58results about How to "Adjustable flexibility" patented technology

A multi-axis spinal fixation device which can use a fixed head spinal or pedicle screw in combination with a multi-axial rod assembly to achieve anatomically correct fixation of vertebrae. The orthopedic fixation can be controlled by a different combination of rod elements to provide a varied range of motion between adjacent vertebrae as well as specific flexibility between the adjacent vertebrae or levels. The surgeon can make intra-operative adjustments from rigid fixation to dynamic stabilization and where desired also provide ‘soft-stabilization’ or ‘micro motion’. The unique combination of elements can provide fixed stabilization for the purpose of fusion or dynamic stabilization without fusion.

A spinal fixation assembly has a bone screw with head having a continuously curved spherical outer surface. The curved surface nests in a split annular bushing having a plurality of segments curving around the screw head. The bushing has an outward extending flange that fits into a recess in a socket in a fixation plate. The plate has at least three legs which extend from ends of a cross-member to form one of an H shaped, X shaped or A shaped configuration. Each socket is curved to rotatably receive rotation of the bushing. The socket recess is larger than the bushing flange to allow the bushing to tilt a predetermined amount depending on a thickness of the outward extending flange.

A method for accessing a target site in the body by transferring a guidewire from an initial insertion site on the body to a different insertion site on the body is provided. In one aspect, a method for transferring a medical device or component, such as a sensor lead, from an initial insertion site to another insertion site is also provided. A guidewire of sufficient length, pliancy and deformability to perform a transfer from one insertion site to another insertion site is provided. In one aspect, the guidewire comprises a removable core mandrel to increase rigidity, facilitate insertion and / or improve steerability. A kit or system, comprising introducers, guidewires and catheters for performing a guidewire or device transfer is also provided.

A transfer guidewire assembly configured to manipulate an implanted elongate body includes a flexible elongate portion, such as a guidewire, and coupler. The flexible elongate body has a proximal end and a distal end attached to the coupler. The coupler can include a catheter and / or a handle. The handle can include a screw. The coupler is configured to be removably attached to the end of an implanted elongate body, for example, by forming an interference fit with the outside diameter of the implanted body. A method for transferring an end of an implanted medical component from first site to a second site within a patient, such as a pacemaker, defibrillator, and / or sensor lead, etc., includes inserting a guidewire into the body at the first site and externalizing the guidewire at the second site. A proximal portion of the implanted component near the first site and is attached to the guidewire. The proximal portion of the implanted component is pulled through the patient's body and out the second site with the transfer guidewire assembly.

A method for accessing a target site in the body by transferring a guidewire from an initial insertion site on the body to a different insertion site on the body is provided. In one aspect, a method for transferring a medical device or component, such as a sensor lead, from an initial insertion site to another insertion site is also provided. A guidewire of sufficient length, pliancy and deformability to perform a transfer from one insertion site to another insertion site is provided. In one aspect, the guidewire comprises a removable core mandrel to increase rigidity, facilitate insertion and / or improve steerability. A kit or system, comprising introducers, guidewires and catheters for performing a guidewire or device transfer is also provided.

An adjustable nozzle attachment for a pool cleaner includes a planar member having an upper surface and a lower surface with an orifice formed through the planar member adapted for coupling to a vacuum suction source. A plurality of attaching means are formed on the lower surface of the planar member, each of which is adapted to interchangeably or selectively receive at least one of a plurality of rollers and a plurality of brushes that extend from the lower surface and support the nozzle attachment during movement over a surface being cleaned. When installed, the plurality of rollers and brushes change the nozzle attachment's flexibility characteristics, thereby permitting a user to adjust the overall flexibility of the nozzle attachment, based upon the type of surface to be cleaned.

The invention relates to a perfluoro alkyl ethyl acrylic ester-modified single-component acrylic resin and a preparation method as well as application thereof. The perfluoro alkyl ethyl acrylic ester-modified single-component acrylic resin has the structural formula which is shown in the specification, wherein n is equal to 4, 6 or 8; and the molecular weight is 40,000-55,000. The preparation method comprises the following steps of: adding a solvent into a reaction vessel and heating to 60-80 DEG C; uniformly mixing methyl methacrylate, acrylic acid, butyl acrylate, hydroxyethyl acrylate and perfluoro alkyl ethyl acrylic ester type monomer with an initiator and dropwise adding for 2-3 hours; preserving heat for 0.5-1 hour; and cooling to 40-70 DEG C and discharging. The resin prepared by the invention has high thermal stability and chemical resistance stability and low surface energy and is used as a main raw material of a paint; and a coating also has low surface energy, strong water-proof and oil-proof capacities and high weather resistance, corrosion resistance and aging resistance, has superior mechanical performance and high glossiness of an acrylic ester paint, can be cured at normal temperature and is easy and convenient to use.

The invention relates to hydroxylated acrylic resin as well as preparation method and application thereof. The hydroxylated acrylic resin has a structural formula, wherein n is equal to 4, the sum of C number in 6, 8, R1 and R2 is 9, and the molecular weight is 10,000-20,000; the preparation method comprises the steps of: adding solvent and reactive solvent into a reaction vessel under protectionof nitrogen gas environment, and increasing temperature to 150-160 DEG C; evenly mixing acrylic acid, methyl methacrylate, ethyl acrylate, hydroxyethyl acrylate and perfluoroalkylethyl acrylate monomer with initiator, and carrying out dropwise addition for 3-4 hours; carrying out heat insulation for 1.5-2 hours; and reducing temperature to 40-70 DEG C for discharging, thus obtaining hydroxylated acrylic resin. A paint film formed by the hydroxylated acrylic resin and a curing agent has properties of both acrylic polyurethane and fluorocarbon coating. The prepared hydroxylated acrylic resin can carry out reaction smoothly at normal temperature and normal pressure, has low production cost, can be cured at normal temperature and be applied in the fields of ships, containers, drilling platforms, anticorrosion of steel structures, outer wall coating of high-rise buildings and the like.

The invention discloses a flexible control method and system for a multi-degree-of-freedom mechanical arm, belongs to the technical field of multi-degree-of-freedom mechanical arm control, and solves the problem of how to obtain load gravity and a gravity center position only through a load parameter identification manner when a tail end tool of the mechanical arm is changed and automatically perform load parameter compensation. Kinematics modeling is conducted according to the characteristics of the mechanical arm, mechanical arm tail end tool load parameters including gravity and the gravity center position are identified, force feedback of a six-dimensional force sensor is obtained, and tool load parameter compensation is conducted; after compensation, force data are substituted into a flexible control strategy module, a pose offset is calculated, a real-time interpolation target track point of the mechanical arm is adjusted, the adjusted target track point is sent to a mechanical arm joint after inverse solution, the joint position and speed in the movement process of the mechanical arm are collected, and load parameter compensation control is automatically carried out; and according to the scheme, when the tail end tool is changed, the gravity and the gravity center position of the tool can be obtained only through the load parameter identification manner, load parameter compensation is automatically carried out, and the working efficiency is improved.

The invention relates to a polyether-loaded N-heterocyclic carbene-palladium compound and a preparation method and application thereof, belonging to the field of organic synthesis. For the polyether-loaded N-heterocyclic carbene-palladium compound, polyether molecular chains contain chain links (I): n in the chain links (I) is equal to 1-10, R is aryl or alkyl, and X is Cl-, Br-, I-, BF4- or PF6-. Compared with polyvinyl benzene, the polyether compound has good main chain flexibility and adjustable branched chain length, and can be used for loading a catalyst to enable the catalyst to maintain higher catalytic activity and enable polymers containing polyepichlorohydin chain links, N-hydroxyl-substituted imidazolium, alkali and palladium salts to react to prepare the compound. The invention also provides the application of the compound: the compound is used for catalyzing substituting reaction of aromatic compounds Aryl-X' and alpha-H contained carboxylic ester to synthesize alpha-aryl carboxylic ester by one-step catalysis, and has mild reaction condition, high yield, good economic benefit and important application value.

A signal processor for providing a processed version of an input signal in dependence on the input signal has a windower configured to window a portion of the input signal, or of a pre-processed version thereof, in dependence on a signal processing window described by signal processing window values for a plurality of window value index values, in order to obtain the processed version of the input signal. The signal processor also has a window provider for providing the signal processing window values for a plurality of window value index values in dependence on one or more window shape parameters.

Relating to the technical field of paint production, the invention provides a preparation method of a polyaniline-epoxy graft modified acrylic ester compound. The method includes: in the presence of a solvent, firstly mixing epoxy resin, a functional monomer, acrylic ester and an initiator to prepare carboxyl-containing epoxy graft acrylic ester resin through a solution polymerization technique; then adding aniline, and carrying out in situ oxidation polymerization of aniline on the carboxyl-containing epoxy graft acrylic ester resin, thus obtaining the polyaniline-epoxy graft modified acrylic ester compound. The formed epoxy graft modified acrylic ester resin concentrates the room temperature curable performance, excellent corrosion resistance, strong adhesion to a substrate and other characteristics of epoxy resin, and the water resistance, weatherability, gloss and color retention, adjustable mechanical performance and other characteristics of acrylic ester resin. The compound is compounded in a molecular level state in an organic solvent, and is stable for long-term storage.

An electronic device is provided. The electronic device includes a hinge, a first housing connected to the hinge, a second housing connected to the hinge so as to fold the first housing, and a display disposed to receive support of at least a portion of the second housing from at least a portion of the first housing through the hinge. The display includes a display panel, at least one polymer member disposed at a rear surface of the display panel, and a conductive plate disposed at a rear surface of the at least one polymer member. The conductive plate includes a first flat portion facing the first housing, a second flat portion facing the second housing, and a flexible portion configured to connect the first flat portion and the second flat portion and disposed to be bendable. The flexible portion includes support pieces spaced apart from each other through slits, and a conductive elastic member configured to connect electrically and physically the first flat portion, the support pieces, and the second flat portion.

The invention relates to a quantum-dot strengthened composite light conversion film and a preparation method thereof, belonging to the field of photoelectric-function high-polymer technical materials. The film material with adjustable flexibility, transparency, luminescent intensity and color is composed of nano cellulose, a plasticizer and water-soluble quantum dots, wherein polyalcohol is used as the plasticizer of the nano cellulose for regulating the flexibility of the film, and the water-soluble quantum dots can account for 0.1-50 wt% of the composite material; and the film has adjustable transparency, flexibility and luminescent color, controllable thickness and cuttable area. The thickness and area of the film material can be scaled up according to application demands. The quantum-dot strengthened composite light conversion film prepared by the method has the advantages of high composite material doping amount, high transparency and high flexibility, and is cuttable and flexible; the luminescent color and luminescent intensity can be adjusted according to the type, size and proportioning of the quantum dots; and the addition of the glycerol can further optimize the flexibility of the film material.

This current collector for a lithium electrochemical accumulator includes an electronically-insulating viscoelastic foam associated with an electroconductive polymer film.

The invention discloses low-viscosity high-reactivity low-volume-contraction modified dipentaerythritol acrylate and a preparation method thereof. The low-viscosity high-reactivity low-volume-contraction modified dipentaerythritol acrylate has a structural formula as shown in the specification. The degree of functionality of the low-viscosity high-reactivity low-volume-contraction modified dipentaerythritol acrylate is 6-9, the viscosity is 300-2000mPa.s, and the molecular weight is 750-2500, so that the low-viscosity high-reactivity low-volume-contraction modified dipentaerythritol acrylate has very high reactivity, lower viscosity, high molecular weight, low migration, high curing efficiency, low volume contraction rate, good adhesive force and adjustable flexibility, and a prepared coating is good in impact resistance and strong in adhesive force; and the preparation method disclosed by the invention is simple and easy to control, and an obtained product is high in purity and good in performance.

The communication apparatus intermittently carries out receiving operation during a predetermined reception period. The apparatus includes a wireless communication section for carrying out wireless communication, which includes a carrier sensor for sensing a carrier at the beginning of the communication, and a carrier sense switching section for using carrier sense levels different between packet transmission and reception to switch the carrier sense level of the carrier sensor according to the packet. Thus, the apparatus can use and flexibly adjust the optimum carrier sense level for the intermittent receiving operation within the reception period.

A catheter that comprises a catheter configured for housing at least a portion of a catheter configured for insertion into a body lumen in proximity of a targeted anatomical site and having an imager at a distal end thereof and an adjustable chamber configured for covering the imager. The catheter is configured for introducing a wave conductive medium to the adjustable chamber to increase wave conductivity between said targeted anatomical site and the imager.

The invention provides a doll toy of which the head part, arm parts and leg parts are slidable and which is stably supported in the standing or sitting pose, wherein a trunk part has a head mounting hole, arm mounting holes and leg mounting holes, where the leg mounting holes each have a central axis obliquely down to the front, the leg parts each have a ring mounting recessed part and a planate sliding contact surface along the peripheral edge of the ring mounting recessed part, where they are inclined to the leg part and a protruded stepping part is formed so as to connect the lower peripheral edge of the sliding contact surface and the upper end of the inner thigh part of the leg part, and the head part, arm parts and leg parts are turnably fit to the trunk part by a connection ring.

The invention relates to a resin microsphere plugging agent and a preparation method therefor. The resin microsphere plugging agent is prepared from the following ingredients in parts by mass: 30-60 parts of alkene monomer, 5-40 parts of ester monomer, 5-10 parts of functional monomer, 0.1-1 part of organic dispersant, 0.3-0.5 part of inorganic dispersant, 0.6-1 part of oil-soluble initiator and 80-120 parts of distilled water. The resin microsphere plugging agent is obtained through adding the organic dispersant and the inorganic dispersant into deionized water, carrying out heating, stirringand mixing, adding the oil-soluble initiator into a mixture of the alkene monomer, the ester monomer and the functional monomer, dissolving the oil-soluble initiator, mixing all the ingredients, carrying out a polymerization reaction so as to obtain a dispersion solution of different particle sizes, and carrying out stirring to cool the dispersion solution to room temperature. According to the resin microsphere plugging agent and the preparation method therefor, the technological operations are simple, and prepared resin microspheres have the advantages of uniform particle size, easy-controlled reaction temperature, high yield, good stability, good flexibility, good transparency, good heat resistance and difficulty in degradation.

The invention relates to a preparation method for a shape memory material based on thermoplastic vulcanized rubber. The preparation method comprises the following steps: (1) fixing a sample strip of ethylene-acrylic acid copolymer / chloroprene rubber blended type thermoplastic vulcanized rubber on a simple stretching clamp, and then preheating the sample strip; (2) applying external force to enablethe preheated sample strip of the thermoplastic vulcanized rubber to deform, afterwards, quickly immersing the sample strip in an ice water mixture for shaping, and recording the distance between scale lines; (3) removing the external force, naturally standing for 24 hours at the room temperature, and recording the distance between the scale lines; (4) arranging the thermoplastic vulcanized rubber in the step (3) in a heating environment, and recording the distance between the scale lines; and (5) calculating the shape fixed rate (SF) and the deformation recovery rate (SR) of the thermoplastic vulcanized rubber. The shape memory material based on the thermoplastic vulcanized rubber prepared by the invention has the advantages of being low in hardness, good in flexibility, easy to shape, recyclable and low in switch temperature and is expected to be applied to sensors and self-assembly equipment.

An attachment for an oscillatory sanding or abrading device has a pair of flexible support members for supporting the sanding or abrading material. The initial radius of curvature of the flexible support member may be adjusted by a pneumatic adjustment mechanism. An opposing pair of generally cylindrical bladders are disposed proximate end portions of the flexible support member, the bladders being releasably attached between the underside of the abrading device and the support member. Adjustment of the initial radius of curvature of the flexible support is accomplished by selectively inflating one or both of the bladders. The radius of curvature of the flexible support member during the sanding process is then a function of the applied pressure or inflation of the bladders. The device allows for virtually infinitely varying adjustments of the curvature of the flexible sheet and the attached abrading sheet.

A signal processor for providing a processed version of an input signal in dependence on the input signal includes a windower configured to window a portion of the input signal, or of a pre-processed version thereof, in dependence on a signal processing window described by signal processing window values for a plurality of window value index values, in order to obtain the processed version of the input signal. The signal processor also includes a window provider for providing the signal processing window values for a plurality of window value index values in dependence on one or more window shape parameters.

The invention discloses a deep ultraviolet electro-catalysis assisted magnetorheological elastomer leveling device and method. A polishing device comprises a polishing disc and a first driving mechanism; a magnetorheological elastomer polishing mechanism and a nozzle are arranged above the polishing disc; a plurality of light source grooves are formed in the upper surface of the polishing disc, deep ultraviolet light sources are arranged in the light source grooves, and a gallium oxide crystal clamping mechanism is arranged above the deep ultraviolet light sources; the nozzle is arranged at the lateral upper portion of the clamping mechanism; the magnetorheological elastomer polishing mechanism comprises a tool shaft, a polishing tool head and a second driving mechanism; and the tool shaft is connected with the polishing disc through a wire and an electric brush. According to the deep ultraviolet electro-catalysis assisted magnetorheological elastomer leveling device and method, a gallium oxide wafer is subjected to efficient, ultra-smooth and lossless polishing through the polishing device, so that a lossless surface with sub-nano-scale roughness can be obtained.

The invention provides a device and a method for acquiring RSRQ (Reference Signal Receiving Quality). The device for acquiring the RSRQ comprises a radio frequency antenna, a signal processor, at least one data selector and a measurer, wherein the radio frequency antenna is used for acquiring a receiving signal of a cell; the receiving signal comprises at least one reference signal; the signal processor is used for processing the receiving signal to acquire a plurality of candidate signals; the plurality of candidate signals have different bandwidths; the at least one data selector is connected with the signal processor; each of the at least one data selector is respectively used for selecting one to-be-measured signal from the lurality of candidate signals; and the measurer is used for acquiring the RSRQ on the basis of the to-be-measured signal. According to the device and the method which are provided by the invention, for different cases, different bandwidths of candidate signals can be selected, and in a suitable environment, a small bandwidth can be selected to measure the RSRQ and good measurement performance can be ensured, and thus, compared with an existing WB-RSRQ measurement method, the method is low in hardware cost and low in power consumption and has adjustable flexibility.