109 results about "Core needle" patented technology

A biopsy device includes a cutting cannula mechanism having a cutting cannula and an inner stylet mechanism having an inner stylet coaxial with the cutting cannula. A cocking mechanism is configured to cock the cutting cannula mechanism and the inner stylet mechanism by retracting each of the cutting cannula and the inner stylet in a proximal direction to a cocked position. A trigger device is configured to fire at least one of the inner stylet mechanism and the cutting cannula mechanism to advance a respective at least one of the inner stylet and the cutting cannula from the cocked position in a distal direction. A selector assembly includes a selector switch having an exterior tab accessible by a user. The selector assembly is configured to select between at least two user selectable operating modes and at least two user selectable firing distances.

The invention relates to a worn out battery open machine, it is equipped with the positioning device, the saw cut installment and clush core installment on the rack. It is equipped with the primary wheel and accessory mark in the positioning device, and on the primary wheel and accessory mark separately equipped with the index hole and the battery pot holes, the sawblade installed on the saw cut installment, in clush core installment equipped with clush core needle, clush shell needle and guide pin, clush core needle, clush shell needle and guide pin and the guide pin correspond with the primary wheel and accessory mark on the positioning device. The machine structure novel, ease of operation, opens wornout battery quickly, the opened battery waste material can recycle and regeneration use, in the opening process not cause secondary pollution, and high opening efficiency; the machine is an environmental protection technology with developping prospect.

The invention relates to a flat plate free liquid level coaxial electrostatic spinning method and device, in particular to an upwards spinning flat plate free liquid level coaxial electrostatic spinning method and device. The method includes the steps that shell spinning liquid is filled into a liquid storage tank, core spinning liquid is filled into core needles, and the two kinds of liquid combines at the tips of the core needles to form composite liquid drops, and the composite liquid drops are stretched and solidified on a receiving pole plate under the effect of high voltage electric fields to form ultrathin fiber felt of a core-shell structure. The method has the advantages that the effective coverage effect of the shell spinning liquid and the thickness of a shell can be adjusted according to the concentration and the viscosity of the shell spinning liquid, and therefore the requirement for preparing composite fibers of the specific core-shell structure is met. The upwards spinning flat plate free liquid level coaxial electrostatic spinning device is composed of the liquid storage tank, the core needles, a flat plate electrode, the receiving pole plate and a high voltage electrostatic generator and has the advantages that the device is easy to manufacture, the formed electric fields are uniform, and the multifunctional composite fibers of the more uniform structure can be massively prepared by increasing the number of the core needles and changing core liquid.

The invention discloses a cooling control method for a mold core needle of a die casting mold. The method comprises the following specific steps of: firstly introducing cooling water with pressure of 1 MPa and then introducing compressed air with pressure of 0.6 MPa for cooling and air-drying the mold core needle of the die casting mold. The invention also discloses a device for implementing the method. Compared with the prior art, the device has a simple structure and is convenient to use, and a user can set the temperature of the cooling water according to process requirements so as to maintain the temperature of the mold core needle in a certain range constantly, and therefore the product quality is improved and casting defects are reduced.

The invention provides an RS485 bus system which comprises a power supplier circuit and a power taker circuit, and the power supplier circuit and the power taker circuit are connected with each other. The power supplier circuit comprises a double-core needle base CN2 which is connected with wired controller cables, one end of the double-core needle base CN2 is connected with a grounding port, and the other end of the double-core needle base CN2 is communicated with a power supply port. The power supplier circuit further comprises a control end which is connected with an input/output (IO) of a microprogrammed control unit (MCU). The power taker circuit comprises a double-core needle base CN1 which is connected with mainboard cables, two pins of the double-core needle base CN1 are connected with a rectifier bridge in a crossed mode and are connected with an energy storage capacitor and a power supply chip, the double-core needle base CN2 of the power supplier circuit and the double-core needle base CN1 of the power taker circuit are respectively connected with a communication circuit. The invention further provides a bus system control method which uses the RS485 bus system. The bus system control method includes the following steps: controlling an input level value of the MCU, controlling the power taker circuit to communicate or not, and enabling the energy storage capacitor to take power or discharge power. The RS485 bus system and the bus system control method aim at a small-sized terminal device which is smaller in power, double core wires are adopted to achieve the functions of supplying power and communicating, half cable cost is reduced, and engineering installation difficulty and failure rate are greatly reduced.

The invention relates to a flat plate pinhole coaxial electrostatic spinning fiber composite spinning jet and a spinning method thereof. The spinning method comprises the steps that (1) a flat plate conductive electrode, an auxiliary spinneret plate and a core needle are configured into a coaxial fiber composite spinning jet, wherein a through hole is formed in the auxiliary spinneret plate, and a groove is formed at the silk outlet surface of the through hole, and thus the advantages that a uniform electric field is formed between the flat plate conductive electrode and a receiving plate, so the formation and the batch production of coaxial fibers are facilitated are realized; (2) being respectively injected into a core layer and a shell layer, spinning liquid are converged in the through hole and the groove to form composite liquid drops; the voltage and the spinning distance are properly adjusted, and the composite liquid drops reach the receiving plate after being high-frequency drawn, bent and swung under electric field force and is cured to form core-shell structured ultrathin electrostatic spinning fibers. The flat plate pinhole coaxial electrostatic spinning fiber composite spinning jet and the spinning method thereof have the advantages that the coaxial composite needle is simple to prepare, the preparation of coaxial fiber composite needles in batch is facilitated, and multifunctional composite fibers meeting the demands of various aspects can be prepared by replacing needle cores.

Provided is a non-coring needle for venous access implantatable port. In one embodiment the non-coring needle comprises a puncturing assembly comprising two wings having a central sleeve, an L-shaped needle coupled to the sleeve, the needle including an annular groove or enlargement on its bent portion, and a plastic tubing coupled to the sleeve; and a syringe barrel comprising an internal chamber having a forward opening, and an elongate slot formed on the syringe barrel and being in communication with the chamber. The groove or enlargement is located at a first dent of the slot when the needle is concealed in the chamber in a non-use position, the groove or enlargement is located at a forward second dent of the slot when the needle is fully extended from the opening for use, and the groove or enlargement is permanently locked at a rear triangular recess of the slot when the needle is fully retracted into the chamber.

The invention relates to a combination machine forming by automatic assembly and injection molding of RCA connectors, which comprises a base. A rotating disk is arranged on the base and connected with a screwing mechanism, and clamping moulds are sequentially arranged in all radial directions of the rotating disk. A needle feeding mechanism for enabling copper cored needles to be installed on theclamping moulds, a shell feeding mechanism for enabling copper shells to be installed on the clamping moulds, a positioning mechanism for positioning the copper shells, an injection molding mechanismfor enabling the copper cored needles and the copper shells on the clamping moulds to be made into connectors in injection molding mode, a discharging mechanism for discharging the connectors and a controller for coordinating operation of each parts are respectively arranged on the periphery of the rotating disk. The combination machine can perform assembly and integral injection molding of the RCA connectors full-automatically, is reasonable in control of the whole process, greatly improves working efficiency and reduces cost of various aspects including staff and the like.

The invention discloses a die casting die extruding pin special structure. The die casting die extruding pin special structure comprises a fixed die sleeve plate and a fixed die insert connected withthe fixed die sleeve plate in a matched mode. The fixed die sleeve plate is internally provided with a first hollow structure and a second hollow structure. The first hollow structure is internally provided with an extruding oil cylinder. The second hollow structure is internally provided with a connecting plate. An extruding pin is arranged on the connecting plate. A T-shaped hollow cavity is formed in the extruding pin. A core needle is detachably arranged in the T-shaped hollow cavity. An extruding pin needle sleeve is detachably arranged between the extruding pin and the fixed die insert.According to the die casting die extruding pin special structure, the extruding oil cylinder is used for pushing the extruding pin to move and combined with the extruding pin needle sleeve and the core needle for extruding the outside and/or inside of a die casting while precasting a needle hole so that outside and/or inside shrinkage cavity and porosity defects can be eliminated, meanwhile, the effect that the position of the core needle is not deviated in the operation process can be ensured, and the effect that the size of the core needle hole is stable and unchanged is ensured.

The invention relates to a secondary ejecting mechanism of an improved type invertedly-buckled bottle cap plastic injection mold, which comprises a fixed mold and a movable mold, wherein an ejector sleeve needle ejecting plate and an ejector sleeve core needle ejecting plate are arranged between the fixed mold and a fixed mold plate; an ejector sleeve is installed on the ejector sleeve needle ejecting plate; an ejector sleeve core is installed on the ejector sleeve core needle ejecting plate; the ejector sleeve core is positioned in the ejector sleeve; the ejector sleeve needle ejecting plateand the ejector sleeve core needle ejecting plate are driven by a hook mechanism; the hook mechanism comprises a first sliding block, a second sliding block, a guide frame which is fixed on the fixedmold plate and a hook which is positioned in the guide frame; the other end of the hook is fixed on the movable mold; a first sliding guide groove and a second sliding guide groove are arranged on the guide frame; the lower walls of the two sliding guide grooves are both slopes; springs are both arranged between the two sliding blocks and the needle ejecting plates; a first convex block and a second convex block are arranged on the hook; the first convex block drives the first sliding block and is matched with the first sliding guide groove; the second convex block drives the second sliding block and is matched with the second sliding guide groove; and the thickness of the second convex block is larger than the thickness of the first convex block.

The invention provides an automatic thread nail beating device. The automatic thread nail beating device comprises a lead pipe for being penetrated by a sewing thread, a control valve, an automatic thread feeding pipe, an air cavity, a fixing piece and a core needle main body; the control valve is mounted on the pipe wall of the lead pipe, and the lower end of the lead pipe is connected with the top of the air cavity; one end of the automatic thread feeding pipe is used for connecting an air supply system, and the other end of the automatic thread feeding pipe is connected with the top of the air cavity; the air cavity is hollow, the bottom end of the air cavity is tapered, and the lower-end tapered port of the air cavity is connected with the tail end of a pipeline of the core needle main body; the pipeline for being penetrated by the sewing thread is arranged inside the core needle main body, and the other end of the core needle main body which is not connected with the air cavity is taken as a needle tip; the fixing piece is connected with the air cavity and/or the core needle main body. The automatic thread nail beating device disclosed by the invention can improve the thread nail beating efficiency and greatly improve the operability of a worker for beating thread nails.

The invention discloses a pulled core oblique roof structure. The pulled core oblique roof structure comprises a rear mold top plate and a pulled core sliding base which are arranged on the outer sideof a rear mold, a pulled core base arranged inside the rear mold, a pulled core needle plate and a guide block. The pulled core sliding base is fixedly installed on the rear mold top plate. The rearmold top plate is connected with the rear mold through a drag hook. The rear mold is connected with a front mold through the drag hook. The guide block is fixedly installed inside the rear mold. The side wall of the pulled core base is in sliding fit with the guide block. One end of the pulled core base is slidingly connected with the pulled core sliding base. The pulled core needle plate is located on the inner side of the pulled core base and fixed to the rear mold. Multiple pulled core oblique roof sets are arranged on the pulled core needle plate. Each pulled core oblique roof set comprises an oblique roof guide sliding block and one or more pulled core oblique roofs. One end of each pulled core oblique roof is in movable connection with the pulled core needle plate. Each oblique roofguide sliding block is fixedly connected with the pulled core base. A pulled core oblique roof in the same set is driven to move by the corresponding oblique roof guide sliding block. The invention further discloses an injection mold. According to the pulled core oblique roof structure and the injection mold, the structural design is ingenious; the fabricating cost is lowered; the mold opening time is reduced; production efficiency is improved; and the rate of finished products is high.

Methods for diagnosing or detecting cancerous prostate tissue. A panel of 8 specific marker genes are provided. The overexpression of some of these marker genes compared to their expression in normal prostate tissue and the underexpression of the rest of these marker genes are indicative of cancerous prostate tissue. By using these 8 marker genes as a diagnostic tool, smaller tissue samples, such as those obtained by core needle biopsies can be used.

The invention discloses a WIFI module test tool having high reliability and a working method thereof. The WIFI module test tool includes a module mounting seat arranged above a table surface; four power supply needles for proving power for a WIFI module and distributed longitudinally, and a metallic needle for connecting an outer conductor of a radio frequency cable are fixed on the table surface;a gap is formed in an edge of the module mounting seat; a front end of a radio-frequency head high frequency probe stretches into the gap; the metallic needle longitudinally passes through an inner corner of the gap; a limiting groove for holding and limiting the WIFI module is formed in the module mounting seat; when the WIFI module is pressed downward, all the power supply contact points contact the corresponding power supply needles, the metallic needle passes through a semicircular gap of a first signal contact point, and a core needle is aligned with a concave arc surface of a semicircular gap as a second signal contact point on an edge of the WIFI module horizontally; the radio-frequency head high frequency probe is controlled to move forward horizontally so as to allow the core needle to electrically contact the second signal contact point, and the metallic needle tightly attaches onto the first signal contact point.

The invention relates to the technical field of clinical medical treatment, and discloses a tissue biopsy needle. The tissue biopsy needle comprises a power mechanism, an outer sleeve needle and an inner core needle, wherein the inner core needle is embedded in the outer sleeve needle, a groove is formed in the side wall of the tail end of the outer sleeve needle, a semi-ring cutter correspondingto the groove is arranged on the inner core needle, and the power mechanism drives the semi-ring cutter to transversely rotate in the outer sleeve needle through a needle rod. The tissue biopsy needlehas the beneficial effects that in the process that a cutter opening of the inner core needle and a side cutter act together to cut tissue, the power mechanism drives the semi-ring cutter to rotate rapidly through the needle rod, rapid rotary cutting of the tissue to be detected is achieved to form a complete cylindrical sample, and the tissue is convenient to detect. In the cutting process, dueto the fact that rotary cutting is adopted, the outer sleeve needle and a needle tip are static, shaking cannot occur, damage to surrounding important organs is avoided, safety is greatly improved, and biopsy can be conveniently carried out on tissue such as large vascular gaps, dangerous organ sides, small nodules and lymph nodes.

The invention discloses a hydraulic extruding machine for a ceramic roller billet tube. The hydraulic extruding machine is used for extrusion molding of the ceramic roller billet tube. The hydraulic extruding machine comprises an oil cylinder, a vacuum box, a charging barrel first supporting seat, and a charging barrel second supporting seat, wherein the oil cylinder is provided with an oil cylinder pressure head; the oil cylinder, the vacuum box, the charging barrel first supporting seat and the charging barrel second supporting seat are installed on a machine frame; a charging barrel is fixed between the charging barrel first supporting seat and the charging barrel second supporting seat; the oil cylinder pressure head is placed in the charging barrel; a cone-shaped pipe and a middle core needle bed are installed on the charging barrel second supporting seat; a pipe outlet nozzle is arranged on the cone-shaped pipe; a middle core needle is arranged on the middle core needle bed; and a pipe core is inserted on the middle core needle in a sleeved mode. According to the hydraulic extruding machine, the equipment structure is simple, replacement of the charging barrel and spare parts is easy, the pipe squeezing speed is flexible and adjustable, extruding force is large, a ceramic roller with a large specification can be produced, the extruded billet tube is high in density, not prone to deformation, and large in strength, and the hydraulic extruding machine is capable of meeting technical requirements of the ceramic roller produced in a cold static pressure method.

The invention provides a split-type variable-diameter microwave needle, which includes a puncture needle core, and a tapered tapered head is provided on the rear outer ring of the head end of the puncture needle core, and the tapered tapered head includes a tapered tapered head end and a The tail end of the variable diameter taper head, the diameter from the head end of the variable diameter taper head to the tail end of the variable diameter taper head increases gradually, and a sleeve is arranged inside the tail end of the puncture needle core. During the operation, the split-type variable-diameter microwave needle can directly puncture the patient's skin and enter the lesion position; the bleeding and postoperative healing time are reduced, which is beneficial to the postoperative recovery of the patient.

An end cutting biopsy gun comprises an outer sleeve assembly, a cutting tube assembly, an inner core needle and a handle assembly, the outer sleeve assembly comprises an outer sleeve and an outer sleeve fixing piece, the cutting tube assembly comprises a cutting tube and a cutting tube fixing piece, the inner core needle is fixedly installed on the handle assembly, and an upper shell and a lower shell form a handle inner cavity; a first step is arranged in the inner cavity of the handle, a sliding groove for the cutting pipe fixing piece to drive the outer sleeve fixing piece to move front and back is formed in the inner cavity of the handle, and a push handle is arranged on the outer side of the inner cavity of the handle. Compared with the prior art, the cutting space is the cylindrical cutting groove, the amount of tissue taken out at a time is equal to more than two times that of a traditional semicircular cutting groove, the taken-out amount is thicker, and the accuracy of case analysis is guaranteed; in addition, the sampling length of the cylindrical cutting groove can be achieved by adjusting the gear piece, a doctor can adjust the sampling amount of the tissue according to requirements, and therefore quantitative sampling is achieved. One-key shooting is realized, and the operation is simple.

The invention discloses an injection device of marrow cavity in the shape of pistol, comprising a handle, a switch, a driving device, a connector of rotary head, a special rotary head of sleeve needle and a power source. Wherein, the power source, the switch and the driving device are connected in series while the driving device is the main part of said pistol-shaped injection device whose head is the connector of converter which is the external working part of said pistol-shaped injection device; the inner part of pistol-shaped injection device is connected to the driving device while its outer part is connected to the special rotary head of sleeve which is comprised by a injection needle whose tip is in the structure of double inclined blade and the inner core needle whose tip is in the structure of cone. The invention has the advantages of small volume, using the battery as power, carrying portably, safe and reliable usage, reduced time and improved rescue success ratio.