59results about How to "Good angle stability" patented technology

An implant for osteosynthesis, for example a bone nail, has an implant body which has at least one bore with a threaded portion and a bone screw which engages the thread when it is threaded into a bone for the fixation of the implant body. The threaded bore has an annular groove the diameter of which is larger than the thread outer diameter, and which receives a ring of a deformable material with an inner diameter which is smaller than the outer diameter of the thread of the bone screw so that the ring extends partially into the bore.

The present invention relates to a substrate bearing a solar-control multilayer stack, and to a multiple glazing unit and to a laminated glazing unit incorporating at least one such substrate bearing a solar-control stack.

The multilayer stack comprises three functional films, each film, starting from the substrate, being thicker than the preceding one, and four transparent dielectric coatings. The ratio of the optical thickness of the third dielectric coating, to the optical thickness of the final dielectric coating, lies between 2 and 3.2, and the ratio of the optical thickness of the third dielectric coating, to the optical thickness of the second dielectric coating, is either between 0.6 and 0.91 or between 1.15 and 1.7.

The invention is applicable, in particular, to production of high-selectivity solar-control glazing units.

Narrow aerial and die-mount cams, each having a cam adapter, a driver and a slide sandwiched between the cam adapter and driver. The narrow aerial cam slide has an elongate primary portion that has a T-shaped cross-section and has a primary bearing surface, and the cam adapter has a rectangular recess. An elongate keeper plate having a longitudinal slot is secured to each side of the cam adapter adjacent the rectangular recess to slidably retain the primary portion of the slide within the longitudinal slots and the rectangular recess. The primary bearing surface and a pair of intermediate bearing surfaces formed in the slide below the primary portion slidably support the keeper plates and thus the cam adapter. The driver slidably supports the slide. The narrow die-mount cam is basically an inverted version of the aerial cam.

A cellulose ester film containing a polyester represented by Formula (1) or (2), wherein an in-plane retardation value (Ro) is 0 to 5 nm and a retardation value in a thickness direction (Rt) is −20 to 10 nm, Ro and Rt being measured at 23° C. and 55% RH:

B₁-(G-A-)_mG-B₁  Formula (1)

• • wherein B₁: monocarboxylic acid, G: dihydric alcohol, A: dibasic acid, B₁, G and A contain no aromatic ring, m: repeat number, plural B₁ may be the same or different, and plural G may be the same or different; and

B₂-(A-G-)_nA-B₂  Formula (2)

wherein B₂: monoalcohol, G: dihydric alcohol, A: dibasic acid, provided that none of B₂, G and A contains an aromatic ring, n: repeat number, plural B₂ may be the same or different, and plural G may be the same or different.

The invention discloses a broadband wave-absorbing frequency selection surface, and the surface comprises an upper dielectric plate and a lower dielectric plate, wherein an air layer is arranged between the upper dielectric plate and the lower dielectric plate, the surface of the upper dielectric plate is provided with periodically arranged double-ring metal patches, both the inner square ring metal patch and the outer square ring metal patch are loaded with resistors, and the lower dielectric plate is a metal plate. The problems that an existing wave absorber is large in thickness and narrowin wave-absorbing frequency band can be effectively solved.

The invention discloses a reflecting plate based on frequency selection surface units. The reflecting plate is mainly used for solving the problems that an existing reflecting plate is relatively large in size, cannot be applied to antennae with smaller sizes and cannot reduce the antenna radar cross section in a multi-angle manner. The reflecting plate comprises Z frequency selection surface units (1) and a base plate (2), wherein Z is larger than or equal to 4; the Z frequency selection surface unit are uniformly distributed on the surface of the base plate in a rectangular array; each frequency selection surface unit consists of four pasters; each paster (11) comprises a rectangular trunk (111) and n arc-shaped branch knots (112), and the n arc-shaped knot are alternatively arranged on two sides of the rectangular trunk; and the four pasters respectively rotate 90 degrees, 180 degrees and 270 degrees by utilizing the bottom left corners of the pasters as centers, so as to form a crossed distribution structure of the four pasters. According to the reflecting plate, the electric size of each frequency selection surface unit is prolonged, the space is fully utilized, the resonant frequency is reduced, and the reflecting plate can be applied to the antennae with smaller sizes and can be used for reducing the antenna radar scattering cross section in a multi-angle manner.

The invention relates to a dual-band reconfigurable frequency selection surface and a control method thereof, which relates to the technical field of electromagnetic metamaterials. The present invention includes a dielectric substrate and a closure unit structure on an upper side of the dielectric substrate. The closed cell structure consists of four PIN diodes and four metal opening cells extending periodically in horizontal and vertical directions. The metal opening element is square and comprises two short-line structures and two long-line structures, wherein, the two long-line structures are connected with each other and perpendicular to each other, and the long-line structure and the short-line structure are parallel to each other; the four lines have the same thickness d and constitute four sides of the metal opening unit. The PIN diodes can be oriented counterclockwise/clockwise and are connected to the metal opening unit at both ends. By changing the switching state of the PINdiode, the frequency selection surface is in a reconfigurable state. The invention has the advantages of simple structure, easy processing and realization, reconfigurable function and double-wave bandfiltering, and has good application prospect.

The invention discloses a bone connecting device for treating femoral intertrochanteric fracture. The bone connecting device for treating femoral intertrochanteric fracture comprises a bone connecting plate, a circular knife and fixing screws, wherein the bone connecting plate comprises a bone connecting plate upper portion, a bone connecting plate middle portion and a bone connecting plate lower portion which are sequentially connected to one another; the bone connecting plate upper portion is arc-shaped; the bone connecting plate middle portion is obliquely arranged at the lower end of the bone connecting plate upper portion; the outer side of the bone connecting plate middle portion and the outer side of the bone connecting plate lower portion are straight; the bone connecting plate middle portion is thicker than the bone connecting plate upper portion and the bone connecting plate lower portion; a sleeve is arranged on the bone connecting plate middle portion; threads are arranged at the front end of the circular knife; and the rear of the circular knife does not have threads. When the bone connecting device is used, the circular knife is obliquely placed in a femoral head via a femoral neck from a greater trochanter, the threads of the circular knife are fixed in the femoral head, and the rear of the circular knife is slidably connected with the femoral neck and the sleeve; and the bone connecting plate upper portion and the bone connecting plate lower portion are provided with locking screw holes which are locked with the fixing screws in a threaded manner. By the mode, a fracture portion can be compressed, and a fracture line is reduced; and angular stability is high, displacement fracture can be prevented, injury is reduced, and healing on femoral intertrochanteric fracture is facilitated.

The invention discloses a narrowband bandpass frequency selective surface. The frequency selective surface is formed by periodically arranging a plurality of same unit structures, and each unit structure comprises a square metal cylinder and a square dielectric block. Two identical Jerusalem metal cross-shaped part are engraved in the upper surface and the lower surface of the square dielectric block respectively, and the middle layer is a square metal plate with four identical rectangular apertures. The upper surface resonance structure and the lower surface resonance structure of the unit structure generate an electromagnetic coupling effect through the rectangular aperture of the middle layer, two transmission poles are generated, and a flat passband is formed. Meanwhile, two transmission zeros are introduced out of the right side of the passband, so that the filter has high frequency selectivity and wide out-of-band rejection. Meanwhile, the frequency selective surface has good angle stability in a dual-polarization mode.

This is a magnetic actuator including a mobile magnetic portion (20), a fixed magnetic portion (10) provided with at least two attraction areas (11, 12) for the mobile magnetic portion (20), and means (30) for triggering the displacement of the mobile magnetic portion (20), the mobile magnetic portion (20) being in levitation when it is not in contact with an attraction area (11, 12). The mobile magnetic portion (20) includes a magnet-based part (200) with reduced magnet weight, this part (200) having an overall volume, and a mass which is less than the one it would have if its overall volume was totally occupied by the magnet.

A one-piece piston having an investment or other permanent or non-permanent mold/die precision cast piston crown, rod flange and piston skirt. The piston crown has a relative constant thickness, a flange requiring minimal machining and a skirt providing for a wall with a support against the angular shifting of the piston. This improves the distribution of heat within such crown and the angular stability of the piston wall at the piston rod connection.

An insulating glass (IG) window unit including first and second glass substrates that are spaced apart from each other. At least one of the glass substrate has a triple silver low-emissivity (low-E) coating on one major side thereof, and a dielectric coating for improving angular stability on the other major side thereof.

The invention relates to a frequency selection surface structure applied to a Ku waveband and a unit structure thereof. The unit structure comprises a first metal layer, a dielectric substrate and a second metal layer which are arranged in order from top to bottom, wherein the first metal layer is provided with a first star-shaped gap, and the first star-shaped gap comprises a first polygonal gappart positioned at the center and a plurality of first triangular gap parts surrounding the first polygonal gap part; and a second star-shaped gap comprises a second polygonal gap part positioned at the center and a plurality of second triangular gap parts surrounding the second polygonal gap part. The frequency selection surface structure comprises M*N periodically arranged unit structures. The frequency selection surface structure has very high filtering features in the 12GHz frequency band and can prevent the broadcast signals of a satellite from being interfered by other frequency signalsin a downlink.

Deflectors configured to be attached to cables towed behind a vessel for performing a marine survey are provided. A deflector has a wing body including a first part joined to a second part to form a swept-back-wing shape, the first part and the second part being substantially coplanar. A first straight line stretching along at least a portion of a front edge of the first part makes a first angle with a second straight line stretching along at least a portion of a front edge of the second part. A third straight line stretching along at least a portion of a trailing edge of the first part makes a second angle with a fourth straight line stretching along at least a portion of a trailing edge of the second part, the first angle and the second angle being non-zero angles.