178results about How to "Effective anchoring" patented technology

A coiled anchor for docking a mitral valve prosthesis at a native mitral valve of a heart has a first end, a second end, and a central axis extending between the first and second ends, and defines an inner space coaxial with the central axis. The coiled anchor includes a coiled core including a bio-compatible metal or metal alloy and having a plurality of turns extending around the central axis in a first position, and a cover layer around the core, the cover layer including a bio-compatible material that is less rigid than the metal or metal alloy of the coiled core.

A prosthetic heart valve can include a valve frame having a wireform portion and a stent portion. The wireform and stent portions can be undetachably coupled together via a plurality of upright struts so as to form a one-piece prosthetic heart valve frame. Alternatively, a self-expanding wireform portion and a balloon-expandable stent portion can be coupled together via one or more leaflets and a subassembly having a flexible leaflet support stent and a sealing ring. The wireform portion can include cusps and commissures configured to support a plurality of leaflets. The prosthetic valve can be radially collapsible for minimally invasive and/or transcatheter delivery techniques. Disclosed embodiments can also provide flexion of the wireform portion (e.g., of the commissures) in response to physiologic pulsatile loading when the valve is implanted in a patient's native valve annulus. Methods of making and using prosthetic heart valves are also disclosed.

A barrier assembly includes first, second and third bodies that are vertically stacked. Each body includes a top surface and side surfaces. Inlet ports are formed within the top surfaces. Isolated chambers are formed within and are equidistantly spaced from a center of each body. The bodies include opposed ends that have serrations formed therewith that are interfitted for inhibiting lateral movement of the bodies during collision. The bodies also include indentations formed therein for receiving a user's hands or a fork lift arm, and assisting the user to transport the bodies. Reinforcement rods, formed from non-corrosive material, traverse through the bodies. At least one reinforcement rod is medially seated between the isolated compartments for counterbalancing a combined weight of the bodies. A connector rod is conjoined to the bodies such that the bodies are prohibited from disengaging while experiencing an impact force.

A thread-forming screw includes a screw end, a shank, and a thread-free head, wherein the shank is provided at least partly with a thread and has a pre-forming region, an intermediate region, which is arranged to follow the pre-forming region, and an anchoring region, which is arranged so as to adjoin the intermediate region and below the head, wherein the pre-forming region is arranged so as to directly adjoin the screw end.

A prosthetic shoulder implant includes a humeral component having an anchor and a head, and a glenoid component. The glenoid component is defined by a body having an outer surface including one or more tissue and bone in-growing material areas, a concave inner surface for accepting the head of the humeral component, and defining a stop portion which prevents the head of the humeral component from moving upwardly into contact with the acromion or clavicle. A method of total shoulder arthroplasty includes locating the humeral and glenoid components so that the glenoid component prevents movement of the humeral component into contact with the acromion or clavicle, and such that the glenoid component is permanently anchored to the patient by tissue and bone ingrowth into the outer surface of the component.

A self-mooring module. In particular, a self-mooring module that may be deployed by air, surface or underwater. The module includes a combination anchor/air brake, a buoy, and a mooring line. The module may also include a sensor module. The anchor, combination anchor/air brake and buoy may be used in combination as part of the module or may be used alone in different aspects. The anchor and combination anchor/air brake are foldable to conserve space. The buoy has reduced drag and increased stability versus regular buoys. The self-mooring module may also include an intelligent mooring line module that determines the amount of mooring line to be released for a particular mooring depth and does not release a substantive amount of extra or insufficient mooring line, thereby helping ensure proper placement of an sensor module. Other features include a release mechanism for releasing the anchor from the module and a mechanism for inflating the buoy.

The invention discloses a preparation method of a Ni3Fe-loaded nitrogen-doped carbon nanometer composite material, and a product and applications thereof. The preparation method comprises following steps: 1, a Ni<2+>/Fe<3+>/PVP mixed sol is prepared; 2, the Ni<2+>/Fe<3+>/PVP mixed sol is subjected to electrostatic spinning so as to obtain solid carbon fiber film; 3, the solid carbon fiber film issubjected to pre-oxidation at air atmosphere at 200 to 300 DEG C, programmed heating is adopted for heat processing at 400 to 1000 DEG C at an inert atmosphere so as to obtain the Ni3Fe-loaded nitrogen-doped carbon nanometer composite material. The preparation method is low in cost, is easy, and is universal; the obtained Ni3Fe-loaded nitrogen-doped carbon nanometer composite material is of a one-dimensional composite structure (carbon nanometer fiber and carbon nanotube); Ni3Fe alloy particles can be embedded into the carbon nanometer fiber and carbon nanotube uniformly; the Ni3Fe-loaded nitrogen-doped carbon nanometer composite material can be taken as a water electrolysis hydrogen evolution electrocatalytic material, and possesses relatively high activity and excellent stability.

The invention belongs to the field of catalysts, and discloses a monatomic catalyst, and a preparation method and an application thereof. The preparation method comprises the following steps: (1) synthesizing a SiO2-coated GO composite material by coating SiO2 nanospheres with graphene oxide; (2) synthesizing a SiO2-coated GO-coated PDA composite material by coating the SiO2-coated GO composite material with polydopamine; (3) synthesizing an RGO-coated NC composite material by coating reduced graphene oxide with nitrogen-doped carbon; and (4) synthesizing an RGO-coated NC/Pd monatomic catalystby loading the RGO-coated NC composite material with Pd monatoms. According to the preparation method disclosed by the invention, the overall process flow of the preparation method is set, and the reaction conditions and parameters of each key process step are improved, so that the dispersity, the catalyst activity and the cycling stability of metallic single atom can be effectively improved.

The invention belongs to the field of catalytic materials, and particularly relates to a three-dimensional graphene/ carbon nano tube based molybdenum disulfide/cobaltous sulfide composite material electrocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: step I, treating a precursor: performing ultrasonic treatment on a certainamount of oxidized graphene and a modified carbon nano tube, adding ascorbic acid, thiourea and a metal ion precursor to be uniformly mixed, wherein the metal ion precursor is sodium molybdate and cobalt chloride; step II, performing a hydrothermal reaction process: transferring mixed composite into a reaction kettle, heating the composite to a temperature of 160-200 DEG C, reacting for 20-28 hours at the temperature, conducting cooling to the room temperature to obtain a gel-like black substance, and conducting washing and freeze-drying to obtain a cylindrical black solid. A graphene/ carbonnano tube with a three-dimensional network structure provides a quick electron transfer path and an ion transport channel, and molybdenum disulfide/cobaltous sulfide with a nano structure is anchoredon three-dimensional structural carbon to expose more electro-active sites, so that electrochemical hydrogen evolution property is cooperatively improved.

To increase the barrier effect of a metallized film intended for use I the packaging, in particular of food products, a particular composition of the plastic layer (A) is suggested, on which the metal layer (M) is deposited by vacuum evaporation. The plastic layer comprises a polypropylene and butene copolymer and is subjected to a preliminary surface activation treatment, preferably to a flame treatment, and to a subsequent plasma treatment under partial vacuum conditions prior to metallization.

The invention discloses a socket-and-spigot joint structure of a prefabricated pier column and a bearing platform adopting high-strength steel fiber reinforced concrete caulking and a construction method. The invention is characterized in that a socket groove is reserved in the position, corresponding to a pier column, of the top of the bearing platform, a prefabricated pier column is hoisted andinserted into a socket groove, high-strength steel fiber reinforced concrete caulking is poured into a gap between the periphery of the pier column and the wall of the socket groove, and firm connection is achieved. The connecting structure of the pier column and the bearing platform is simple, high in embedding and fixing efficiency, convenient to install and operate, relatively low in prefabricating and embedding precision control requirement, high in construction efficiency and safe and reliable in stress, and meanwhile the anti-seismic property of the connecting structure is similar to that of a cast-in-place structure.

The invention discloses a large-tonnage FRP stay cable anchoring method. The method comprises steps: forming a taper variable stiffness load transmission medium on a FRP stay cable anchoring region, wherein the variable stiffness load transmission medium being formed by fiber yarns which are winded along a length direction of the FRP stay cable anchoring region in a segmented manner through mouldpressing, heating, and solidifying, using fiber yarns in different kinds in different segments, to form variable stiffness load, the fiber yarns being soaked by resin before being winded; along an axial direction of the variable stiffness load transmission medium, cutting a plurality of kerfs; using a taper anchorage device matched with the taper variable stiffness load transmission medium to anchor. The anchoring method is advantaged by simple manufacturing, easy control, good coordination force property, high anchoring efficiency, continuous variation of load transmission medium stiffness, and more uniform load transmission medium stiffness. Fiber content and transverse stiffness of the variable stiffness load transmission medium gradually increase from a loading end to a free end, to relieve or eliminate notch effect of the loading end of the FRP stay cable, and prevent lateral shearing damages from preceding tensile damages of the large-tonnage FRP stay cable caused by stress concentration.

The invention relates to a connector for hollow portions of profile member(s), comprising two bars connected by a contact pad and intended to be inserted into the free ends of the hollow portions of profile member(s), each bar being provided with anchoring blades arranged so as to engage with the profile member(s) so as to mechanically attach the latter to the connector, and sealing blades arranged so as to engage with the profile member(s) in order to form a damp-proof course in the profile member(s). The invention also relates to a double-pane window, the frame of which consists of hollow portions of profile member(s) connected together by such a connector.

To anchor a fixture in a jaw bone, the fixture is applied in a hole which is substantially smaller than the diameter of the fixture. The fixture has a front portion which from the point of view of diameter grows very much narrower and which is arranged with both a cutting function and a threading function. The fixture is provided with a thread, with one, two or more thread turns extending down along the greatly narrowing portion while substantially maintaining their thread profile. One or more porous layers arranged on the thread turns can also be included. In this way the fixture can exploit the clamping effect from the soft parts of the jaw bone and still effectively penetrate through any hard parts possibly present in the jaw bone, without these hard parts being pressed inward upon fixture application. An effective fusion of the fixture in the jaw bone is achieved with the aid of said porous outer layers.