358 results about "Curved beam" patented technology

Precision-folded, high strength, fatigue-resistant structures and a sheet therefore are disclosed. To form the structures, methods for precision bending of a sheet of material along a bend line and a sheet of material formed with bending strap-defining structures, such as slits or grooves, are disclosed. Methods include steps of designing and then separately forming longitudinally extending slits or grooves through the sheet of material in axially spaced relation to produce precise bending of the sheet when bent along the bend line. The bending straps have a configuration and orientation which increases their strength and fatigue resistance, and most preferably slits or arcs are used which causes edges to be engaged and supported on faces of the sheet material on opposite sides of the slits or arcs. The edge-to-face contact produces bending along a virtual fulcrum position in superimposed relation to the bend line. Several slit embodiments suitable for producing edge-to-face engagement support and precise bending are disclosed. With these teachings, forming numerous three-dimensional load-bearing structures from a two dimensional sheet are enabled. Examples of straight and curved beams, chassis, and exoskeletons are disclosed.

Disclosed is a condenser microphone chip, comprising: a substrate (21); a diaphragm (26) spaced from the substrate; a curved beam (27) connected with the diaphragm (26) to anchor the diaphragm (26) to the substrate (21); a curved beam connecting part (29) having a shape of a substantially circular plate. The curved beam (27) is arranged in the diaphragm (26). The curved beam (27) includes a plurality of sub beams, each of the plurality of sub beams including a first sub beam portion extending in a substantially radial direction from a circumference of the curved beam connecting part (29); a second sub beam portion extending in a substantially circumferential direction from an end of the first sub beam portion away from the circumference of the curved beam connecting part (29) and having a shape of a substantial arc; and a third sub beam portion extending in the radial direction from an end of the second sub beam portion away from the first sub beam portion and connected to the diaphragm (26). The condenser microphone chip according to the present invention is high in sensitivity, low in noise, wide in frequency band, simple in manufacturing process, and high in reliability. In addition, the condenser microphone chip can be easily manufactured in mass production.

This invention concerns a method for fabricating a curved beam from fiber composite material. A flat fiber composite laminate (2) comprising a plurality of layers and at least two different fiber directions is formed. The fiber composite laminate (2) is disposed in contact with a male tool (1) comprised of a first flange (1a), a second flange (1c) and an intermediate web (1b), which male tool (1) is curved in its longitudinal direction with a radius of curvature R in such a way that the first flange (1a) has a shorter longitudinal extent than the second flange (1c). The fiber composite laminate (2) is brought into contact with and secured to the first flange (1a) of the male tool (1). The male tool (1) and the fiber composite laminate (2) are then rotated relative to one another so that the fiber composite laminate (2) is brought into contact with the intermediate web (1b) of the male tool (1) in a first rotational movement, and brought into contact with the second flange (1c) of the male tool (1) in a second rotational movement. The fiber composite laminate (2) hardens on the male tool (1), and the finished beam is separated from the tool (1). The invention also relates to a beam of fiber composite material fabricated according to the method.

A cardiac valve repair device has a membrane assembly and a frame. The frame has a central structure that defines a central separation, a pair of sleeves positioned below the central structure, and a pair of atrial alignment expansion beams. Each atrial alignment expansion beam has a curved section and inner section at each opposite end that defines a scissor-crossing where they overlap each other to form a separate lower expansion clip beam at each of the opposite ends thereof. The cardiac valve repair device also includes a pair of upper expansion clip beams. A V-shaped ventricular expansion curved beam extends below the two sleeves, with the membrane assembly secured to the V-shaped ventricular expansion curved beam. A pair of ventricular alignment stabilizing beams extends downwardly from the two sleeves.

The present invention provides an optical display system and method for producing images and presenting the images for observation in combination with an observer's visual exterior view of an outside scene. The optical display system may include an image source for projecting an image, and a curved beam combination mirror (CBCM) or beam combination mirror (BCM) for reflecting the projected image toward an observer for observation. The image source may be a transmissive LCD, a reflective LCD, a digital micromirror device, a laser display, or the like. The CBCM or BCM may be positioned so that the observer, in a line of sight, may see a visual exterior view of an outside scene through the CBCM or BCM and the projected image in the CBCM or BCM.

A slide clamp includes a slot formed in a plate though which a fluid tube is mounted. The tube may be moved to a flow section of the slot or to an occluding section of the slot. Interconnecting the flow and occluding sections is a pinch zone in which the slot is narrower than the occluding section. Because of this narrow slot, the pinch zone resists movement of the tube from either the occluding or the flow sections into another section. The pinch zone includes a pair of curved beams that are formed as a result of apertures formed in the plate at locations laterally outward from the slot of the pinch zone. As a tube is forced from the occluding section to the flow section the curved beams flex outwardly permitting the tube to pass. However, if enough force is not applied to the tube, it will not overcome the curved beams and they will stop movement of the tube. After the tube has passed, the curved beams resiliently return to their rest position once again providing a stop. The beams are symmetrically shaped and will permit movement of the tube in either direction. The apertures also provide identification markers for the slide clamp.

Precision-folded, high strength, fatigue-resistant structures and a sheet therefore are disclosed. To form the structures, methods for precision bending of a sheet of material along a bend line and a sheet of material formed with bending strap-defining structures, such as slits or grooves, are disclosed. Methods include steps of designing and then separately forming longitudinally extending slits or grooves through the sheet of material in axially spaced relation to produce precise bending of the sheet when bent along the bend line. The bending straps have a configuration and orientation which increases their strength and fatigue resistance, and most preferably slits or arcs are used which causes edges to be engaged and supported on faces of the sheet material on opposite sides of the slits or arcs. The edge-to-face contact produces bending along a virtual fulcrum position in superimposed relation to the bend line. Several slit embodiments suitable for producing edge-to-face engagement support and precise bending are disclosed. With these teachings, forming numerous three-dimensional load-bearing structures from a two dimensional sheet are enabled. Examples of straight and curved beams, chassis, and exoskeletons are disclosed.

A pupil expansion apparatus is placed in the eye during an ophthalmic surgical procedure. In one embodiment, the pupil expansion apparatus is a square frame structure that comprises four straight beams which cross each other at their ends to form a cross beam arrangement. However, the expansion apparatus is not limited to being a square frame structure, and may have a circular, or any multi-sided frame structure. The crossed ends of the straight beams are connected by one or more curved beams, which also form iris supporting portions. The iris supporting portion is shaped in an open, curved form so as to be perpendicular to the plane formed by the frame. It receives the rim of the iris tissue when the pupil expansion apparatus is in its extended position and gently presses the iris to the periphery.

The invention discloses a bent piezoelectric-ceramic low-frequency underwater acoustic transducer comprising a front radiation head, a tail mass block, a front curved beam, a rear curved beam, a front piezoelectric crystal pile, a rear piezoelectric crystal pile, a middle opposite-phase piezoelectric crystal pile, a shell and an output cable, wherein the front curved beam, the rear curved beam, the front radiation head and the tail mass block are respectively stuck on two ends of the piezoelectric crystal piles in a certain mode, and thus the piezoelectric crystal piles are in a 'Z'-shaped bending structure of a zigzag rule shape. The shell is combined with a seal ring to realize underwater sealing. The output cable is characterized in that the leads of the piezoelectric crystal piles are connected to an outer driving source by the tail mass block. In the bent piezoelectric-ceramic low-frequency underwater acoustic transducer, the volume space of the transducer is fully utilized, and the sounding power volume of the transducer is increased; and the longitudinal stretching vibration mode of the piezoelectric crystal piles and the bending vibration mode of the curved beams are fully combined to realize the characteristics of low frequency, light weight and small volume of the underwater acoustic transducer to coexist. The bent piezoelectric-ceramic low-frequency underwater acoustic transducer has the advantages of simple structure, low construction cost and wide application, and is convenient to manufacture and convenient to disassemble.

The invention relates to a circular awning with a cable dome and a spatial steel truss being combined and a construction method of the circular awning. The circular awning comprises an awning roof and a main body; the circular awning is an approximately spherical segment surface; the awning roof is of a cable dome structure; the main body is of a spatial steel truss structure; the bottom end of the cable dome is fixedly connected with the top end of the spatial steel truss structure. The spatial steel truss structure comprises at least one layer of weft curved beam which is a polygonal spatial steel truss. The spatial steel truss structure comprises at least two layers of weft curved beams and radial curved pillars; the radial curved pillars are connected with each layer of weft curved beams, and every two adjacent radial curved pillars are connected through weft pull rods which are arranged at intervals according to fixed latitudes. The circular awning disclosed by the invention combines tensile and rigid structures, integrates inward tension of the tensile structure and outward thrust of the spatial steel truss structure, and realizes self-balance of inside and outside stresses; the stress of an arched steel structure is reduced, the integral structural stability is better, and meanwhile, the horizontal thrust of the lower part of the steel truss structure and a support is reduced, the maintenance cost of late-stage anticorrosion is reduced, and the construction efficiency is high.

The invention discloses a distributed fiber optic sensing technology and a system for monitoring of deformation of a high arch dam, which relate to the field of crossing of a dam safety monitoring technology and a fiber optic sensing technology and are used for overcoming the defect of a conventional means for the monitoring of the deformation of the high arch dam and filling the blank of using distributed fiber optic sensing for the monitoring of the deformation of a dome dam. Aiming at the characteristics and the difficulties of the dome dam, two kinds of unique curved fiber optic packaging structures, namely, fiber optic monitoring panels in a weakly curved beam type and a micro-bending beam type, are provided. Based on error analysis and curved beam height control-camber beam segmentation construction, excellent performance, high reliability, long service life, convenience and practicability of monitoring of fiber optic deformation are ensured. A convenient and practical layout installation mode in an arch dam and a gallery, a vertical shaft and a footrill of a dam foundation is provided, so that online remote metering on multi-dimensional and large-scale time-space broad coverage of three components (radial horizontal displacement, tangential horizontal displacement and vertical displacement) of internal deformation of the arch dam, the dam foundation and a dam abutment is realized. An optical demodulation instrument is multifunctional and can be used for metering concrete temperature, reservoir water temperature, slit level in front of a dam, reservoir sedimentation and the like.

The invention discloses a sensitive structure and accelerometer with super-high acceleration displacement sensitivity and a manufacturing method. The micromechanical sensitive structure comprises a sensitive mass block, a high-reflective film plated on the sensitive mass block, an S-shaped beam type cantilever beam connected to the sensitive mass block and a silicon substrate connected with the tail end of the S-shaped beam type cantilever beam. The lower portion of the micromechanical sensitive structure is connected with a substrate with a groove. The S-shaped beam type cantilever beam is mainly formed by sequentially connecting four straight beams of a thigh beam, a first curved beam, a second curved beam and a shank beam. The sensitive mass block and the silicon substrate are both made of SOI substrates. The cantilever beam is made of a monocrystalline silicon device layer in the SOI substrate. According to the sensitive structure and accelerometer, the super-high acceleration displacement sensitivity is achieved, small off-axis crosstalk can still be kept, a micromachining process and an IC process can be compatible, the substrate conveying rate is high, mass manufacturing is easy, and in cooperation with a displacement reading-out system based on a grating interference cavity, super-high acceleration measuring sensitivity and precision can be achieved.

An ion implantation apparatus is disclosed in this invention. The ion implantation apparatus includes a target chamber for containing a target for implantation and an ion source chamber includes an ion source for generating an ion beam. The ion source chamber further includes an ion beam steering means for steering the ion beam through a curved beam-trajectory to a targeted ion-beam direction. The ion source chamber further includes a beam deceleration optics for decelerating and filtering the ion beam for spreading out the ion beam over an angular range according to an energy and an electric charge of each ion of the ion beam. The ion beam apparatus is able to more accurately direct a low energy ion to a target wafer. The ion beam steering means coordinating with the beam deceleration means for generating an electromagnetic field for separating neutralized particles from charged particles by steering the neutralized particles to transmit in a neutralized-particle direction slightly different than the targeted ion-beam direction. The beam deceleration optics further includes a plurality of electrodes for generating an electric field for spreading the charged ion beam over an angular range to accurately control the trajectory paths of ions of different energy levels. The purpose is to eliminate the energy contamination by more accurately controlling the energy range of the charged ions to reach the target for implantation and to block the neutralized particle and ions of higher energy from reaching the target for implantation.

The invention relates to a tire walking full-hydraulic lining trolley and belongs to the technical field of tunnel construction. The trolley comprises a trolley body. A trolley hydraulic leveling supporting and walking system, gantries and a template and hydraulic template supporting adjusting system are arranged successively from the bottom to the top according to the trolley height direction. The trolley hydraulic leveling supporting and walking system comprises trolley overall leveling and supporting hydraulic oil cylinders, a curved beam and tire walking systems. The trolley overall leveling and supporting hydraulic oil cylinders are fixed on the curved beam, and the tire walking systems are arranged at the bottom of the curved beam. The gantries comprise lower bearing gantries and upper bearing gantries, the lower bearing gantries are fixed on the upper portion of the curved beam, and the gantries and the trolley overall leveling and supporting hydraulic oil cylinders are arranged on a same perpendicular line. The template and hydraulic template supporting adjusting system comprises templates, lateral template supporting hydraulic adjusting supporting oil cylinders, vertical template supporting hydraulic adjusting oil cylinders and horizontal template supporting hydraulic adjusting oil cylinders.

An elongate article holding package for a pre-curved beam blade wiper blade includes a pair of packaging panels joined by a living hinge. In a currently preferred embodiment, the package has two panels joined by a living hinge. A first panel is configured to retain the wiper blade in a substantially straight configuration within a cavity formed in the panel, and the second panel is pivotally connected by the living hinge to be disposed in either a closed or an open position with the first panel. The first panel preferably includes a first channel having a first bottom wall and a second channel disposed in the first bottom wall and in communication with the first channel. The first panel preferably also includes retention fingers to positively retain the wiper blade and recessed sidewall portions to facilitate insertion and extraction of the wiper blade into the first panel.

The invention discloses a recoverable six-way buffer energy-absorbing metamaterial and a design method thereof, and relates to the technical field of metamaterials. The recoverable six-way buffer energy-absorbing metamaterial comprises a multi-cell metamaterial structure formed by periodically arranging a plurality of unit cells, wherein each unit cell is composed of a cuboid frame and a crossed curved beam, the cuboid frame is composed of 10 straight beams, the crossed curved beam is composed of two curved beams, six sets of crossed curved beams are installed in six surfaces of the cuboid frame, the ends of the crossed curved beams are fixedly connected with the cuboid frame, the bending directions of the crossed curved beams arranged on the opposite surfaces of the cuboid frame are consistent, the middle parts of the crossed curved beams in different unit cells are connected together through connecting rods, and the multiple unit cells are periodically arranged to form the multi-cellmetamaterial structure. The metamaterial is formed by periodically arranging the unit cells, the mechanical properties of the metamaterial in all directions can be adjusted by compiling the mechanical properties of the crossed curved beams in the unit cells, and the metamaterial is wide in application range, easy to machine, capable of being directly manufactured through the 3D printing technology and convenient to apply and popularize on a large scale.

Disclosed is a condenser microphone chip, comprising: a substrate (21); a diaphragm (26) spaced from the substrate; a curved beam (27) connected with the diaphragm (26) to anchor the diaphragm (26) to the substrate (21); a curved beam connecting part (29) having a shape of a substantially circular plate. The curved beam (27) is arranged in the diaphragm (26). The curved beam (27) includes a plurality of sub beams, each of the plurality of sub beams including a first sub beam portion extending in a substantially radial direction from a circumference of the curved beam connecting part (29); a second sub beam portion extending in a substantially circumferential direction from an end of the first sub beam portion away from the circumference of the curved beam connecting part (29) and having a shape of a substantial arc; and a third sub beam portion extending in the radial direction from an end of the second sub beam portion away from the first sub beam portion and connected to the diaphragm (26). The condenser microphone chip according to the present invention is high in sensitivity, low in noise, wide in frequency band, simple in manufacturing process, and high in reliability. In addition, the condenser microphone chip can be easily manufactured in mass production.

The invention relates to the technical field of monorail traffic tracks, in particular to a replacing beam turnout structure and a turnout switch method. The replacing beam turnout structure comprises a straight beam, a curved beam, a drive device and locking devices. A connection rod is hinged between the straight beam and the curved beam. The straight beam is used for straight rib communication of a turnout and track beams. The curved beam is used for side rib communication of the turnout and the track beams. The drive device is fixed to the ground. The other end of a push rod of the drive device is hinged to the middle of the straight beam. The drive device is used for releasing swinging power of the straight beam. The tail end of the straight beam and the tail end of the curved beam are both connected with the single surface of a foundation bottom plate in a rotating manner through a rotating assembly. The head end of the straight beam and the head end of the curved beam are both provided with the locking devices. The locking devices are used for locking connection of the straight beam or the curved beam and the track beams. According to the replacing beam turnout structure and the turnout switch method, when the turnout switches, the drive device drives the straight beam to swing, the curved beam swings under the pull action force of the connection rod so as to connect the track beams at the two ends of the turnout through the straight beam or the curved beam, the locking devices conduct locking, and the turnout switch function is achieved.

The invention discloses a vibration isolation structure based on bistable curved beams. A plurality of cell element structures are sequentially connected and regularly arranged in a plane or space to form the vibration isolation structure. Each cell element structure comprises a supporting rod, the bottom end of each supporting rod is connected with the top of the corresponding bistable curved beam, the two ends of each bistable curved beam are connected with the two ends of a connecting rod correspondingly, and a spring is connected between the top of each bistable curved beam and the corresponding connecting rod. The vibration isolation structure is simple in structure and easy to manufacture, the positive stiffness and the negative stiffness in a whole vibration isolation system are easy to adjust, then the force corresponding to a quasi-zero stiffness interval is adjusted so as to adapt to different loads, meanwhile, the minimum unit modular design can adapt to different structural environments, and the engineering requirements are met.

The invention provides a compound energy consumption one-way bridge support with a simple construction, convenient machining and stable performance. By using the characteristics of curve and tensile deformation of soft steel curved beams, the support mainly comprises a lower basin (1), an upper basin (2), a spherical cap lining plate (3), a curved beam (4), anchored steel sleeves (9), and anchor bolts (10). The spherical cap lining plate (3) is positioned between the upper basin (2) and the lower basin (1), and is concentrically matched with the upper basin (2). The upper basin (2) and the lower basin (1) are provided with four anchored steel sleeves (9) and the anchor bolts (10) respectively. The curved beam (4) is symmetrically arranged between the upper basin (2) and the lower basin (1), and two ends of the curved beam (4) are hinged with the spherical lining plate (3) and the lower basin (1) respectively. The support allows for the longitudinal bridge deviation between the upper basin and the lower basin, while the transverse bridge deviation is restrained. When the longitudinal bridge deviation between the upper basin and the lower basin occurs, the energy of the system is consumed through the deformation (curve, stretch) of the curved beams to achieve the aim of reducing the vibration; therefore, the conventional support has the function of energy consumption.

The invention discloses a ceiling fault surface structure of an urban rail stainless steel vehicle. The ceiling fault surface structure comprises two upper chord beams and a plurality of curved beams which are laterally arranged at intervals on the upper chord beams in parallel, wherein two ends of each of the curved beams are respectively butted against on the positioning surfaces of the upper chord beams; the top surfaces of two ends of each of the curved beams are respectively combined with a side top plate in a clamping manner; a covering surface is arranged on the upper central surfaces of curved beams; the covering surface comprises a corrugated plate region and an arc plate region which are in arc welding connection; an air conditioner platform is arranged in the arc plate region; the top surface of the corrugated plate region and the top surface of the arc plate region are on the same plane. The novel stainless steel ceiling fault surface structure effectively solves the problem of light weight design of a vehicle body structure, the weight of the vehicle body structure per unit length can be reduced by about 20kg, the production technology flows are simplified, and the production efficiency is improved. Material consumption is reduced, so that the material cost is reduced. The number of small built-in steel structure components is obviously reduced, the small components are simple in structure and easy to produce and weld, and a design basis is provided for the novel stainless steel vehicle body structure.

The invention relates to a periodic curved beam structure floating raft based on wave mode conversion. The periodic curved beam structure floating raft mainly comprises an upper panel, a plurality of middle periodic curved beam structures and a lower panel, wherein the plurality of the periodic curved beam structures are arranged in the length direction and the width direction of the panels side by side and periodicity is formed in each of the length direction and the width direction; in the thickness direction of the panels, the periodic curved beam structures are of the periodic structures formed by multiple layers of small panels and curved beams; when vibration is propagated along the thickness direction via the curved beams, transfer and conversion of waves can occur, the stop band characteristics of the periodic structures are formed, and the vibration can be greatly attenuated; and the small panels of all the periodic curved beam structures are connected with the upper panel and the lower panel. The floating raft provided by the invention utilizes the stop band characteristics of the periodic structures and utilizes the curved beams with a wave mode conversion effect as elastic elements for providing static stiffness and dynamic stiffness, thereby increasing vibration attenuation, realizing a wideband gap in a lower frequency band and increasing the vibration isolation performances of a low frequency band and a wide frequency band of a vibration isolation device of the floating raft.