mechanism which changes the curvature of a concave liquid surface formed in the nozzle, in the nozzle by performing pressurization on the fluid in the fluid ejecting head at the time of the wiping.

A vehicle mirror apparatus comprising a mirror provided at a vehicle; a pivoting member holding the mirror; a sliding part provided at the pivoting member; a holding member pivotably holding the pivoting member, whereby an angle of a mirror surface of the mirror is adjusted; and a pivoting surface provided at the holding member. The sliding part is made slidable on the pivoting surface while a gap is provided between an edge of the holding member at a side of the pivoting member and the pivoting member in a pivoting radial direction of the pivoting member.

The invention discloses a butterfly valve of a water storage tank. An electromagnetic controller is mounted on a valve body, a butterfly plate with a permanent magnet is mounted in an inner cavity of the valve body; upper valve covers are respectively fixed to the upper end of the valve body, lower valve covers are respectively fixed to the lower end of the valve body, and the permanent magnet is fixed to the middle part of one end surface of the butterfly plate; an upper shaft sleeve and a lower shaft sleeve are coaxial, the upper shaft sleeve is fixed to the upper part of the end surface, on which the permanent magnet is positioned, of the butterfly plate, and the lower shaft sleeve is fixed to the lower part of the end surface, on which the permanent magnet is positioned, of the butterfly plate; the upper shaft sleeve is in matching connection with the upper valve covers through an upper valve rod, and the lower shaft sleeve is in matching connection with the lower valve covers through a lower valve rod; an inlet flow channel and two outlet flow channels are arranged on the other end surface of the butterfly plate; an inlet filter pipe is also connected to the inlet flow channel. According to the butterfly valve disclosed by the invention, the situation of leakage between the valve rods and fillings is avoided, besides, a gaseous cavitation preventing flow channel is processed on the surface of the butterfly plate, and one side of the butterfly plate is a spherical protrusion. The butterfly valve has the effects of shunting decompressing, reducing gaseous cavitation, preventing vibration and reducing noise, and the service life of the butterfly valve is prolonged. On the other hand, the inlet filter pipe has the effects of filtering water flows, and preventing valve cores from being destroyed.

The invention discloses a one-way valve. The one-way valve comprises a valve rod, a valve body, a gate plate, a valve cover, a hand wheel and a check valve core assembly, wherein a water inlet and a water outlet are formed in the valve body, the check valve core assembly is arranged in a cavity body of the water inlet to form a check valve, at least one threading hole is formed in the valve cover, a threading hole is formed in the valve body, and a filter pipe is further connected to the outer end of the water inlet. According to the one-way valve, a gate valve and the check valve are integrated, so that the one-way valve has dual functions of two valves, and an original complex combined structure is simplified; the threading holes are formed in the valve cover and the valve body, and the valve cover and the valve body are stringed by threads, so that water is effectively prevented from being stolen by users; and furthermore, the one-way valve further has a filter function, so that the damage of the valve core is effectively prevented.