Did You Know...
...that on Dec. 15, 1836, the Patent Office was completely destroyed by fire? Lost were some 7,000 models, 9,000 drawings, and 230 books plus all records of patent applications and grants.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7843293 | Bistable magnetic drive for a switch Disclosed is a magnetic drive for an electrical switch, including a linear armature (26) displaceable between two ends positions, a shunt body (27) mounted at a distance from said armature and means (24, 25, 30, 31) for generating a magnetic fie... | 11/30/2010 |
| 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 |
| 7338029 | Compact solenoid A compact solenoid including a coil and a frame located outside the coil for constituting a magnetic circuit. The frame includes four bars extending in parallel to the axial direction of the coil and located proximate to the outer circumferential face of the coil. E... | 03/04/2008 |
| 7319374 | Moving magnet actuator An apparatus includes an electromagnetically conductive assembly including a first member having a first end and a second end and a second member disposed between the first end and the second end of the first member. The second member and the first end of the first ... | 01/15/2008 |
| 7302867 | Magnetic transducer torque measurement A magnetic transducer element is formed by rotating an integral region of a shaft about an axis in the presence of a magnetic source. An annulus of magnetization results in having its magnetization in the axial direction. The exterior magnetic field emanated by the ... | 12/04/2007 |
| 7280019 | Single coil solenoid having a permanent magnet with bi-directional assist A single coil solenoid includes a permanent magnet with bidirectional assist capabilities. The solenoid includes an armature that during de-energization of a single coil of wire is attracted to the permanent magnet thereby maintaining a hold position and during ener... | 10/09/2007 |
| 7275468 | Rotary fast tool servo system and methods A high bandwidth rotary fast tool servo provides tool motion in a direction nominally parallel to the surface-normal of a workpiece at the point of contact between the cutting tool and workpiece. Three or more flexure blades having all ends fixed are used to form an... | 10/02/2007 |
| 7234482 | Servovalve with torque motor The servovalve with torque motor consists of a cylindrical case (3) in which an armature (1) is arranged on one end of an arm (16) and a orifice (18) closing a nozzle (19) with working liquid (2) on the other side of the arm... | 06/26/2007 |
| 7219876 | Electromagnetic valve apparatus The force to draw an armature of an electromagnetic valve apparatus driving a valve for opening or closing a high-pressure liquid passage is increased and valve bouncing is alleviated by a surface of the core being flat and a surface of the armature facing the surfa... | 05/22/2007 |
| 7182051 | Electromechanical valve actuator for internal combustion engines and internal combustion engine equipped with such an actuator An electromechanical valve actuator for internal combustion engines, equipped with a polarized electromagnet and with a magnetic plate switches between a first position close to the electromagnet and a second position remote from the electromagnet, the switching tim... | 02/27/2007 |
| 7121506 | Remotely controlled model airplane having deflectable centrally biased control surface A remotely controlled model airplane includes a receiver responsive to signals from a transmitter to control the direction of flight of the model airplane. The receiver, powered by a battery, demodulates the signal transmitted by the transmitter to selectively energ... | 10/17/2006 |
| 7102475 | Magnetic actuator A magnetic actuator includes a first yoke, an armature which is provided inside the first yoke and made movable in reciprocating motion along a first direction inside the first yoke, first and second coils fitted inside the first yoke, a pair of second yokes affixed... | 09/05/2006 |
| 7052484 | Drive mechanism for an injection device A drive mechanism for an injection device is disclosed in which piston means 306 are selectively driven to expel medicament from within a medicament cartridge 40. A drive mechanism for controlling the movement of the piston means is described comprisin... | 05/30/2006 |
| 7046109 | Multi-contact type relay by electromagnet The present invention relates to a multi-contact type relay in which power is supplied to a load through a BCM (Body Control Module) in accordance with a switching signal from an integration switch, and two coils provided in a relay are selectively activated in acco... | 05/16/2006 |
| 7015778 | Actuator device The actuator device includes a rotation body and a rotation restriction plate. The rotation axis of the rotation body is placed on the rotation axis holding member. The rotation restriction plate is placed on the side opposite the rotation axis holding member with r... | 03/21/2006 |
| 6960848 | Electromagnetic drive device and light quantity adjustment device using the same An electromagnetic drive device includes a coil frame with a hollow tubular shape, a magnet rotor rotatably disposed in the coil frame through a rotational shaft, a transmission member for transmitting a rotation of the magnet rotor, and a coil wound around an outer... | 11/01/2005 |
| 6935373 | Electro-magnetically operable device An electro-magnetically operated device is described in which a magnetisable armature, typically a length of thin naturally resilient mild steel, is sandwiched between, and extends from, two parts of a magentic circuit which contains an air gap into which the armatu... | 08/30/2005 |
| 6926454 | Electromagnetic driving unit and light quantity regulating apparatus using the same An electromagnetic driving unit includes a rotor having a central shaft and formed of a permanent magnet with a hollow cylindrical shape; an inner yoke disposed on an inner circumferential side of the rotor; an outer yoke disposed on an outer circumferential side of... | 08/09/2005 |
| 6920681 | Method of preparing an electromagnetic actuator using a substrate An electromagnetic actuator includes a stationary member, a movable member magnetically coupled with the stationary member with a gap therebetween, and a support member for displaceably supporting the movable member relative to the stationary member. Both the statio... | 07/26/2005 |
| 6908398 | Automatic swing device A swing device has a supporter, a seat suspended on the supporter to swing in front and back directions, a permanent magnet installed in the seat, and an electromagnet installed to face the permanent magnet in a swing path to have the same polarity as that of the pe... | 06/21/2005 |
| 6906605 | Electromagnet system for a switch An electromagnet system for a switch includes a main magnetic circuit including a magnet yoke and a magnet armature mechanically linked to a contact apparatus. At least one permanent magnet is disposed in the main magnetic circuit for generating a holding force for ... | 06/14/2005 |
| 6414577 | Core with coils and permanent magnet for switching DC relays, RF microwave switches, and other switching applications A core with coils and permanent magnet, and a movable magnet holder including permanent magnet and contained within a channel defined by a magnet holder housing is provided. By aligning the north and south poles of the two permanent magnets in relation to... | 07/02/2002 |
| 6366189 | Solenoid A solenoid (1) comprising at least two stationary coils (2, 3), which are located axially beside each other and are current supplied at the same time, and at least one magnetically active element (4, 5), such as a permanent magnet or a soft iron part. The... | 04/02/2002 |
| 6337612 | Switch using solenoid The present invention provides a switch using solenoid comprising a base having a plurality of grooves formed thereon; a plurality of solenoids having an armature respectively, and being disposed on each of the grooves, wherein the armature is moved in up... | 01/08/2002 |
| 6262648 | Electromagnetic actuator Electromagnetic actuator for moving a contact into a switched-on or switched-off state, comprising a contact-actuating rod which is displaceable in the longitudinal direction between a first position, corresponding to the switched-off state, and a second ... | 07/17/2001 |
| 6130594 | Magnetically driven electric switch The present invention relates to a switch with a magnetic drive having an armature movable linearly between two end positions and connected to at least one switch contact, which is under the influence of magnetically generated forces in the end positions.... | 10/10/2000 |
| 6057750 | Magnet device with double fixing positions for changing the magnetic circuit A magnet device with double fixing positions for changing the magnetic circuit is provided, and includes an external housing whose inner edge is fitted with a coil The inside of the external housing includes a space for the axial movement of an iron core.... | 05/02/2000 |
| 6040752 | Fail-safe actuator with two permanent magnets An electromagnetic actuator has two permanent magnets arranged along their polar axes, with the proximal poles having same polarity. An electromagnet surrounds the two permanent magnets and, when energized, overrides the repulsion between the proximal pol... | 03/21/2000 |
| 6028499 | Monophase, short travel, electromagnetic actuator having a good electric power/force ratio A monophase electromagnetic actuator including at least a ferromagnetic part integral with a member movable along a direction Y, a fixed stator part made of soft magnetic material and including at least on electrical coil, and a thin transversely magnetiz... | 02/22/2000 |
| 6005462 | Electromagnetic core-energy actuator An electromagnetic actuator device converts electrical energy to mechanical energy by the interaction of two types of closed magnetic circuits. A first closed magnetic circuit functions to generate high magnetic intensity in a portion of a ferromagnetic c... | 12/21/1999 |
| 5959519 | Electromagnetic switching device A switch device including an inner yoke and an outer yoke are arranged around the winding of an electromagnetic block, and a plate-shaped permanent magnet is inserted between the two yokes. A highly efficient actuation of the switching device is achieved ... | 09/28/1999 |
| 5905423 | Magnetically retained polymeric solenoid tip A permanent magnet armature solenoid has a tip formed of a non-magnetic material operably connected to a ferromagnetic insert which is firmly held to the end of the magnetic armature by the magnetic attraction between the insert and armature. The magnetic... | 05/18/1999 |
| 5896076 | Force actuator with dual magnetic operation An electromagnetic active vibration actuator configuration combines two modes of operation to obtain the advantages of long stroke and linearity of voice coil type actuators and high efficiency of dual-gap solenoid type actuators. A coaxial stator shell s... | 04/20/1999 |
| 5883557 | Magnetically latching solenoid apparatus A magnetically latching solenoid apparatus is characterized by a non-magnetic armature carrying a permanent magnet having poles aligned with the throw axis of the device. The poles of the magnet are substantially aligned with corresponding pole pieces and... | 03/16/1999 |
| 5867081 | Bistable electromagnetic relay arrangement A polarized bistable electromagnetic relay arrangement comprising at least two monostable instantaneous electromagnetic relay devices with a L-shaped yoke, a permanent magnet disposed between both relay devices so that one magnetic pole be magnetically co... | 02/02/1999 |
| 5821841 | Microceramic linear actuator A microceramic linear actuator includes a unitary ceramic body which has been formed with an internal cavity; a piston mounted for linear movement within the internal cavity and having a micromagnet with first and second poles of opposite polarity, and at... | 10/13/1998 |
| 5627504 | Electromagnetic actuating device, in particular for a valve Electromagnetic actuating device, in particular for a valve, includes a plunger which is axially movable between two extreme positions, an electromagnetic coil surrounding the plunger actuating it, and a permanent magnet holding the plunger in one of its ... | 05/06/1997 |
| 5546063 | Magnetic field solenoid The solenoid includes an electrical coil having a central opening in which is fixedly located a rod formed of a material of the type capable of being magnetized when in a magnetic field. A plunger is supported for movement toward and away from one end of ... | 08/13/1996 |
| 5379032 | Impulse transducer enunciator An impulse transducer that does not use eccentric, motor-driven weights is constructed of a permanent magnet movable armature that oscillates within a housing and impacts resilient bumpers to produce vibrations. The armature is accelerated by a varying ma... | 01/03/1995 |
| 5327112 | Electromagnetic actuator of the type of a relay An electromagnetic actuator (1) of the type of a relay, having an armature (2) polarized by a permanent magnet (5) and a movable drive element (6) attracted by the armature (2) against a spring means (8), incorporates an electric current sensor consisting... | 07/05/1994 |
