45 results about "Screw extractor" patented technology

A tool for gripping and removing mechanical fasteners such as pedicle screws. With reference to FIG. 7, the device generally resembles a screwdriver, having a handle on one end, a long shaft in the middle, and fastener engaging means on the other end. The fastener engaging means comprises a set of two or more jaws having inward facing gripping surfaces positioned to grasp the external surfaces of a screw head. The jaws are formed as part of a collet slidably mounted within an outer thread sleeve. The thread sleeve is attached to the shaft. A tapered journal on the collet interacts with a tapered bore in the thread sleeve so that when the collet is pulled into the thread sleeve, the set of two or more jaws are squeezed together. The threaded engagements between the collet and the thread sleeve should be the reverse of the thread on the screw to be removed; i.e., if a right-hand screw is to be removed then the threaded engagement between the collet and the thread sleeve should be made with a left-hand thread. In operation, the jaws are placed over the screw head and the device is rotated in a counterclockwise direction (for removal of a screw with a right-hand thread). The inward facing surfaces on the jaws bear against the bolt head, thereby impeding the rotation of the collet relative to the thread sleeve. The left-hand threaded engagement between the collet and the thread sleeve therefore pulls the collet further into the thread sleeve, whereupon the tapered bore squeezes the jaws more tightly together. Thus, the reader will appreciate, applying torque to the device when it is in position on a screw head simultaneously torques the screw head and squeezes the jaws more tightly together. The inward facing surfaces are also provided with an undercut in order to accommodate axial misalignment between the jaws and the screw head.

The invention discloses a screw extractor for an orthopedic surgery. The screw extractor comprises a screw extracting tube, holding tubes, a dilator, holding clamps, conical teeth, tooth clamp convex sections, arc-shaped chucks, a driver bar and a dilating ball joint, wherein the dilator is arranged in the screw extracting tube through limit threads in a screwing manner; the holding tubes are arranged at the outer part of the screw extracting tube through fastening threads; handles are arranged at the outer sides of the upper end of the screw extracting tube, and the limit threads are arranged at the inner side of the upper end of the screw extracting tube; a plurality of holding clamps and holding clamp grooves are arranged at and formed in the lower end of the screw extracting tube; the arc-shaped chucks and the conical teeth are arranged at the lower ends of the corresponding holding clamps; one tooth clamp convex section is arranged at the inner side of each holding clamp; the driver bar is arranged at the lower end of the dilator; the dilating ball joint is arranged in the middle of the dilator; the dilating ball joint is moved by the dilator through the limit threads; the dilating ball joint pushes away the tooth clamp convex sections and drives the holding clamps to dilate; a bone screw cap is clamped and fixed by the plurality of arc-shaped chucks. According to the screw extractor disclosed by the invention, the screw cap is fixed by the arc-shaped chucks and the conical teeth; screws can be quickly and conveniently taken out and are prevented from sliding out of the groove, so that pains of a patient are relieved, and the efficiency of the surgery is improved.

A countercurrent-type continuous dual-screw extractor is composed of feeder, inclined extracting cabin, dregs discharger, filter, condenser, juice squeezer and power drive mechanism. It features that parallel two spiral axles, which consists of multiple segments and has continuous perforated spiral blade or discontinuous paddles, are rotating in different directions.

An apparatus and method to remove uranium from a body of material wherein the method includes the steps of depositing the body of solid material in an ultrasonic extractor and depositing an amount of acid in the ultrasonic extractor. The method also provides for the steps of heating a jacket of the ultrasonic extractor, transporting the body of solid material in the ultrasonic extractor and the amount of acid such that the body of solid material and the acid contact each other inside the heated ultrasonic extractor while the ultrasonic extractor provides ultrasonic energy to both the body of solid material and the amount of acid, wherein the amount of acid strips uranium from the body of solid material. The method further provides for collecting the amount of acid and the body of solid material in the ultrasonic extractor in different positions, transporting the amount of acid with the stripped uranium to an extraction mixer settler, and settling uranium product from the extraction mixer settler.

The invention discloses a screw for a juice extractor. The screw comprises a screw body. The screw body comprises thread lines, an inner ring, a rotating shaft and a space, the thread lines are positioned on the surface of the screw body, the inner ring which is downwardly protruded is positioned at the lower end of the screw body, the rotating shaft is arranged on the lower end surface of the screw body and is positioned in the inner ring, and the space is positioned in a lower opening formed in a position between the inner ring and the rotating shaft. The screw is characterized in that protrusions are arranged among the thread lines. The screw with the structure has the advantages that raw materials can be cut or pulled by the protrusions, so that effects of cutting the raw materials and pulling the raw materials to move downwardly can be realized, and effects of preventing blocking and preventing a motor from being burned out can be realized.

The invention discloses a vertical screw extruding juice extractor, which comprises a machine base, a motor arranged in the machine base, an extrusion screw, a pressing chamber cooperating with the extrusion screw to extrude materials, and an upper cover installed above the pressing chamber , the pressing chamber is installed on the machine base, the extruding screw is installed in the pressing chamber, the upper cover is provided with an accommodating part protruding upwards and used to accommodate the upper part of the extruding screw, and the side wall of the accommodating part is set There is a feed port and a feed channel connected to the feed port, the angle between the geometric center of the two ports of the feed channel and the vertical plane is a, 30°≤a≤60°, so that the material depends on itself The gravity can quickly enter the accommodating part directly through the feeding channel, and is quickly brought into the extrusion grinding part of the extrusion screw and the pressing chamber formed by the downward guidance of the material propulsion part at the corresponding position of the feeding port. Squeeze in the juice gap, easy to realize fast automatic feeding.

A ring saw broken nail remover, which is composed of a connecting seat, a handle, a clamping handle, a ring saw, a tapered notch, a connecting shaft, a T-shaped through groove, a clamping jaw, a T-shaped thread, etc., the upper part of the connecting seat is connected with the The clamping handle is connected, the left and right sides are connected with the handle, and the lower part is connected with the ring saw. The connecting shaft passes through the connecting seat from the middle and is connected with the jaws. The tapered groove There is a T-shaped thread groove on the mouth, which is used to cooperate with the T-shaped thread on the jaw. Since the thread is arranged in a tapered shape, it can also move radially when the jaw moves up and down, so that The clamping and loosening actions of the jaws are completed. The invention only needs to carry out very shallow drilling to take out the broken nail, and the operation does not need to repeatedly adjust the direction and position, and the operation is simple.

The invention relates to a screw extractor, in particular to a high frequency induction heating screw extractor. The invention solves the problem that the existing screw extractor is hard to disassemble some shaft fastening pieces with tight fit. The high frequency induction heating screw extractor comprises a mandrel and a falcula connected with the mandrel and also comprises a group of high frequency induction heaters, wherein a magnet is arranged on one end of each high frequency induction heater. Compared with the traditional screw extractor, the heating device is added on the high frequency induction heating screw extractor of the invention; and the gaps between the parts to be disassembled can be increased by heating so as to greatly reduce the friction force between the parts to be disassembled, largely increase the drawing ability of the screw extractor and protect the parts to be disassembled and the personal safety of the site operation personnel.

An orthopedic screw extractor device including a shaft, an end portion about a first end of the shaft for securing to a handle, and a screw extracting tip about a second end of the shaft opposite the first end. The screw extracting tip further includes a generally frustoconical shape having a side at an angle of about 5 to 15 degrees relative to a longitudinal axis of the screw extracting tip. The screw extracting tip further includes first, second and third screw threads and first, second and third flutes circumferentially spaced about the screw extracting tip and extending across an entire length of the screw extracting tip. Each of the screw threads has a lead of about 0.07 to 0.12 inches, a pitch of about 0.02 to 0.04 inches, a thread angle of about 40 to 50 degrees, and a depth of about 0.01 to 0.02 inches.

The invention discloses a screw extractor which comprises a big head and a handle, wherein the handle is arranged at the rear end and connected with the big head into a whole, and the big head is conical and is provided with a cutting edge. The screw extractor disclosed by the invention has the advantages of providing a tool which is specially used for taking screws, especially broken screws which are difficult to remove inside objects, being simple in structure, capable of taking the screws out under the driving of forceful pulling just through wedging the cone at the front end into the screw so as to connect the cone and the screw into a whole, being practical and effective and convenient to use and providing convenience for production and daily use.

The invention discloses a broken screw extractor, which relates to a manual tool which can be used for extracting a broken screw easily. The technical problem to be solved is to provide a broken screw extractor for extracting a broken screw without damaging screw threads. The broken screw extractor comprises a body and teeth, wherein the body gradually becomes thick from bottom to top; any cross section of the body is regularly polygonal; the edge of the body is provided the projecting teeth; the teeth are in the same direction; the upper part of the large head end of the body is provided with a hole; the end part of the large head end of the body is provided with a handle; and the handle has a rectangular or cylindrical structure of which the two faces are milled into planes. The broken screw extractor is convenient to use, is easy to operate, is suitable for any broken screw, and is prevented from damaging the screw thread.

The invention relates to an inner fixing screw extractor in the orthopedics department. In order to solve the problem that inner fixing screw is difficult to extract in the orthopedics department, tool steel is manufactured into an outer hexagonal prism or hexagram spanner cylinder composed of a left pedal and a right pedal, the upper portion and the lower portion of the cylinder are equal in thickness, or the portion above the lower end is thickened, the upper end of the cylinder is buckled by an upper end cap, or the upper end cap is hinged to the upper end of the cylinder; a sideway stretching handle for rotationally applying force is fixedly installed at the lower portion of the right pedal of the outer hexagonal prism or hexagram spanner cylinder, and a spring for outwards extruding the left pedal of the lower end of the outer hexagonal prism or hexagram spanner cylinder to face the inner end face is installed on the rear inner end face of the lower end of the right pedal of the spanner cylinder in the clockwise direction. Convex teeth obliquely stretching in the anticlockwise direction are manufactured on the periphery of the lower end of the outer hexagonal prism or hexagram spanner cylinder composed of the left pedal and the right pedal. The inner fixing screw extractor has the advantages of being capable of remarkably increasing occlusal force, simple, easy to use, high in anti-slipping performance, low in cost, high in safety, not prone to thread slipping and particularly suitable for extracting a slipping screw, and metal debris and heat are not generated.

The invention discloses a broken screw extractor for orthopedics department clinic. The broken screw extractor comprises a fixed cylinder with an open bottom end, the top of the inner wall of the fixed cylinder is rotationally connected with an outer threaded cylinder with the two ends open through bearings, connecting rods are hinged to the left side and the right side of a moving block through hinge seats, through grooves are formed in the tops, close to the left side and the right side, of the fixed cylinder, the top of a fixing disc is rotationally connected with a screw rod through a bearing, the surface, close to the bottom end, of the screw rod is in threaded connection with a moving part, and the opposite sides of the two clamping parts are in sliding connection with the opposite sides of two moving plates through sliding parts. Through cooperation of the structures, the broken screw extractor solves the problems that in the broken screw extracting process, the broken screw extractor is not ideal in broken screw clamping and fixing effect, broken screws are prone to disengagement in the pulling-out process, after the broken screw is clamped and fixed, the broken screw is pulled out in an upward lifting mode through a handle, labor is wasted, and the pulling-out efficiency is low.

The invention discloses a high-strength screw extractor. The high-strength screw extractor comprises a large head and a handle which is integrally connected with the rear end of the high-strength screw extractor, cutting edges are formed on the large head, and threads are formed on the surface of the large head. The high-strength screw extractor has the advantages that the threads are formed on the large head portion where the screw extractor acts on a screw so that more fastness are achieved when the high-strength screw extractor is connected with the screw, the connecting strength of the screw extractor is improved, meanwhile the acting force during striking can be reduced, the damage to the high-strength screw extractor can be reduced, the service life is prolonged, and more convenience and reliability during usage can be obtained.

The invention relates to a screw extractor, and belongs to the technical field of mechanical assembly. The screw extractor comprises a screw extractor body. The top of the screw extractor body is connected with an extension rod through a connector. A square clamping block is arranged on the top of the extension rod. The top of the square clamping block is connected with a connecting handle. The connecting handle is provided with a clamping opening corresponding to the square clamping block. A screw extraction vessel is arranged on one side of an inner cavity of the connecting handle. One side of the screw extraction vessel is connected with a vessel cover through a movable rotating shaft. A handle is further arranged on one side of the vessel cover. A reverse thread is further arranged on the screw extractor body. A drill bit is arranged at the bottom of the screw extractor body. A detached screw or a screw needing to be installed can be stored through the screw extraction vessel. When the screw is needed or placed, the vessel cover can be pulled open directly through the handle. Meanwhile, a detachable structure is adopted in the connecting handle and the square clamping block, corresponding screw extractors can be conveniently selected for screws of different types, replacing is convenient, the structure is simple, and practicability is high.

The invention relates to an end breaking screw extractor which comprises a clamping rack, a retaining clamping mould, a movable clamping mould, a fixed bar, a movable bar and a screw-threaded bar. Compared with the prior art, the invention keeps the threaded hole dimension on one hand, and realizes easiness in use and simplicity of operation on the other hand.

The invention discloses a screw loose screw extractor. The screw loose screw extractor comprises a supporting frame and is characterized in that guide slots are symmetrically formed in the two sides of the supporting frame, wherein a through hole is formed in the upper part of the supporting frame; a pair of screw extracting pliers are arranged in the through hole; and a clamping mechanism which can guide, rotate and clamp the pair of screw extracting pliers, is movably arranged in the guide slots and is used for clamping the screw extracting pliers and orientating the rotation of the screw extracting pliers. The screw loose screw extractor is convenient for the labor-saving extraction of screws and is simple in structure and convenient to use.