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1451results about How to "Prevent sinking" patented technology

Preparation for repairing cartilage defects or cartilage/bone defects in human or animal joints

InactiveUS6858042B2Reduce absorptionResistant to resorptionBone implantJoint implantsRepair tissueCyst
Repairs of cartilage defects or of cartilage/bone defects in human or animal joints with the help of devices including a bone part (1), a cartilage layer (2) and a subchondral bone plate (4) or an imitation of such a plate in the transition region between the cartilage layer (2) and the bone part (1). After implantation, the bone part (4) is resorbed and is replaced by reparative tissue only after being essentially totally resorbed. In a critical phase of the healing process, a mechanically inferior cyst is located in the place of the implanted bone part (1). In order to prevent the cartilage layer (2) from sinking into the cyst space during this critical phase of the healing process the device has a top part (11) and a bottom part (12), wherein the top part (11) consists essentially of the cartilage layer (2) and the subchondral bone plate (4) and the bottom part (12) corresponds essentially to the bone part (1) and wherein the top part (11) parallel to the subchondral bone plate (4) has a larger diameter than the bottom part (12). After implantation in a suitable opening or bore (20), the cartilage layer (2) and the subchondral bone plate (4) are supported not only on the bone part (1) but also on native bone tissue having a loading capacity not changing during the healing process. Therefore, the implanted cartilage layer cannot sink during the healing process.
Owner:ZIMMER GMBH

Artificial hip joint consisting of multilayer shell core composite structural components

The invention discloses an artificial hip joint consisting of multilayer shell core composite structural components. The artificial hip joint comprises an artificial acetabulum and an artificial thigh bone. The artificial hip joint is characterized in that: the artificial acetabulum has a multilayer shell core composite structure and consists of a ceramic acetabulum lining, a transition layer, a porous metal, a porous alloy or a porous toughened ceramic acetabulum shell; the artificial thigh bone has a multilayer shell core composite structure and consists of a ceramic spherical shell layer, a transition layer and a toughened ceramic inner core. The ceramic acetabulum lining and the spherical shell layer of the artificial thigh bone have high hardness, corrosion resistance and abrasion resistance; the artificial acetabulum shell layer and the inner core of the thigh bone have high toughness and impact resistance; and the transition layers are made of gradient composite materials between the materials for the shell layer and the inner core layer, and have the functions of increasing the bonding strength between the shell layer and the inner core layer, reducing the interface stressbetween the shell layer and the inner core layer and the like. The artificial hip joint has the characteristics of long service life, high reliability, high performance and the like.
Owner:SUZHOU DINGAN ELECTRONICS TECH

Exterior wall waterproofing heat-insulating decorating integrated material and preparation method thereof

InactiveCN105694625AMeet various style requirements of high-end and high-end exterior finishesShort construction periodFireproof paintsAnti-corrosive paintsPolymer scienceSludge
The invention relates to an exterior wall waterproofing heat-insulating decorating integrated material and a preparation method thereof.The preparation method includes: using conventional resin like polyurea and polyurethane as raw materials, adding compound micropowder prepared from solid waste and sludge, and adding a mixed modifier and a thixotropic agent to prepare A-compound slurry; adding a promoter and a hardener, and performing spray coating, brush coating, roll coating and pouring methods to obtain the exterior wall waterproofing heat-insulating decorating integrated material.The material has the comprehensive advantages of good waterproof effect, high heat insulativity, high hardness, high hole closing rate, low density, good anti-seepage performance, high corrosion resistance, low linear expansion coefficient, high softening temperature, oxidization resistance, aging resistance, flame retardancy and firmness in binding with a substrate.When the material is used for building exterior walls, multiple times of leveling, waterproofing, heat insulating and decorating construction are not needed, on-site moisture-free operation and one-time forming can be realized, and the material is short in construction period, extremely low in cost and great in market prospect.
Owner:NANJING KAIBA ADVANCED MATERIALS CO LTD +1

Fracturing method capable of improving sand-carrying performance of fracturing liquid

The invention provides a fracturing method capable of improving the sand-carrying performance of fracturing liquid. The method comprises the following steps: dispersing degradable fibers by virtue of a dispersion device, and uniformly dissolving the dispersed degradable fibers in a fracturing liquid base solution; pumping into a fracturing blender truck, and mixing with a propping agent for fracturing so as to form sand-carrying fluid; then pumping the sand-carrying fluid dissolved with the fibers into a strata so as to support a formed fracture geometry. When the degradable fibers added into the fracturing liquid are uniformly dispersed in the fracturing liquid, the fibers and a guanidine gum chain with a network structure form a tangled structure, so that the strength of the cross-linked network structure is enhanced, the sedimentation rate of the propping agent is reduced, the sand-carrying capacity of the fracturing liquid is improved, the propping agent is uniformly distributed in a whole crack, a supporting effect is fully realized, the crack is prevented from being closed and thus the fracturing period of validity is increased; furthermore, the added fibers are capable of effectively preventing the propping agent from flowing back and preventing formation sand flow; an oil gas flow passage is additionally increased, so that the fracturing yield-increasing effect is finally realized.
Owner:中石化胜利油田分公司采油工艺研究院 +1

Concrete integral pouring construction method and device for road inspection well

InactiveCN101718101APrevent slippingResistance to the effects of horizontal thrustArtificial islandsUnderwater structuresProduct inspectionReinforced concrete
The invention provides concrete integral pouring construction method and device for a road inspection well. The method comprises advance constructions and post constructions, wherein the advance constructions comprise the following steps of: measuring and paying off; excavating a wellhole; pouring a reinforced concrete foundation bottom and building a wellhole protection wall; connecting pipelines; building a well chamber; mounting a tread; backfilling well perimeters; reserving a branch pipe; building a close up section; mounting a cover plate; building the wellhole; covering and protecting; backfilling cement and stone dust to the well perimeters; and constructing a pavement basic layer. The post constructions comprise the following steps of: excavating the pavement basic layer covered on the wellhole to expose the wellhole, dismantling the cover plate and excavating a concrete foundation pit by using the wellhole as a center, wherein the radius of the excavated foundation pit two times larger than or equal to that of the wellhole; laying reinforcing steel bars in the foundation pit and supporting an inner mold in the wellhole; overhanging a well cover on the wellhole by a fixing bracket overhanging device; adjusting the altitude of the well cover; pouring concrete into the foundation pit and keeping the height of the concrete parallel to the bottom of the well cover; building the perimeters of the well cover into a cement slope by concrete; carrying out acceptance checks; paving a bituminous pavement on the perimeters of the well cover and keeping the bituminous pavement parallel to the well cover.
Owner:JINAN URBAN CONSTR GRP

Elements of a femoral prosthesis with a modular neck, tooling for implanting a femoral prosthesis and method of implantation

A modular assembly for a femoral prosthesis comprises a femoral prosthetic implant forming a spindle of elongate and tapered shape and a one-piece neck. The implant consists of a diaphyseal lower part and a metaphyseal upper part having a flat face delimited by an outer edge and in which a cavity is formed. The neck is formed of a tenon having a shape corresponding to the cavity, said tenon being fitted into the cavity along an insertion axis YY perpendicular to the flat face and a rod provided with an interface for fixing a cup that is to be inserted into the acetabulum of the hip bone. The rod is provided with a tongue which protrudes parallel to the flat face in a radial direction with respect to the insertion axis and directed towards the interior of the obtuse salient angle, at a distance from the flat face of between 0.3 mm and 1.5 mm measured along the insertion axis, the tongue having a free end located at a greater distance from the insertion axis than the part of the edge located opposite the tongue. The free end of the tongue overhangs somewhat with respect to the outer edge of the flat face of the femoral prosthetic implant, in such a way as to ensure that, in the event of sinking of the implant into the medullar cavity, the tongue will come into abutment against the femoral calcar.
Owner:CERAM CONCEPT L L C

Bored pile construction method for reinforcing cage framework layered installation

InactiveCN103615001AAvoid hitting the hole wallAvoid deformationBulkheads/pilesRebarBuilding construction
The invention discloses a bored pile construction method for reinforcing cage framework layered installation. The bored pile construction method for reinforcing cage framework layered installation comprises the steps of (a) making preparation for construction, (b) setting out a pile position, (c) manufacturing a pile casing and pre-burying the pile casing, (d) drilling a bore, (e) reinforcing a dado, (f) cleaning the bore for the first time, (g) manufacturing reinforcing cage frameworks and installing the reinforcing cage frameworks in a layered mode, (h) placing a guide tube, (i) cleaning the bore for the second time, (j) pouring concrete, (k) recycling the pile casing and (l) backfilling the pile bore. According to the bored pile construction method for reinforcing cage framework layered installation, the reinforcing cage frameworks are placed in the bore in a layered mode, aligned one by one and welded, so that a reinforcing cage is installed, and a traditional method that the reinforcing cage is directly installed is replaced; the reinforcing cage can be stably placed in the bore, and the reinforcing cage is prevented from colliding against the wall of the bore and prevented from deforming; in addition, the reinforcing cage can be accurately located to the center of a bore site, and the reinforcing cage is prevented from floating or sinking in the process of concrete pouring. Besides, by the adoption of the bored pile construction method for reinforcing cage framework layered installation, the speed is high, a construction period is short, and the quite high scientific performance and the feasibility are achieved.
Owner:NINGBO SHENGHONG CONSTR ENG

Surface drilling pressure relief gas extraction and overlying strata isolated grouting filling synchronous implementing method

The invention provides a surface drilling pressure relief gas extraction and overlying strata isolated grouting filling synchronous implementing method, and is suitable for extraction and filling under a building. A plurality of grouting drilling holes are formed in the surface and above the middle of a working face before exploitation of the coal working face, a plurality of gas extraction drilling holes are formed in the surface and above a boundary, overlying strata grouting filling is implemented by the grouting drilling holes in the exploitation process of the coal working face, pressure relief gas of an upper adjacent coal seam can be extracted by the gas extraction drilling holes, a gas extraction channel is isolated from a grout flowing channel by barrier action of a top upper adjacent coal seam, and synchronization of grouting and extraction is realized until grouting filling and gas extraction of all the drilling holes in the whole coal working face are finished. Pressure relief gas extraction and overlying strata grouting filling can be implemented synchronously, problems of grout filling and gas flowing disturbance are solved, and subsidence can be controlled while the gas is extracted.
Owner:CHINA UNIV OF MINING & TECH

High-efficiency photobioreactor for cultivation of photosynthetic bacteria

The invention discloses a high efficient photo-bioreactor for the culture of photosynthetic bacteria, which consists of a control system, a transparent cylindrical barrel body, an internal light source, an internal modulator tube sleeve brush, a water circulation flow guide device, a heating device and an electronic cooling device. The photo-bioreactor is characterized in that: the system is totally sealed; the internal light source and an external natural light source can be utilized simultaneously, the internal light source is arranged at the centre of the barrel body and protected by a quartziferous modulator tube sleeve, and the outer wall of which is provided with the lift type annular brush; the water circulation flow guide device is positioned at one side of the barrel body and comprises a mini submerged pump and a water circulation guide pipe; the lower end of the water circulation guide pipe is connected with a pump and the 1/3 upper part is provided with a column of water circulation outlets, direction of which is not vertical to the tangent plane of the barrel wall at the closer side, thus ensuring liquid in the reactor is fully stirred under anaerobic conditions; and the heating device and the cooling device are integrated in the water circulation guide pipe. The photo-bioreactor has convenient operation, low cost and safe production and can fulfill high efficient and continuous culture of photosynthetic bacteria.
Owner:SHANGHAI OCEAN UNIV
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