256results about How to "Reduce magnetic force" patented technology

A method and apparatus for ablation of a layer of tissue is achieved by providing first and second bodies on opposed sides of the tissue. The first body includes a first ablation member and a source of magnetic force adjacent one side of the tissue. The second body includes a second ablation member and a magnetically attractive element responsive to the magnetic force adjacent the other side of the tissue. The magnetic attraction between the source and the attractive element is adapted to align the first and second bodies in opposed relationship on the opposed sides of the tissue. One of the first and second bodies may include at least one expandible member for controlling the magnetic attraction between the bodies.

There is provided an apparatus for generating vibrations, the apparatus including: a lower case made of a non-magnetic material; a coil plate mounted on the lower case and made of a magnetic material so as to reduce magnetic force leakage; a coil mounted on the coil plate; and a motion element including a magnet disposed to be opposite to the coil such that an electromagnetic force is generated by interaction with the coil.

A homopolar machine produces an axial counter force on the rotating shaft to compensate for the load on the shaft's thrust bearing to reduce wear and noise and prolong bearing life. The counter force is produced through magnetic interaction between the shaft and the machine's field coils and is created by changing the current excitation of the field coils, which results in a magnetic flux asymmetry in an inner flux return coupled to the shaft. The homopolar machine may also have a configuration that uses current collectors that maintain substantially constant contact pressure in the presence of high magnetic fields to improve current collector performance. The current collectors are flexible and may be made from either electrically conductive fibers or stacked strips such that they bear up against the armature so that the pressure is maintained by the spring constant of the current collector material. The homopolar machine may also have a configuration where the brushes are oriented so that the current is aligned as much as is practical with the local magnetic field lines so as to reduce the lateral electromagnetic forces on the brushes.

A magnetic screw-holding device is assembled close to the profile tip on the shank of a hand-screwdriver or screwdriver-insert with long shank. The device essentially consists of a sleeve made of non magnetic-conducing material in which a magnet is fixed at the front side or of a magnet made of magnetic material embedded in a plastic binder produced by injection molding. The sleeve with the magnet or the magnet can easily move in longitudinal direction and is or can be brought into such a position relative to the profile tip that by the force of the magnet-field the sleeve or the magnet moves automatically into a position in which the front face of the magnet contacts the surface of the screw head and also attracts the screw onto the profile tip so that it completely penetrates into the recess in the screw head if a screw is placed on the profile tip.

A ventricular assistive device (VAD) based on a progressive cavity pump includes a pump housing having an inlet and an outlet, a pump stator contained within the pump housing, a pump rotor rotatably disposed within the pump stator, a motor including a motor rotor contained within the pump housing and a direct drive means connected between the motor rotor and an axial shaft of the pump rotor for rotating the pump rotor. The motor rotates the motor rotor, which in turn rotates the pump rotor through the direct drive means. The rotation of the pump rotor within the pump stator forms a plurality of cavities that carry blood forward through the pump housing from the inlet to the outlet as the motor drives the direct drive means.

A medical instrument for manipulating, in particular retracting tissue or an organ in the human or animal body, comprises an elongated shaft having a distal portion introducible into the body, and at least one working element arranged at a distal end portion of the shaft for manipulating the tissue or organ. The at least one working element comprises at least one magnetically acting element producing a magnetic field for manipulating the tissue or organ. A method for manipulating, in particular retracting tissue or an organ uses the instrument.

A check valve for a fuel pump of a vehicle includes a retainer adapted to be disposed in an outlet member of the fuel pump. The check valve also includes a valve seat adapted to be disposed in the outlet member and spaced from the retainer. The check valve includes a valve member disposed in the outlet member between the retainer and the valve seat. The valve member has a closed position to engage the valve seat to prevent fuel from flowing through the outlet member and an open position to allow fuel to flow through the outlet member. The check valve further includes a magnet cooperating with the valve member for generating a magnetic force on the valve member to maintain a contact force between the valve member and the valve seat when the valve member is in the closed position.

The present invention relates to a method and an apparatus for controlling a high-pressure fuel supply pump configured to supply pressurized fuel to an internal combustion engine, with a solenoid-actuated intake valve being configured to be biased into a first direction towards a first stop position of the intake valve by means of a biasing force and being configured to be displaced against the biasing force into a second direction opposite to the first direction towards a second stop position of the intake valve by means of magnetic force and to be kept at the second stop position by means of magnetic force. The method includes applying control current to the solenoid-actuated intake valve for displacing the intake valve into the second direction to the second stop position and for keeping the intake valve at the second stop position during a first time period by means of magnetic force.

The second clutch is caused to transition to an engaged state after setting the second clutch in a slip state when the vehicle starts in the hybrid start mode, the temperature of a magnet of the electric motor is estimated based on the temperature of the hydraulic oil and an operating condition of the electric motor when the second clutch is controlled to be in the slip state; and an output torque and a lower limit rotation speed of the electric motor is restricted and reduced when the estimated temperature of the magnet exceeds a restrictive temperature.

A camera module includes a lens unit; a holder which houses the lens unit therein and is displaceable along an optical axis direction of the lens unit; a coil provided on the holder; a yoke, four main magnets and two flat plate-shaped auxiliary magnets which provide a magnetic field to the coil, in which the yoke has a roughly rectangular and relatively thin box shape of which bottom side is opened so that the yoke is defined by four side wall portions and a top plate portion, and the yoke also has an opening formed in the top plate portion for receiving the holder; upper and lower leaf springs respectively attached to the upper and lower cylindrical end portions of the holder for supporting the holder so as to be displaceable along the optical axis direction; and a base which supports the yoke and the lower leaf spring. In the camera module, the coil is formed into a roughly cylindrical shape having two opposite outer circumferential flat surfaces, each of the four main magnets has a triangle block shape and they are respectively arranged at the four corner portions inside the yoke, and the two auxiliary magnets are respectively arranged on a pair of the opposite side wall portions of the yoke so as to face the corresponding outer circumferential flat surfaces of the coil, respectively.

The invention discloses a heat dissipation-type LED lamp, which comprises a lampshade, the upper end of the lampshade is in threaded connection with a mounting plate in a penetrating manner; a lamp wick is fixed at the bottom of the mounting plate; two sets of symmetrically-arranged heat dissipation mechanisms are arranged in the lampshade.t he heat dissipation mechanism comprises a fixing plate fixed to the inner wall of the lampshade, an adjusting device is arranged at the upper end of the fixing plate, a liquid storage tank is fixed to the inner wall of the lampshade, a spraying groove is formed in the side wall of the liquid storage tank, and a spraying opening communicated with the interior of the liquid storage tank is formed in the inner wall of the spraying groove. The lamp has theadvantages that the air pressure in the liquid storage tank is increased through gasification of the diethyl ether solution; the gas-state diethyl ether pushes the magnetic block to enter the gas flow box, heat carried by the gas-state diethyl ether is absorbed by cooling liquid in the cooling box to be liquefied, heat in the lampshade is dissipated through gasification heat absorption and liquefaction heat dissipation of the diethyl ether, then cooling treatment in the lampshade is achieved, and the lamp wick is prevented from working at a high temperature.

Provided are a magnetic head, a magnetic recording medium, and a magnetic recording apparatus using the magnetic head and the magnetic recording medium. The magnetic head is used for magnetically recording data on a magnetic recording medium and includes a main pole; a return-yoke forming a magnetic path along with the main pole; a coil for inducing a magnetic field to emit a magnetic field for magnetic recording through an end tip of the main pole near a magnetic recording medium; and an insulating layer for electrically insulating the main pole from the return-yoke. The main pole is electrically connected to an external device and generates an electric field for assisting magnetic recording along the magnetic field for magnetic recording. In this structure, the coercive force of a magnetic recording layer can be reduced during magnetic recording so that data can be recorded at high density.

An electric motor has an armature rotatably accommodated inside a motor housing and a pair of magnets fixed to an inner surface of the motor housing so as to face the armature. The armature has an armature core 17 fixed to a rotating shaft 16, and ten slots S1 to S10 formed on the armature core accommodate coils. These slots S1 to S10 are of four types that are different in shape, thereby enhancing a lamination factor of each coil. Also, these slots S1 to S10 are formed so as to be tilted in a rotating direction with respect to an axial direction of the rotating shaft 16. Therefore, a magnetic imbalance caused by the slots S1 to S10 being formed in varying shapes is uniformized.

The invention relates to a generator, in particular to a high-speed generator directly driven by an air turbine, wherein the high-speed generator is used for an air vehicle. The high-speed generator directly driven by the air turbine comprises a generator outer shell, a generator receiver and a turbine rotor, and further comprises a permanent magnet combination and a coil winding, wherein an annular airflow channel is formed by the turbine rotor and the generator receiver, the permanent magnet combination is in an circular ring shape and fixed on the periphery of a final-level rotor body of the turbine rotor, the coil winding forms a cylindrical shape and is arranged on the outer surface of the generator receiver in a surrounding mode, and the coil winding is fixed on the generator receiver through the generator outer shell. The high-speed generator directly driven by the air turbine has the advantages of being high in specific power, high in design total pressure dropping ratio, capable of well and automatically balancing the acting force of airflow on a wheel hub, compact in structure, capable of carrying out automatic cooling and capable of providing cooling air sources for the external.

A shaft is press-fit into the valve member or the plunger of an electromagnetic valve to transmit the axial movement of the plunger to the valve member. A diameter reducing mechanism is provided for reducing the diameter of at least the press-fit portion of the shaft so that the diameter of the shaft is decreased by a press-fitting force applied to the shaft by the valve member and/or plunger. Deformation due to the press-fitting process is absorbed by the shaft, so deformation of the valve member and/or plunger is inhibited. Accordingly, it is unnecessary to give a large margin to a plunger side air gap, and magnetic efficiency can be improved. Also, two chambers on both axial sides of the plunger can communicate with each other through a clearance provided by the C-shaped cross-section, an inner hole and a penetration hole of the shaft. Therefore, it is unnecessary to form any separate groove or hole in the plunger for respiration.

A tool holder holding a rotating tool can be sucked in a direction of a rotational axis of a spindle and a direction perpendicular to the direction of the rotational axis, using a chuck. A projection is provided on an outer peripheral surface of the tool holder, and caused to collide against another projection with the spindle kept rotating, to displace the tool holder. Thus, runout and dynamic balance of the rotating tool are adjusted.

The invention discloses an automatic hair-mounting device for a paint brush head. The structure of the automatic hair-mounting device for a paint brush head comprises an integrated quick hair sortingdevice, a control panel, a control cabinet, a dust belt, a body, a support Frame, mobile wheels, a power indicator, wherein the integrated quick hair-splitting device is installed inside that body; the bottom of both ends of the body is fixedly connected with the top of the support frame; the movable wheels are sequentially connected into a rectangular structure and arranged at the bottom of the support frame; the back of the power indicator is fixedly connected with the front side of the left end of the body; the bottom of the control cabinet is vertically connected with the top of the body;the side of the control panel is embedded in the front side of the control cabinet; the left end of the machine body is provided with a dust belt; and when the automatic hair-mounting device for a paint brush head is used, the same thickness and shape of the wool installed on the paint brush head can be quickly sorted, so that not only the working intensity of the staff can be reduced, but also the working efficiency of the equipment can be improved, and the quality of the automatic bristle loading of the paint brush head can be improved.

The invention provides a mobile device of an inner-pipeline detection device as well as a launching method and a receiving method of the inner-pipeline detection device by using the mobile device. The mobile device comprises a pallet, wherein the longitudinal length of the pallet is not less than the length of the inner-pipeline detection device, and the shape of the pallet enables the pallet to be capable of holding a part of the inner-pipeline detection device in the radial direction. According to the mobile device, the pipeline inner-detection device can be held by the non-magnetic pallet so that the inner-pipeline detection device can be separated from the internal wall of a launching-receiving spherical cylinder in the process of launching and receiving the inner-pipeline detection device. Therefore, the magnetic force generated between the inner-pipeline detection device and the launching-receiving spherical cylinder is reduced, the pipeline inner-detection device is conveniently launched to a predetermined position in the launching-receiving spherical cylinder, and then the position of the inner-pipeline detection device can be kept with only extracting the pallet, thereby greatly reducing the possibility of damageing the inner-pipeline detection device.