807results about How to "Reduced risk of clogging" patented technology

PCT No. PCT / DE96 / 02213 Sec. 371 Date Jul. 16, 1998 Sec. 102(e) Date Jul. 16, 1998 PCT Filed Nov. 20, 1996 PCT Pub. No. WO97 / 18745 PCT Pub. Date May 29, 1997A cutting apparatus is provided with both a rotating inner blade and a stationary outer blade at its distal end and is connected to a drive unit disposed in the proximal region. The outer blade is spaced from the inner blade to form an irrigation passage through which an irrigation liquid is passed. A flushing duct is provided for fluid communication to the distal end. Additionally, a suction passage is provided to exhaust tissue particles.

A holding device for locking the head of a syringe piston on a pusher has arms connected to respective pinions pivotable and translationally displaceable so that the corresponding arm is involved in the same motion between a rest position, in which the arms are closed and pressed against the pusher, and an open position, in which the arms are opened and remote therefrom, the translation is carried out prior to rotation during the movement toward the open position or in reverse order toward the rest position. The holding device also has a control member and means for converting a part of the control member movement by transmitting it to at least one pinion as a translation movement, which are translationally locked, and means for converting a part of the control member movement by transmitting it to at least one pinion as a rotation movement.

A fluid management system for the treatment of ascites, pleural effusion or pericardial effusion is provided including an implantable device including a pump, control circuitry, battery and transceiver; a charging and communication system configured to periodically charge the battery and communicate with the implantable device to retrieve performance data; and monitoring and control software, suitable for use with conventional personal computers, for configuring and controlling operation of the implantable device and charging and communication system. The implantable device includes a number of features that provide automated movement of fluid to the bladder with reduced risk of clogging, with no patient involvement other than occasional recharging of the battery of the implantable device. The monitoring and control software is available only to the treating physician, such that the physician interacts with the implantable device via the charging and communication system.

A static material mixer is composed of one or more mixing structures with mountain-like projected parts. The cross-section of the external surface of said mixing structure is circle or polygon. Its inside has two or more mountain-like projected parts and discharge outlets, which are alternatively arranged. The mountain-like projected parts and discharge outlets between adjacent mixing structures are staggered. It can cut, mixing and move the materials and can make collision between material and the mixer or material, resulting in high mixing effect.

The invention discloses a method for multistage sand prevention of ocean natural gas hydrate depressurization production. The method comprises a step S1 of adopting low production pressure difference to perform depressurization production, first decomposing and exploiting hydrate of an earth layer outside a sleeve pipe and close to a well, discharging mud and silty sand ingredients of the earth layer, and only making uniform sand which is good in grain size and good in sorting coefficient remain; a step S2 of performing filling outside a pipe, squeezing the mud-removed coarse sand belt to the periphery of a gravel layer to achieve an effect of a primary sand-blocking barrier; making a filling belt outside the pipe serve as a secondary sand-blocking barrier; a step S3 of selecting gravel with the dimension larger than a filling pipe outside the pipe by one grade to perform filling in the pipe, and making the filling layer in the pipe achieve an effect of a third-stage sand-blocking barrier; making an internal sand-blocking screen cloth serve as a fourth-stage sand-blocking barrier; and a step S4 of performing step type step-by-step enlargement of production pressure differential to a set value. The sand prevention problem caused by high mud content of an ocean hydrate layer and large pressure drop range is solved fundamentally, the problem of difficulty in forming a downhole filling belt sand bridge is solved through step type enlargement of production pressure differential, and the hydrate well productivity is improved.

The invention discloses a capture sieve and a device for capturing cells or biomolecules in solutions. The capture sieve comprises a net-shaped base body and a capture layer formed on the net-shaped base body, wherein the capture layer comprises capture matter which can be in specific binding with target cells or biomolecules. The capture sieve and the device provided by the invention have high specificity and high flux, are suitable for capturing the cells or capturing the biomolecules in the solutions by adopting the molecules expressed by the cells, and are particularly suitable for capturing and sorting circulating tumor cells.

The embodiment of the invention discloses a containment sump filter, comprising a plurality of filter modules which comprise a filter cartridge and a base; the invention is characterized in that: the containment sump filter also comprises a plurality of pipeline modules, the two ends of each pipeline are open, the pipeline modules forms a pipeline part by being connected with each other in an end-to-end way, the pipeline part is communicated with a plurality of pump inlets in the containment vessel pit and the two ends thereof are respectively connected with a plurality of filter modules which are connected with each other by the bases in an end-to-end way, so that the fluid passage formed by the bases of the filter modules at the two ends of the pipeline part can be communicated with the fluid of the pipeline part formed by the pipeline module. With the containment sump filter of the embodiment adopted, the filtration area in the flow passage of the refrigerant is increased remarkably without being restricted by the inlet location of the pump in the containment sump filter and at the same time, the risk of jam of the containment sump filter Is reduced.

A sidestream gas sampling system that includes a conduit that communicates a flow of gas to a gas measurement site. A gas measurement assembly measures a constituent of the flow of gas at the gas measurement site. A capillary tube communicates the flow of gas from the gas measurement site. A differential pressure transducer in fluid communication with first and second portions of the capillary tube measure a pressure differential between these two portions. A controller is coupled to the differential pressure transducer to measure the flow of gas based on the output of the differential pressure transducer and to control the flow of gas via a flow generator coupled to the gas flow path.

A flushometer for use with urinals or water closets includes a hollow valve body having an inlet, an outlet, and a valve seat therebetween. There is a piston or diaphragm movable in the hollow valve body to a closing position on the valve seat to control flow through the valve. A pressure chamber is above the piston or diaphragm for holding it on the valve seat. The piston or diaphragm includes a plurality of bypass orifices to connect the inlet with the pressure chamber to provide fluid to move the piston or diaphragm to the closing position.

The embodiment of the invention discloses a consensus method of block chain data, which comprises the following steps that: a proposal node receives signature information sent by a plurality of votingnodes respectively, and the signature information comprises signatures of blocks to be confirmed by the voting nodes by using a BLS signature algorithm; whether the number of the received signature information reaches a preset value or not is judged; if yes, the received plurality of pieces of signature information is utilized to aggregate and generate an aggregate signature by using a BLS signature algorithm; and the aggregation signature is sent to the voting node, so as to ensure that the to-be-confirmed block is valid when the voting node verifies the aggregation signature successfully. The embodiment of the invention further discloses a consensus system and device for the block chain data. Wherein an aggregation signature is generated by using a BLS signature algorithm in the consensus process of the block chain, signature votes from all the voting nodes can be aggregated, and the consensus process of the block chain is simplified, so that the risk of blockage in the network is reduced.

The invention discloses an aluminum-particle-based method for preparing a coating by cold spray deposition in the technical field of metal material coatings. Helium is used as a working gas and a carrier gas, and high-purity aluminum powder is sprayed onto a matrix subjected to iron silicate particle blasting treatment by using a spray gun to realize coating preparation. Various defects in the prior art, particularly in the thermal spraying aluminum coating preparation process are overcome, risks of small-size particles in storage and cold spray processes are overcome, and the cost of aluminum powder particle deposition is effectively reduced.

The invention provides a transcatheter aortic valve and preparation method thereof. The transcatheter aortic valve comprises a radially telescopic reticular valve frame, pedal skirts and multiple lobes, wherein the petal skirts are arranged on the inner side of the petal holder, the lobes are located in the lumen of the valve carrier, wherein the petal skirt is divided into a first region and a second region, the first region faces an inflow end of the aortic valve, the second region faces the outflow end of the aortic valve and the second region is provided with a mesh hole capable of communicating the inside and outside of the valve frame. The transcatheter aortic valve provided by the invention solves the problems that the coronary orifice is easy to be blocked after the aortic valve isimplanted in the prior art and the aortic valve is suitable for a patient.

The invention relates to an aerosol delivery system for delivering aerosolised medicament particles to a user comprising a cartridge and a device configured to receive the cartridge. The cartridge comprises: a first compartment comprising a delivery enhancing compound source; a second compartment comprising a medicament source; a vaporiser for heating the medicament; and a transfer element for conveying the medicament from the second compartment to the vaporiser. The cartridge may further comprise an aerosol forming chamber in fluid communication with the first compartment and the second compartment. The device comprises: an outer housing; a power source; temperature controlling means for controlling the temperature of the first compartment of the cartridge; and electronic circuitry configured to control power to the temperature controlling means from the power source. The electronic circuitry is configured to maintain the first compartment of the cartridge at a temperature of between about 30DEG C and about 50DEG C. In use, the medicament reacts with the delivery enhancing compound in the gas phase to form aerosolised medicament-containing particles.

An water-permeable concrete brick suitable for high-load pavement features that the polymer and high-hydroscopicity and-strength shale ceramsite are used to modify the sand-free porous cement concrete for improving elasticity, adhesive to aggregate, mechanical performance and durability.

The invention relates to a webpage rendering method and device. The webpage rendering method comprises the following steps: under the condition that a request, for visiting a target webpage, transmitted by a user is received, establishing communication connection with a server of the target webpage; under the condition that the communication connection is successfully established, receiving a static template from the server, of the target webpage, and rendering the static template; representing the rendered static template to the user; transmitting a request of acquiring dynamic data of the target webpage to the server, and acquiring the dynamic data of the target webpage from the server. By adopting the webpage rendering method of the embodiment of the invention, the purpose that the time of responding to the user is shortened for a first time can be achieved.

Prosthetic mitral valves described herein can be deployed using a transcatheter mitral valve delivery system and technique to interface and anchor in cooperation with the anatomical structures of a native mitral valve. This document describes prosthetic heart valve designs and techniques to manage blood flow through the left ventricular outflow tract. For example, this document describes prosthetic heart valve designs and techniques that reduce or prevent obstructions of the left ventricular outflow tract that may otherwise result from systolic anterior motion of an anterior leaflet of the native mitral valve.

A fluid management system for the treatment of ascites, pleural effusion or pericardial effusion is provided including an implantable device including a pump, control circuitry, battery and transceiver; a charging and communication system configured to periodically charge the battery and communicate with the implantable device to retrieve performance data; and monitoring and control software, suitable for use with conventional personal computers, for configuring and controlling operation of the implantable device and charging and communication system. The implantable device includes a number of features that provide automated movement of fluid to the bladder with reduced risk of clogging, with no patient involvement other than occasional recharging of the battery of the implantable device. The monitoring and control software is available only to the treating physician, such that the physician interacts with the implantable device via the charging and communication system.

A system for noninvasively monitoring cancerous cells within bodily fluid accumulated due to ascites, pleural effusion or pericardial effusion is provided including an implantable pump having control circuitry; a charging and communication system configured to periodically charge and communicate with the implantable pump to retrieve performance data; and monitoring and control software, suitable for use with conventional personal computers, for configuring and controlling operation of the implantable pump and charging and communication system. The implantable pump is configured to move fluid containing cancerous cells from a body cavity to the bladder such that the fluid may be excreted during urination, collected and analyzed with an analysis station to assess progress of the cancer or efficacy of a cancer treatment program.

The invention discloses a method for capturing cells or biomolecules. The method comprises the following steps: (I) enabling a medium containing target cells or biomolecules to enter a device comprising a capturing mechanism for capturing the target cells or biomolecules; (II) enabling the medium to flow through the capturing mechanism so that the target cells or biomolecules are bound to the capturing structure; (III) removing the needless impurities, cells or molecules which are not specifically bound to the capturing mechanism; (IV) enabling the target cells or biomolecules to be separated from the capturing mechanism; and (V) collecting the target cells or biomolecules. The capturing mechanism comprises one or more stacked capturing sieves, wherein each capturing sieve comprises a net-shaped base body and a capturing layer formed on the net-shaped base body, and the capturing layer contains capturing matter which can be in specific binding with the target cells or biomolecules. The method disclosed by the invention has high specificity and high flux, is suitable for capturing the cells or capturing the biomolecules in the solutions by adopting molecules expressed by cells, and is particularly suitable for capturing and sorting circulating tumor cells.

The invention discloses a self-cleaning dust remover, which comprises a box body, an air inlet is formed in the side wall of the box body in a penetrating mode. The inner bottom of the box body is rotationally connected with a transmission shaft; a plurality of rotating blades are fixed to the circumferential side wall of the upper portion of the transmission shaft, an upper sealing ring in sealedsliding connection with the top in the box body is fixed to the ends, away from the transmission shaft, of the rotating blades, a filter screen is fixed to the bottom of the upper sealing ring, and alower sealing ring in sealed sliding connection with the bottom in the box body is fixed to the bottom of the filter screen. The method has the advantages that an air control plate is provided with asingle-side arc surface; the flow rates of the two sides of the air control plate are different when airflow flows through the air control plate; the air pressure difference is generated between thetwo sides of the air control plate, the filter screen vibrates under the impact of the push block, dust on the filter screen is separated from the filter screen through the impact of the push block onthe filter screen, self-cleaning of the filter screen is achieved, and the filter screen keeps a good filtering effect in the long-time use process.

The invention concerns a beverage machine comprising a casing (32) enclosing: - a first part (34) for receiving an ingredient capsule therein, - a second part (70) having a surface (91) provided with perforating projecting members (90) facing the first part, - an opening (76) in the casing enabling the capsule to be inserted in a direction of insertion (Z) between the first and second parts, the first and second parts being movable relative to each other along a longitudinal axis (X) perpendicular to surface (91) between a first position in which first and second parts are spaced apart so that the ingredient capsule is inserted therebetween and a second position in which first and second parts are close to each other so that the capsule is in contact with the member.; The members (90) are provided in an arrangement on the surface with respect to the opening (76) so as to permanently reduce the risk of trapping of the capsule by the members during the capsule insertion.

The invention relates to a method for maintaining flow conductivity of multi-slit fracturing seams in a horizontal well section. The method comprises the steps of firstly, preparing a temporary plugging steering working solution, wherein the temporary plugging steering working solution comprises degradable temporary plugging agents, degradable fiber, an equidensity proppant and a low-viscosity carrying liquid; carrying out staged fracturing, wherein the pump injection sequence is a prepad fluid, a sand-carrying fluid and the temporary plugging steering working solution; and after complete fracturing, waiting till the temporary plugging steering working solution is degraded, carrying out fluid drainage, and ensuring that the proppant remains at the seams and forms a seepage channel. According to the method, the plugging efficiency is improved and the seepage loss of liquids among the seams is reduced through adopting the multi-scale degradable temporary plugging agents; after construction, the degradable temporary plugging agents and the degradable fiber in the temporary plugging steering working solution are completely degraded under the action of the bottom hole temperature; the proppant maintains the flow conductivity of a near mineshaft; and the method is applicable to conventional hydraulic fracturing staged reconstruction, unconventional staged fracturing reconstruction, uncrushed perforation cluster reconstruction of a new well, repeated fracturing reconstruction of an old well, and various technologies of staged reconstruction of a horizontal well.

The invention relates to a novel sufficient metal air battery oxygen electrode and a preparation method thereof, belongs to a high performance chemical electric power source and the relative field. The oxygen electrode and the preparation method can be used for solving technical problems of eliminating the phenomenon that a reaction is stopped caused by an oxidative product deposits on a gas path when metal is discharged, the reaction efficiency and loop stability of the oxygen electrode of a chargeable metal air battery are effectively improved, a three-phase reaction interface is reduced, and poison of moisture in the air to an electrode reaction and corrosion to an electrode are reduced. In the technical scheme provided by the invention, a gas micro channel is adopted to reduce moisture in the air, a gas distribution plate is used for improving airflow direction and a gas distribution state, a hole carbon material and an array materials combine to form a high efficiency three dimensional electrode, and a cathode reaction chamber is separated from a metal anode through a diaphragm. The oxygen electrode provided by the invention has the advantages of high catalytic reaction efficiency, good loop stability, short diffusion distance of gas and metallic ions, full air liquid solid three-phase contact; and unblocked gas path, reasonable gas distribution, strong metal oxide deposition resistance, good mass transferring and diffusion process effect, strong operability, and is suitable for a high energy density power supply occasions in a long term repeatedly.

The invention provides an acid in-situ leaching uranium mining laboratory simulation device. The acid in-situ leaching uranium mining laboratory simulation device comprises a leaching agent storage tank, a leaching column, a leaching liquid storage tank, an ion exchange column, a leaching agent preparation tank, a pump, a valve A, a valve B, a valve C, a valve D, a valve E, a valve F, a valve G and connecting pipes, wherein the leaching agent storage tank is used for storing a leaching agent; the leaching column is used for containing an ore sample and providing a site for a contact reaction between the leaching agent and ore; the leaching liquid storage tank is used for containing leaching liquid; the ion exchange column is used for containing an adsorption material of uranium; the leaching agent preparation tank is used for containing the leaching liquid generated after the uranium is adsorbed by resin; the pump is used for conveying the prepared leaching agent into the leaching agent storage tank; and the connecting pipes are used for connecting all the components. The invention further provides a test method adopting the acid in-situ leaching uranium mining laboratory simulation device. Test results of the device and the test method can provide reliable basis for in-situ test engineering leaching agent preparation and the leaching technique, the risk that according to an in-situ test leaching system, an ore bed is blocked due to accumulation and sedimentation of impurity ions is reduced, and the prevention level is improved.

The invention provides a method for treating an eutrophication water body by utilizing an artificial marsh and a facility thereof. The method comprises the following steps that: an eutrophication water body to be treated is sent to an upflow type coarse filtering bed by a pumping and collecting pipeline; the upflow type coarse filtering bed carries out removing treatment to suspended substances and algae substances in the eutrophication water body; the water body treated by the upflow type coarse filtering bed is evenly distributed to a vertical flow ecological filtering bed by a water feeding and distributing system and subject to secondary biochemical treatment by the vertical flow ecological filtering bed; effluent water is recycled and reused; deposited sludge in the upflow type coarse filtering bed is discharged to a sludge drying filtering bed for stabilization treatment; and a wet sludge filtrate reflows to the upflow type coarse filtering bed for aftertreatment. The proposal of the invention adopts a method of combining the upflow type coarse filtering bed, the vertical flow ecological filtering bed and the sludge drying filtering bed to treat the eutrophication water body, can not only effectively remove the suspended substances and the algae substances but also solve the problem of treating blue algae sludge with low cost, has the characteristics of good algae removing effect and large water treatment amount and is widely suitable for the long-term water purification of the eutrophication water body.

The invention discloses a method for continuously preparing organic isocyanate. The method comprises the steps of: preparing an impinging stream reactor and a static mixer, wherein the impinging stream reactor comprises an outer cylinder, feed nozzles are arranged on the upper part of the outer cylinder, and a discharge outlet is arranged on the bottom of the outer cylinder; dissolving organic primary amine and phosgene into the same inert organic solvent respectively, adding the obtained solution into the outer cylinder through the feed nozzles for a phosgenation reaction, and ensuring that the average retention time of materials does not exceed 30s; and introducing the material discharged from the discharge outlet of the impinging stream reactor from a feed inlet of the static mixer provided with a heat exchange device for a reaction to generate a crude product of the organic isocyanate, wherein the average retention time of the material is less than 30min. The method of the invention utilizes good micromixing property of the impinging stream reactor to improve the mixing efficiency of raw materials, reduce the production cost of isocyanate and improve the production capacity ofthe isocyanate. The reactor of the invention has a simple structure, reduces the danger of solid blockage, is easy to seal, and reduces the danger of phosgene leakage.

Devices for expanded bed chromatography use inlet and outlet ports beneath a mesh that supports sorbent beads in a column. Placement of both ports beneath the mesh provides a horizontal “sweep flow” tangential to the mesh, to suppress the formation of particulate cakes on the lower surface of the mesh when liquids containing high particulate loads (such as cells or cell debris) are being processed. This design can be used with vibrators, hammering devices, intermittent reverse flow, or other means for disrupting the formation of particulate cakes or aggregates. Disrupters can also be used during elution, to accelerate the release of the valuable molecules from the sorbent. Initial tests indicate that these systems can efficiently handle heavily loaded liquids that would rapidly clog other systems previously known in the art.

An implant deployment device (10) includes a pusher member (30), inner catheter (24), dilator tip (20) upon which an implant (18) is supported during deployment into a lumen of a patient. A sheath (32) substantially surrounds the pusher member (30), the inner catheter (24), the dilator tip (20), covering the implant (18) and containing the implant (18) therewithin. The pusher member (30), inner catheter (24), dilator tip (20) has at least one longitudinal groove formed in its outer surface. This engages with at least one tooth (112) formed in an inner surface of the sheath (32) or an inner surface of a component of the device that is attached to the sheath (32), such as a clamping collar (90) or a locking unit (100). The tooth (112) engages with a longitudinal groove (80) and is able to move along the groove (80) in a longitudinal direction. The engagement of the tooth (112) within the groove (80), however, prevents relative rotation between the sheath (32) and the pusher member (30), inner catheter (24), dilator tip (20). Twisting of an implant (18) supported on the inner catheter (24) is thus avoided.