776 results about "Outer coil" patented technology

A dynamic fixation medical implant includes a longitudinal connecting member assembly having an elongate coil-like outer member and an inner cylindrical core attached to the outer member at only one end thereof. Some assemblies include a second longitudinal connecting member in the form of a rod that is fixed to the inner core and extends outwardly from the assembly. Certain assemblies include a threaded core or threaded inserts that cooperate with a helical slit of the coil-like outer member. Two or more cooperating bone screw assemblies attach to the connecting member assembly. The bone screw assemblies may include upper and lower compression members for affixing to and cradling the coil-like outer member only, allowing relative movement between the outer member and the inner cylindrical core. Press fit or snap-on features attach one end of the coil-like outer member to one end of the inner cylindrical core.

A wireless charger charges a storage battery of a portable electronic device in a wireless manner (non-contacting or contact-less) so that a variation of charging efficiency is not serious though the storage battery is placed any position of the wireless charger. The wireless charger is provided with a primary coil for generating a magnetic field so as to charge a subject, which is provided with a secondary coil, by means of inductive coupling with the secondary coil. The primary coil includes an outer coil arranged with a predetermined winding number and a predetermined size; and at least one inner coil arranged to be included inside the outer coil. The outer coil and the inner coil are arranged so that, when a primary current is applied to the outer coil and the inner coil, magnetic fluxes generated in the outer coil and the inner coil are formed in the same direction.

A device for removing obstructions from vessels or small openings in the body, comprising a rotatable ablator tip which is guided to the obstruction in a reduced diameter configuration, expanded and rotated to remove the obstruction, and contracted to remove the device from the body. The variably expandable abrasive tip coil in one embodiment of the invention is actuated by a piston means disposed within the coil. A pair of collars is attached to the ends of the coil, and the piston effects relative longitudinal axial movement of the collars and, hence, the respective ends of the coil tip. When the ends of the coil tip are so moved with respect to one another, expansion and contraction of the diameter of the coil tip results. In another embodiment of the invention, the expansion tip coil is actuated by an expandable and contractible bellows means disposed within the coil, instead of the piston means. In another embodiment of the invention, the expansion and contraction of the coil tip are effected by longitudinal axial movement of an internal coil attached to one end of the coil tip, within an outer coil attached to the other end of the coil tip. In another embodiment of the invention, expansion and contraction of the coil tip are effected by an inflatable balloon disposed within the coil tip. The balloon expansion means enlarges preferably at the central portion of the coil to make a bulge. +RR The questions raised in reexamination request No. 90 / 003,360, filed Mar. 15, 1994, and 90 / 003,723 filed Feb. 14, 1995, have been considered and the results thereof are reflected in this reissue patent which constitutes the reexamination certificate required by 35 U.S.C. 307 as provided in 37 CFR 1.570(e).

A steerable guide wire includes a core wire having a proximal end and a distal end. A braided filament is affixed to the distal end of the core wire. An outer coil surrounds at least a portion of the core wire and the braided filament. A proximal end of the braided filament is secured to a distal end of the coil. By locating the braided filament in the distal tip portion of the guide wire, a guide wire is provided that is highly flexible, has a high degree of tensile integrity, and is highly steerable, even in tortuous vasculature. Filter and balloon catheters having braided filaments at the distal end are also described.

Method and apparatus for drilling a directional or horizontal wellbore in a hydrocarbon formation using concentric coiled tubing drill string having an inner coiled tubing string and an outer coiled tubing string defining an annulus there between. A bottomhole assembly comprising a directional drilling means is provided at the lower end of the concentric coiled tubing drill string for reverse circulation drilling. Directional drilling means comprises a reciprocating air hammer and a drill bit, a positive displacement motor and a reverse circulating drill bit, or a reverse circulating mud motor and a rotary drill bit, and a bent sub or housing. Drilling medium is delivered through the annulus or inner coiled tubing string for operating the directional drilling means to form the directional or horizontal wellbore. Exhaust drilling medium comprising drilling medium, drilling cuttings and hydrocarbons are removed from the wellbore by extraction through the other of the annulus or inner coiled tubing string.

The invention relates to a water-repellent anti-contamination hygroscopic perspiratory composite tissue knitted fabric produced in knitting industry and a production method thereof. An outer coil of the knitted fabric is made of yarn treated by water-repellent anti-contamination technology; a coil at a middle connection layer is made of natural fiber yarn with good hygroscopic and water absorbent performance; an inner coil is made of hygroscopic fiber yarn, and the hygroscopic fiber yarn is treated by hydrophilicity, has a microcellular structure and is in a deformed cross section; the fabric tissue is double-rib double-layer composite tissue, and is knitted on a 2+2 needle track double-surface circular knitting machine; and the knitted fabric is subjected to preforming, degreasing and cleaning, softening, dewatering, expanding, drying, forming and the like. The outer layer of the provided knitted fabric has excellent water-repellent anti-contamination function, and the inner layer has excellent hygroscopic perspiratory function; the knitted fabric has soft hand feel, good permeability and elasticity and antistatic performance, and is widely applied to sportswear, summer clothing, work clothes of hotels and oil field, regimentals and the like; three-tissue structure of the knitted fabric is formed by one-step knitting so that the production technology has easiness in control and the product quality is reliable.

The present invention concerns an apparatus (1′) for NMR spectroscopy and / or NMR imaging of a sample. The apparatus comprises a static probe comprising an outer coil for excitation of nuclei of the sample by generating an incident radio frequency field at the Larmor frequency of the nuclei, and for reception of a return radio frequency field emitted by the sample, and a sensitive inner coil (6a′) which is mounted closely around or in contact with the sample container and which is wirelessly coupled to the outer coil by an electromagnetic radio frequency field. The sensitive inner coil is embedded in an inner spinning rotor (2) which is rotatively mounted inside the static probe and which is integral with the sample container, so that the filling factor and the radio frequency field amplitude in the sensitive coil are maximized.

Described herein are shaped coil TMS electromagnets formed by two bent magnetic coil loops joined at a vertex having an angle between the outer coil regions of the coils that is typically less than 120 degrees (e.g., between about 45 and about 70 degrees, 60 degrees, etc.). The vertex region shaped to optimize the magnetic field projected from the TMS electromagnet. For example, the vertex region may be horizontal or vertical. In some variations the vertex region is formed by re-arranging the conductive windings forming the two coils so that they are no longer arranged in the same columnar structure that they are in the other portions of the bent magnetic coil loops. These TMS electromagnets may be well suited for use in deep-brain Transcranial Magnetic Stimulation.

A guidewire for use in ear, nose and throat procedures may include an elongate core wire having a proximal region and a distal region. The distal region of the core wire may include a flattened portion adapted to provide preferential flexure along at least one axis of the wire. The distal region of the core wire may include a tip portion distal of the flattened portion, where at least one cross-sectional dimension of the tip portion is greater than at least one cross-sectional dimension of the flattened portion. The guidewire may include an outer coil disposed around at least a portion of the elongate core wire. The guidewire may also include an atraumatic tip coupled to the core wire or the outer coil.

A low-insertion force electrical connector for implantable medical devices. The electrical contact includes a housing with a pair of opposing sidewalls each with center openings oriented generally concentrically around a center axis. The housing also includes a recess with a recess diameter. An inner coil is located in the recess with a coil axis generally co-linear with the center axis of the center openings. The inner coil includes an outer diameter less than the recess diameter, and an inner diameter greater than a center opening diameter. An outer coil is threaded onto the inner coil to form a generally toroidal-shape. The outer coil has an outer diameter less than the recess diameter, and an inner diameter less than the center opening diameter. The outer coil is radially expanded within the recess in response to engagement with contact rings on the implantable medical device, such that the outer diameter of the outer coil is at least equal to the recess diameter.

A guidewire for use in ear, nose and throat procedures may include an elongate core wire having a proximal region and a distal region. The distal region of the core wire may include a flattened portion adapted to provide preferential flexure along at least one axis of the wire. The distal region of the core wire may include a tip portion distal of the flattened portion, where at least one cross-sectional dimension of the tip portion is greater than at least one cross-sectional dimension of the flattened portion. The guidewire may include an outer coil disposed around at least a portion of the elongate core wire. The guidewire may also include an atraumatic tip coupled to the core wire or the outer coil.

A high resolution NMR probe having two or more resonators, an inner resonator which is closely coupled to a sample and is used to stimulate and receive a response from one nuclear species, and an outer resonator to induce transitions in another nuclear species, wherein the resonators may be provided with cooling capability and may be made of superconducting material, and wherein the inner resonator may be a saddle coil or a birdcage coil with capability of being tuned, and wherein the outer resonator may be one or more spiral wound saddle coil.

A match circuit includes the following: a power input circuit coupled to an RF source; an inner coil input circuit coupled between the power input circuit and an input terminal of an inner coil, the inner coil input circuit including an inductor and a capacitor coupled in series to the inductor, the inductor connecting to the power input circuit, and the capacitor connecting to the input terminal of the inner coil, a first node being defined between the power input circuit and the inner coil input circuit; an inner coil output circuit coupled between an output terminal of the inner coil and ground, the inner coil output circuit defining a direct pass-through connection to ground; an outer coil input circuit coupled between the first node and an input terminal of an outer coil; and an outer coil output circuit coupled between an output terminal of the outer coil and ground.

The receive coil arrangement includes an inner local volume coil adjacent the part to be imaged so as to maximize the received MR signal and an outer coil, which may be the built in body coil of the magnet, connected by cable to the signal processing system. Both the coils are individually tuned to the common resonant frequency and the local volume coil include an arrangement to halt current flow therein during the transmit stage. The local volume coil has no cable and is arranged to communicate the MR signal therein to the signal processing system through the outer coil by inductive coupling to the outer coil. Despite inherent losses by interfering with the tuning of the loops and in the inductive coupling this magnifies the MR signal and makes the local volume coil wireless.

A coil component includes a first coil block and a second coil block that are sandwiched between magnetic substrates so as to form a chip body, and external electrodes that are attached to the chip body. The first coil block includes a coil body and an insulating body. The coil body includes an outer coil portion and an inner coil portion. The outer coil portion includes a first pattern group and a second pattern group, which are connected helically vertically in an alternating fashion. The inner coil portion includes a first spiral pattern and a second spiral pattern, which are connected to each other in series. In other words, low stray capacitance is achieved by the outer coil portion, while high inductance is achieved by the inner coil portion.

The invention discloses a rail damage detection device and method based on magnetostriction and longitudinal ultrasonic guided wave, which are applied in the field of railway traffic nondestructive detection. The rail damage detection device comprises a shell, wherein an inner wire support, an inner coil, an outer wire support, an outer coil, a yoke and a permanent magnet are arranged in the shell; a current input port, an inner coil current input electric wire and an inner coil current output electric wire are arranged at one end of the shell; an outer coil current output electric wire, an outer coil current loop electric wire and a voltage output port are arranged at the other end of the shell; and the upper part of the shell is fixedly connected with a rail detection vehicle. The rail damage detection method comprises the following steps of: exciting induced electromotive force by utilizing magnetostriction and longitudinal ultrasonic guided wave, and indirectly measuring time and strength generated by a defect reflective waveguide signal according to the induced electromotive force, and further determining the destruction position and the destruction size. The rail damage detection device and method can be used for carrying out accurate detection on trace destruction inside and outside the rail, and have the advantages of long detection distance and high detection efficiency.

A low-insertion force electrical connector for implantable medical devices. The electrical contact includes a housing with a pair of opposing sidewalls each with center openings oriented generally concentrically around a center axis. The housing also includes a recess with a recess diameter. An inner coil is located in the recess with a coil axis generally co-linear with the center axis of the center openings. The inner coil includes an outer diameter less than the recess diameter, and an inner diameter greater than a center opening diameter. An outer coil is threaded onto the inner coil to form a generally toroidal-shape. The outer coil has an outer diameter less than the recess diameter, and an inner diameter less than the center opening diameter. The outer coil is radially expanded within the recess in response to engagement with contact rings on the implantable medical device, such that the outer diameter of the outer coil is at least equal to the recess diameter.

The invention discloses a forging method of automobile aluminum alloy hub through once heating and one mould to manufacture non-flash automobile aluminium alloy hub, which is characterized by the following: the upper die is composed of upper central hammer, inner coil of upper die, middle coil of upper die and outer coil of upper die to be inserted assemblage sequently; the lower die contains lower central hammer, inner coil of lower die, middle coil of lower die and outer coil of lower die; the outer wall of middle coil lip of upper die is extended into the inner wall of the middle coil lip of lower die by 6-8mm when the die is moulding and sealing. The invention replaces the forging technique of aluminium alloy in the manufacturing course to improve mechanic property, automobile quality and safety greatly, which saves the process to cut flash without multiple heating and moulds, therefore reducing cost obviously.

An inductively coupled plasma process can effectively and properly control plasma density distribution within donut-shaped plasma in a processing chamber is provided. In an inductively coupled plasma processing apparatus, a RF antenna 54 disposed above a dielectric window 52 is segmented in a diametrical direction into an inner coil 58, an intermediate coil 60, and an outer coil 62 in order to generate inductively coupled plasma. Between a first node NA and a second node NB provided in high frequency transmission lines of the high frequency power supply unit 66, a variable intermediate capacitor 86 and a variable outer capacitor 88 are electrically connected in series to the intermediate coil 60 and the outer coil 62, respectively, and no reactance device is connected to the inner coil 58.

The closed electron drift plasma thruster uses a magnetic circuit to create a magnetic field in a main annular channel for ionization and acceleration, said magnetic circuit comprises: an essentially radial first outer pole piece; a conical second outer pole piece; an essentially radial first inner pole piece; a conical second inner pole piece; a plurality of outer magnetic cores surrounded by outer coils to interconnect the first and second outer pole pieces; an axial magnetic core surrounded by a first inner coil and connected to the first inner pole piece; and a second inner coil placed upstream from the outer coils. The thruster also comprises a plurality of radial arms included in the magnetic circuit, and a structural base which is separate from the magnetic circuit and which serves, amongst other things, to cool the coils.

A device for delivering fluid, having an elongated outer casing (10) provided with a substantially cylindrical inner chamber (11); an inner cartridge (20), for insertion into the inner chamber (11) and including a plunger (21) movable axially along a longitudinal axis A-A of an inner reservoir (22) towards an outlet (28). The device also includes a coil assembly (12, 23, 24) having an outer coil (12), an inner coil (23) and an inner coil core (24). The outer coil (12) is provided on the outer casing (10) and axially oriented along the chamber longitudinal axis. And, the inner coil (23) is provided in the inner cartridge (20) attached to the movable plunger (21).

A uniformity of plasma density in a target object surface and plasma processing characteristics can be improved. A plasma processing apparatus 10 includes: a processing chamber 100 in which a plasma process is performed on a wafer W; a first high frequency power supply 140 configured to output a high frequency power; a high frequency antenna 120 including an outer coil, an inner coil and n (n is an integer equal to or greater than 1) number of intermediate coil(s) that are concentrically wound about a central axis outside the processing chamber 100; and a dielectric window 105 provided at a part of a wall of the processing chamber 100 and configured to introduce electromagnetic field energy generated from the high frequency antenna 120 into the processing chamber 100.

This document discusses, among other things, a stator with transposition between the windings or coils. The coils are free from transposition to increase the fill factor of the stator slots. The transposition at the end connections between an inner coil and an outer coil provide transposition to reduce circulating current loss. The increased fill factor reduces further current losses. Such a stator is used in a dual rotor, permanent magnet machine, for example, in a compressor pump, wind turbine gearbox, wind turbine rotor.

The present invention provides a wireless charger with reduced variation in charging efficiency. The wireless charger charges the storage battery of the portable electronic device in a wireless manner, that is, in a non-contact or non-contact manner, so that no matter where the storage battery is located in the wireless charger, there is no serious change in charging efficiency. The wireless charger has a primary coil for generating a magnetic field to charge an object with the secondary coil through inductive coupling with the secondary coil. The primary coil includes: an outer coil arranged with a predetermined number of windings and a predetermined size; and at least one inner coil arranged to be included within the outer coil. The outer coil and the inner coil are arranged such that when a primary current is applied to the outer coil and the inner coil, magnetic fluxes generated in the outer coil and the inner coil are formed in the same direction.

A high power, high frequency toroidal inductor is broken into four quadrant cores and uses bare rectangular conductors to form coils. One coil is wound centrally around each quadrant. The coils positioned centrally on the quadrants minimize the effect of damaging fringe flux and leakage flux. The coil inner winding ends are bent perpendicular to the coils to form tangential leads with one coil inner tangential lead joined to an adjacent outer coil radial lead by jumpers that span adjacent coils.

A method for winding a crossover-free fiber optic coil sensor comprising: attaching a fiber optic cable to an outer edge of a coil form, wherein the coil form comprises a first side and a second side; forming a first outside-in coil layer on the first side of the coil form using a first winding head; attaching a first inside-out separator on top of the first outside-in coil layer; forming a first inside-out coil layer on top of the first inside-out separator using the first winding head; forming a second outside-in coil on the second side of the coil form using a second winding head; attaching a second inside-out separator on top of the second outside-in coil layer; and forming a second inside-out coil layer on top of the second inside-out separator using the second winding head.

A match circuit includes the following: a power input circuit coupled to an RF source; an inner coil input circuit coupled between the power input circuit and an input terminal of an inner coil, the inner coil input circuit including an inductor and a capacitor coupled in series to the inductor, the inductor connecting to the power input circuit, and the capacitor connecting to the input terminal of the inner coil, a first node being defined between the power input circuit and the inner coil input circuit; an inner coil output circuit coupled between an output terminal of the inner coil and ground, the inner coil output circuit defining a direct pass-through connection to ground; an outer coil input circuit coupled between the first node and an input terminal of an outer coil; and an outer coil output circuit coupled between an output terminal of the outer coil and ground.

The present invention relates to an apparatus and a method for influencing and / or detecting magnetic particles in a field of view (28), in particular for examination of human patients. The apparatus comprises i) selection-and-focus means (120) for generating a magnetic selection-and-focus field (50), wherein said at least one set of selection-and-focus field coils comprises—at least one inner selection-and-focus field coil (113, 115) being formed as a closed loop about an inner coil axis (115a), first inner selection-and-focus field coil (115)—a group of at least two outer selection-and-focus field coils (116-119) arranged at a larger distance from said inner coil axis (115a) than said at least one inner selection-and-focus field coil (113, 115) and at different angular positions, each being formed as a closed loop about an associated outer coil axis (116a-119a), and ii) drive means (120) comprising a drive field signal generator unit (122) and drive field coils (124; 125, 126, 127) for changing the position in space and / or size of the two sub-zones (52, 54) in the field of view (28) by means of a magnetic drive field so that the magnetization of the magnetic material changes locally.