| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 335229000 |
With permanent magnet
| 71 |
| 335255000 |
With plunger-type armature
| 62 |
| 335278000 |
With casing or enclosure
| 10 |
| 335282000 |
Coil shape, structure or material
| 9 |
| 335266000 |
Plural coils or magnets control armature movement
| 8 |
| 335270000 |
Armature-mounting means
| 8 |
| 335279000 |
Armature shape, structure or material
| 7 |
| 335281000 |
Core or pole shape, structure or material
| 7 |
| 335222000 |
With relatively movable coil and permanent magnet (e.g., D'Arsonval type) position on the cathode ray tube)
| 6 |
| 335228000 |
With motion-conversion means (e.g., reciprocating to rotary motion)
| 6 |
| 335253000 |
With armature latch means (e.g., means to retain armature in open or closed position | 3 |
| 20080297288 | SOFT LATCH BIDIRECTIONAL QUIET SOLENOID - Embodiments of soft latching solenoids comprise a coil assembly ( | 12-04-2008 |
| 20130147584 | ELECTROMAGNETIC ACTUATOR - The invention relates to an electromagnetic actuator comprising a wire coil, an armature and a catch, wherein the armature can be moved in an actuation direction, and wherein the catch secures the armature within the electromagnetic actuator. In order to secure an armature of the electromagnetic actuator, extra parts are mounted to the electromagnetic actuator or the armature is attached via a spring. This results in bigger sizes or insufficient stopping characteristics. The present invention overcomes these disadvantages by locating a catch inside the electromagnetic actuator. | 06-13-2013 |
| 20160125992 | LINEAR ACTUATOR - A linear actuator ( | 05-05-2016 |
| 335277000 |
With shock absorption, vibration or bounce-preventing means | 2 |
| 20080224805 | PROPORTIONAL MAGNET - The invention relates to a proportional magnet, including a winding carried by a coil body, two pole shoes which project into the coil body from opposite sides and which are spaced apart axially from one another, and a gap provided between the pole shoes. The invention further includes a magnet armature, which is arranged within the winding in an axially displaceable manner substantially parallel to the longitudinal axis thereof. The axial movement of the magnet armature can be transmitted to a valve member. The invention still further includes an electrically conductive element, wherein the magnet armature can be moved through the element, wherein the element is formed from a basic body having an electrically conductive layer, and wherein the electrically conductive layer is applied separately to the basic body. | 09-18-2008 |
| 20150084726 | VARIABLE RELUCTANCE TRANSDUCERS - An example variable reluctance device includes a load structure connected to an armature through a connecting arm. The armature is positioned between two oppositely oriented core structures. A structural frame secures the core structures in a fixed position, forming gap regions between the core structures and the armature, forming a magnetic circuit. The armature is resiliently centered between the core structures by a spring, such that the gaps and are approximately equal in width when the armature is at rest. The device further includes a magnetic substance within the gaps that is compressed or stretched to allow movement of the armature. | 03-26-2015 |
| 335243000 |
Alternating current type | 2 |
| 20110298570 | Solenoid Device With Stable Activation - A solenoid may include a core having a junction surface; a plunger having a junction surface and located adjacent to the core; a shading ring located proximate to an interface between the core junction surface and the plunger junction surface, the shading ring having an outside diameter slightly smaller than the diameter of the core, and operable to produce a concentration of magnetic attraction within an annular range of the interface between a center of the interface and a location of the shading ring; wherein a contact region between the core junction surface and the plunger junction surface is substantially smaller than the respective junction surfaces and located proximate to the annular range of the concentration of magnetic attraction. | 12-08-2011 |
| 20090261929 | Electromagnetic actuating device being actuated by AC power and held by DC power - The present invention is disclosed by that the power source device is operatively controlled by the switching device to supply AC power to excite the driving coil thereby producing larger electromagnetic effect to obtain actuating force, and after actuation, the power source device being operatively controlled by the switching device is switched to provide DC power output of lower voltage to the driving coil thereby passing smaller current to maintain excitation while required operating characteristics of the electromagnetic actuating device are still ensured. | 10-22-2009 |
| 335223000 |
With relatively movable conductors (e.g., dynamometer) | 1 |
| 20130082808 | SOLENOID DONUT - A donut-shaped solenoid surrounds a central plate which spins clockwise or counter-clockwise while holding an object, such as a tube, inside the solenoid coils so that the tube and its contents can be moved through the solenoid's magnetic field. Although the plate interrupts the solenoid coils, the plate is a conductor which can maintain the conductivity of the coils and thus the strength of the magnetic field. The solenoid donut can be of any size, but is especially intended to be at the approximate scale of a microchip, so as to fit inside any kind of hand-held or portable device, such as a cell phone, tablet or a laptop computer. Multiple solenoid donuts can be stacked in series to function within larger-scale devices such as air-conditioners, generators, or automobiles. | 04-04-2013 |
| 335265000 |
Plural armatures actuated by single electromagnetic coil | 1 |
| 20140125437 | ELECTROMAGNETIC ACTUATOR DEVICE - An electromagnetic actuator device, comprising a coil unit ( | 05-08-2014 |
| Entries |
| Document | Title | Date |
|---|
| 20090058580 | Magnetic Levitation System and Method - A magnetic levitation system has a substantially circular levitation track that is magnetically repulsive and a substantially circular propulsion track adjacent the levitation track that is magnetically repulsive. The system further has an end effector, which has a first array of magnets positioned to magnetically interface with the levitation track and a second array of magnets positioned to magnetically interface with the propulsion track to create propelling magnetic forces. The system further has a rotation device for radially rotating the end effector over the levitation track until the end effector levitates and reaches a threshold speed such that the propelling magnet forces generated by the second array of magnets and the propulsion track tend to propel the end effector radially. | 03-05-2009 |
| 20090278640 | FIELD COIL ASSEMBLY OF ELECTROMAGNETIC CLUTCH FOR COMPRESSOR AND METHOD FOR MANUFACTURING THE SAME - The present invention relates to a field coil assembly of an electromagnetic clutch for a compressor and a method for manufacturing the same. A field coil assembly | 11-12-2009 |
| 20110063058 | ELECTROMAGNETIC ACTUATOR - In an electromagnetic actuator, an electromagnetic drive section forms a flux path between a plunger and an inner yoke, each member being made of magnetic material, and which drives the plunger in an axial direction through electromagnetic force, an operation section has a dog movable between a connection position where it is connected with a mating part and a release position where it is apart from the mating part in the axial direction, and which restrains movement of the mating part in a circumferential direction when the dog is at the connection position, and a retaining ring is interposed between the plunger and the dog such that relative movement of the dog to the plunger in the circumferential direction is permitted and relative movement of the dog to the plunger in the axial direction is restricted. | 03-17-2011 |
| 20110148554 | ELECTROMAGNETIC MULTI-AXIS ACTUATOR - An electromagnetic multi-axis actuator, which can realize small size, light weight and low power consumption while being capable of performing multi-axis motion by overcoming limitations in a driving range, compared to a typical electrostatic actuation scheme or a typical electric motor actuating scheme. The electromagnetic multi-axis actuator includes an actuating unit ( | 06-23-2011 |
| 20130093547 | ELECTRO-MECHANICAL DEVICE AND ASSOCIATED METHOD OF ASSEMBLY - A method of setting an air gap between an electromagnetic coil and an armature of an electro-mechanical device to be within a desired range includes applying a sensing signal to the electromagnetic coil and monitoring at least one electrical characteristic of the electromagnetic coil. The at least one electrical characteristic is related to a size of the air gap and the sensing signal. The method further includes moving the armature towards the electromagnetic coil to reduce the size of the air gap and stopping movement of the armature towards the electromagnetic coil when the at least one electrical characteristic indicates the size of the air gap is within the desired range. | 04-18-2013 |
| 20130321110 | Single-Pole Electromagnetic Transit - A methodological system contained within a single-poled electromagnetic repulsive circuit allowing objects to be transported securely within the boundaries created by the single-poled electro-magnetic environment. This invention introduces a 3 (three) phase rhetorical theory and the indoctrination of the term “single bi-polar electromagnetic repulsion,” of which regulates competitive interaction among objects placed in motion and creates motion within the framework of principled engineered objects. | 12-05-2013 |
| 20130342296 | ROTARY SOLENOID - A rotary solenoid ( | 12-26-2013 |
| 20140184369 | ACTUATOR - An actuator has an electrically conductive coil which has a longitudinal axis and a plurality of turns and a magnet arranged at a distance from the turns in radial direction relative to the longitudinal axis. The coil is partially covered by a central region of a first conducting element on a side which faces away from the magnet and the magnet is partially covered by a mid region of a second conducting element on a side facing away from the turns of the coil. The first conducting element projects beyond the coil and the second conducting element projects beyond the magnet in the direction of the longitudinal axis and there each have collar-like projections. The coil has a first winding turns region and a second winding turns region. | 07-03-2014 |
| 20140300435 | ELECTROMAGNETIC ACTUATOR - There is provided an electromagnetic actuator which can secure a sufficient thrust force at least at a certain level over a wide range of displacement. The electromagnetic actuator | 10-09-2014 |
| 20150371747 | OPERATION DEVICE - An operation device for performing an operation input on a play machine has an operation unit, a support that rotatably supports the operation unit, a first magnetic member that rotates integrally with the operation unit, a second magnetic member in which a magnetic force acts between the first magnetic member and the second magnetic member, and a switching unit that switches a distance between the first magnetic member and the second magnetic member. | 12-24-2015 |
