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| Number | Title | Issue Date |
| 8093766 | Cylindrical linear motor armature, cylindrical linear motor field pole, and cylindrical linear motor using them A cylindrical linear motor capable of solving the problem that a leak flux links an aluminum frame at both ends of an armature of a conventional cylindrical linear motor, which causes a viscous braking force as a motor brake force, is provided. The cylindrical linea... | 01/10/2012 |
| 7989994 | Cylinder-type linear motor and moving part thereof The present invention provides a cylinder-type linear motor capable of shortening the total motor length with respect to a predetermined stroke length and capable of being operated as a brushless DC motor without a sensor means for sensing the position of a moving p... | 08/02/2011 |
| 7898121 | Linear actuator A linear actuator includes permanent magnet annuli arranged about an armature core for axial movement in a tubular stator upon energization of coils arranged in concentric association with the armature. The stator has portions extending radially inwards of the coils... | 03/01/2011 |
| 7851952 | Voice coil motor with guiding posts and stopping bars An exemplary voice coil motor includes a hollow stationary magnetic field generator, a movable magnetic field generator, two elastic members, a hollow case and a base. The movable magnetic field generator is received in the stationary magnetic field generator. The t... | 12/14/2010 |
| 7830047 | Linear motor geometry for use with persistent current magnets An electrically powered launcher is disclosed that can accelerate small payloads to orbital velocities. The invention uses a novel geometry to overcome limitations of other design, and allows full exploitation of existing superconducting materials. ... | 11/09/2010 |
| RE41827 | Electromagnetic actuator An electromagnetic actuator includes a fixed core supported by a bottom wall of a housing, a movable core arranged opposite to the fixed core via an air gap to drive the movable member, and coil assembly supported by the housing to surround both the cores, wherein t... | 10/19/2010 |
| 7808134 | Active control mount magnetic optimization for an engine A solenoid (10) includes a shell (12), a lower stator member (20) associated with the shell, and an upper stator member (30) in the shell. The upper stator member is separate from the lower stator member and has a wire receiving member ( | 10/05/2010 |
| 7768160 | Electromagnetic motor to create a desired low frequency vibration or to cancel an undesired low frequency vibration Electromagnetic motor with a slider that moves linearly with respect to the stator in either direction. Embodiments include slider internal or external the stator. Slider includes one magnetic flux producing element in all embodiments. Internal slider embodiments st... | 08/03/2010 |
| 7696654 | Linear motor not requiring yoke A linear motor not requiring a yoke structure is provided. A first unit forming a stator is constructed of two permanent magnet rods. The permanent magnet rods each have a magnetically permeable shaft and a permanent magnet row having a plurality of permanent magnet... | 04/13/2010 |
| 7679228 | Electromagnetic actuator In an electromagnetic actuator including a bearing member which slidably supports a variable core, a yoke for retaining a coil assembly by cooperation with a bottom wall of a housing is connected to the housing, and the bearing member is fitted into the yoke. A supp... | 03/16/2010 |
| 7679227 | Working machine with an electromagnetic converter Machine with an electromechanical converter, where a linear movable piston (30) is placed in a tubular cylinder casing (20). The piston supports a row of centrally placed annular permanent magnets (38) which produce an electromagnetic field of f... | 03/16/2010 |
| 7633189 | Cylinder-type linear motor and moving parts thereof The present invention provides a cylinder-type linear motor capable of shortening the total motor length with respect to a predetermined stroke length and capable of being operated as a brushless DC motor without a sensor means for sensing the position of a moving p... | 12/15/2009 |
| 7615894 | Electric motor with a permanent magnet carrier rotating a sprocket A high voltage, low current electric motor. The motor comprises a drive shaft turned by a sprocket that is driven by an assembly of electromagnets. A carrier supporting permanent magnets travels in a tubular track formed into an endless loop around the sprocket. The... | 11/10/2009 |
| 7608949 | Sliding door comprising a magnetic support and/or drive system comprising a row of magnets A magnetic drive system for driving a door leaf in a driving direction is disclosed. The drive system includes a row of magnets disposed in the driving direction and having a longitudinal direction, the magnets being arranged so that magnetizations of the magnets re... | 10/27/2009 |
| 7576456 | Linear actuator In a linear actuator (1), on the inside of a rectangular tubular movable element (3), a linear guide (14) that supports the movable element (3) so as to be linearly movable is positioned at a center of the movable element (3), and ... | 08/18/2009 |
| 7449803 | Electromagnetic motor to create a desired low frequency vibration or to cancel an undesired low frequency vibration Electromagnetic motor with a slider that moves linearly with respect to the stator in either direction. Embodiments include slider internal or external the stator. Slider includes one magnetic flux producing element in all embodiments. Internal slider embodiments st... | 11/11/2008 |
| 7443060 | Acoustic compressor with two resonators A resonator of an acoustic compressor is provided at each side of an actuator so that the two resonators are arranged side by side. Two pistons are provided at the inner ends of the resonators and actuated by the actuator. At the outer end of the each of the resonat... | 10/28/2008 |
| 7436088 | Electromagnetic exciter An electromagnetic exciter includes a magnetic circuit device composed of an outer yoke, a flat magnet arranged within the outer yoke, and an inner yoke mounted on the magnet, and a casing within which the magnetic circuit device is contained. The casing has a flat ... | 10/14/2008 |
| 7414374 | Continuously variable frequency swinging armature motor and drive Disclosed herein is a power device. The power device has a power source; timing circuitry powered by the power source for producing a current pulse output having a pulse width; a switch for triggering the current pulse output produced by the timing circuitry; an arm... | 08/19/2008 |
| 7397161 | Outer core assembly structure of linear motor Disclosed herein is an outer core assembly structure of a linear motor. At least one of a plurality of core sheets is an extended core sheet having a length greater than that of the other core sheets. Consequently, easy and convenient alignment of first and second o... | 07/08/2008 |
| 7397152 | Circuitry for increasing efficiency of a linear electric generator A linear electric generator (LEG) includes sections of coils of an induction coil assembly (ICA) disposed along a distance d1 and apparatus for passing a permanent magnetic assembly (PMA) of length d2, where d2 is less than d1, along the ... | 07/08/2008 |
| 7378765 | Cylinder-type linear motor and moving part thereof The present invention provides a cylinder-type linear motor. The motor includes a fixed part including a coil assembly having a plurality of ring-shaped coils arranged in the axial direction to form a cylindrical space, and a yoke member made of a magnetic material,... | 05/27/2008 |
| 7372178 | Linear actuator or generator with rods The invention concerns an electrical machine, whereof the active part includes a global solenoid winding (110, 210, 310) for each phase and includes, inside said winding(s), a stack of ferromagnetic or non-magnetic parts (400) and magnetized parts (... | 05/13/2008 |
| 7367786 | Linear compressor A linear compressor includes: a cylinder block forming a compressing chamber; a piston reciprocatably provided in the compressing chamber; a reciprocating member connected to the piston to reciprocate with the piston as a single body; a driver driving the reciprocat... | 05/06/2008 |
| 7362013 | Linear motor, exposure apparatus using the same, and device manufacturing method In a movable magnet-type linear motor including a stator having a plurality of iron core elements arranged at a certain slot pitch and a movable part having a magnet 3 which is movable in an arrangement direction one or more pseudo-slots are provided between ... | 04/22/2008 |
| 7350332 | Wall-mounted sliding door system and method A sliding wall-mounted interior door system that includes a telescoping door actuating mechanism that is attached to the upper portion of the door, and a roller assembly that extends horizontally from the wall and engages a track in the lower portion of the door. Th... | 04/01/2008 |
| 7350763 | Linear solenoid with adjustable magnetic force A linear solenoid includes a pole tube; a housing jacket that encloses the pole tube; a coil that encompasses the pole tube; and a displaceable armature that is received in the pole tube. An overlap range between the housing jacket and an axially displaceable compon... | 04/01/2008 |
| 7352142 | Apparatus and method for controlling stroke of reciprocating compressor An apparatus for controlling an operation of a reciprocating compressor includes a voltage detecting unit for detecting a positive half-wave voltage of an AC voltage applied to a motor of the reciprocating compressor; a current detecting unit for detecting a positiv... | 04/01/2008 |
| 7352268 | High intensity radial field magnetic actuator At least one set of two magnets is provided, at least one of the magnets having an outer magnet portion, a middle magnet portion, and an inner magnet portion. The outer magnet portion has a magnetization pointing in an at least partially axial direction. The middle ... | 04/01/2008 |
| 7347221 | Solenoid valve A valve assembly comprises two valves and a single solenoid actuator with only one magnetizing coil that controls both valves. The corresponding magnetic circuit comprises a yoke with only two pole pieces. The valves are arranged concentric to one another. The valve... | 03/25/2008 |
| 7332825 | System and method for controlling a power generating system This invention overcomes the disadvantages of the prior art by providing a power generating system particularly suitable for field use in remote locations, which is fuel-efficient, relatively quiet, tolerant of dust, capable of operating on low grade logistics and d... | 02/19/2008 |
| 7328688 | Fluid pumping apparatus, system, and method A fluid pumping apparatus, system, and method are disclosed in which an apparatus according to one embodiment of the invention comprises a housing, an inlet through which the fluid enters the housing, an outlet through which the fluid leaves the housing, a valve com... | 02/12/2008 |
| 7327054 | Linear actuator comprising velocity sensor A linear actuator for a motion system is provided with a velocity sensor for monitoring a velocity of an actuation arm that it is driving. The linear actuator comprises a magnetic field, a first coil that is controllably movable within the magnetic field by adjustin... | 02/05/2008 |
| 7323800 | Outer stator for reciprocating motor and manufacturing method thereof An outer stator of a reciprocating compressor comprises: a bobbin formed as a ring shape and provided with a winding coil therein; an outer stator frame coupled to an outer circumferential surface of the bobbin and formed of a magnetic body in which a flux flows; a ... | 01/29/2008 |
| 7323798 | Microwave displacement measurement system for an electrodynamic direct drive An electrodynamic direct drive includes an armature that travels within a housing and a drive system for moving armature in relation to housing. The drive system has two drive means, that are moved in relation to each other in the form of a coil system with at least... | 01/29/2008 |
| 7309934 | Linear electric generator having an improved magnet and coil structure, and method of manufacturing Linear electric generators include stationary windings and armature magnets arranged to reciprocate axially relative to the windings, or stationary magnet structures and movable windings arranged to reciprocate relative to the stationary magnet structures. The armat... | 12/18/2007 |
| 7309933 | Vibrator for acting on an object in a predetermined direction and apparatus for producing concrete blocks The invention relates to a vibrator for acting on an object in a predetermined direction, comprising a casing and two identical, synchronously driven, electric linear motor coils arranged mirror-symmetrically therein, between which coils there is an armature which c... | 12/18/2007 |
| 7298101 | Continuously variable frequency swinging armature motor and drive Disclosed herein is a power device. The power device has a power source; timing circuitry powered by the power source for producing a current pulse output having a pulse width; a switch for triggering the current pulse output produced by the timing circuitry; an arm... | 11/20/2007 |
| 7295388 | Lens module A lens module using electromagnetic force to drive the focus-adjusting lens is disclosed. The lens module includes a base, two steel plates, four springs, a bottom plate, a lens holder, a coil, a lens, a top plate, two magnets, a magnet housing and a top cover. The ... | 11/13/2007 |
| 7291941 | Tandem arrangement linear motor A linear motor including a plurality of movers (1a to 1c), each of which is formed with an armature having a polyphase balancing winding (Ru to Rw), and a stator having a permanent magnet or a secondary conductor is configured such that t... | 11/06/2007 |
