Patents
Sitemap › H01 - Basic electric elements › H01F - Magnets; Inductances; Transformers; Selection of materials for their magnetic properties › H01F 7 - Magnets
Patents for H01F 7 - Magnets (20,067)
05/1991
05/16/1991WO1991006758A1 Dual lift electromagnetic fuel injector
05/15/1991EP0382721B1 Dynamic energy absorber
05/15/1991CN2077154U Axial sliding energy-saving electromagnet
05/14/1991US5015093 Electromagnet for an atomic absorption spectrometer
05/08/1991CN1051265A Magnetic material for use in bulgar alarm system
05/07/1991US5014032 Cylindrical permanent magnet with longitudinal induced field
05/07/1991US5014031 Ultra precision pressure regulator
05/07/1991US5014030 Electromagnetically activated mechanisms
05/07/1991US5014028 Triangular section permanent magnetic structure
05/07/1991US5014027 Electromagnetic contactor
05/07/1991CA1283947C D.c. power control for d.c. solenoid actuators
05/02/1991WO1991006110A1 Magnetic valve
05/02/1991WO1991006109A1 Electromagnet
05/02/1991WO1991006108A1 Monophase electromagnetic actuator
05/02/1991EP0425169A2 Electrical energy storage system
05/02/1991EP0425024A2 Circuit for limiting the output voltage of a monolithic semiconductor power device which drives a resonant load connected to a power supply
05/02/1991EP0424600A1 Magnet apparatus for use in a magnetic resonance imaging system
04/1991
04/30/1991US5012144 Linear direct drive motor
04/30/1991US5011380 Magnetically actuated positive displacement pump
04/28/1991CA2028388A1 Electrical energy storage system
04/24/1991EP0424280A1 Electronic control circuit for a direct current energised pulse motor
04/24/1991EP0423245A1 An electromagnetic actuator of the type of a relay
04/24/1991EP0423110A1 Cryogenic recondenser with remote cold box
04/23/1991US5010312 Solenoid actuators
04/23/1991US5010310 Alternating current immunized relay and method of immunizing a relay to alternating current
04/23/1991US5009389 Electromagnetic force valve driving apparatus
04/23/1991US5009202 Electromagnetically operated valve assembly for use in internal combustion engine
04/20/1991WO1991006963A1 Optimum design of two dimensional permanent magnets
04/20/1991CA2067812A1 Optimum design of two-dimensional permanent magnets
04/18/1991DE3934287A1 Magnetventil Solenoid valve
04/18/1991DE3933758A1 Elektromagnet Electromagnet
04/17/1991EP0423045A1 Electromagnetic valve, especially actuated by a cyclic electrical signal
04/17/1991EP0422746A2 Improved expulsive separation apparatus
04/17/1991EP0422264A1 Solenoid valve
04/17/1991EP0422228A1 Electromagnetic valve actuator
04/16/1991US5008773 Solenoid valve control circuit
04/16/1991US5007464 Electromagnetic weft brake
04/11/1991DE3933630A1 Differential coil arrangement for metal object detection - has whole number of coil segments connected together symmetrical to central main plane
04/11/1991DE3932191A1 Surge-suppression circuit for switched inductive loads - uses varistor to limit induced EMF and diodes to steer current into ballast-resistor
04/11/1991DE3928644A1 Magnetic ring generating rotary magnetic field - has even number of magnets, with opposite ones of different polarisation
04/10/1991CN1050642A Power saving speed adjusting and remanence erasure by torque type electromagnet
04/09/1991US5006901 Electromagnet with plunger
04/09/1991US5006804 Method of optimizing shim coil current selection in magnetic resonance magnets
04/09/1991US5006672 Apparatus for storing high magnetic fields having reduced mechanical forces and reduced magnetic pollution
04/03/1991CN1050463A Magnetic holding type tractive electromagnet and control circuit thereof
04/03/1991CN1050362A Electromagnetic disc brake for elevator lifting apparatus
04/02/1991US5004940 Direct drive valve force motor with gain shaping provision
04/02/1991US5004162 Solenoid actuated valve assembly
04/02/1991CA1282457C Magnetic field screens
03/1991
03/28/1991DE3931050A1 Testing appts. for acceleration sensors - uses electromagnet to impact sliding carriage holding sensor to desired acceleration value
03/27/1991EP0419352A1 Electromagnetic valve with permanent magnet
03/27/1991CN1050283A Energy saving flash electromagnet
03/27/1991CN1012235B Process for manufacturing permanent magnet
03/26/1991US5002835 Armature insert
03/26/1991CA1282051C Solenoid valve with contractible assembly ring
03/19/1991US5001448 Shield for a magnet
03/19/1991US5001447 Ferromagnetic compensation rings for high field strength magnets
03/19/1991US5000421 Electromagnetic solenoid valve with variable force motor
03/19/1991US5000420 Electromagnetic solenoid valve with variable force motor
03/19/1991US5000417 Magnetic fixing member for a paper box
03/19/1991CA1281605C Electromagnetic positioning system for gas exchange valves
03/12/1991US4999600 Cylindrical permanent magnet to produce a transversal and uniform induction field
03/12/1991US4999559 Control electromagnet
03/12/1991US4999531 Electromagnetic actuators
03/12/1991US4998976 Permanent magnet arrangement
03/07/1991WO1991003063A1 Electromagnetic rotating actuator
03/07/1991WO1991003062A1 Electromagnetic rotating actuator
03/06/1991CN2072719U Multi-purpose strong magnetic sticking piece
03/05/1991US4998177 Electromagnetic solenoid drive apparatus in a vehicle
03/05/1991US4998083 Yokeless permanent magnet structure and method of construction
03/05/1991US4996764 Method of manufacturing an electromagnetically actuatable valve
02/1991
02/28/1991DE3928066A1 EM valve opening and closing device - has two magnet systems of small dimensions to reduce reaction time
02/27/1991EP0414528A2 Ferromagnetic compensation rings for high field strength magnets
02/27/1991EP0414443A1 Refrigerated MR magnet support system
02/26/1991US4995744 Dot matrix
02/23/1991CA2013936A1 Ferromagnetic compensation rings for high field strength magnets
02/21/1991WO1991002367A1 Electrical governor
02/21/1991DE3927150A1 Magnetic valve with short stroke armature - pole cure and magnetic armature cooperating via protrusion and corresp. recess
02/21/1991DE3926911A1 Elektromagnetischer drehsteller An electromagnetic rotary table
02/21/1991DE3926909A1 Elektromagnetischer drehsteller An electromagnetic rotary table
02/20/1991EP0413571A1 Magnet cartridge for magnetic resonance magnet
02/20/1991CN1011745B Two-way proportional ehectromagnet with amplifier and without excitating coil
02/19/1991US4994777 Enhanced magnetic field within enclosed cylindrical cavity
02/19/1991US4994776 Magnetic latching solenoid
02/19/1991US4994109 Method for producing permanent magnet alloy particles for use in producing bonded permanent magnets
02/19/1991US4993325 Magnetic field generator
02/17/1991CA2017478A1 Magnet cartridge for magnetic resonance magnet
02/17/1991CA2015511A1 Refrigerated mr magnet support system
02/13/1991EP0412743A1 Process for producing injection-moulded sinterings
02/13/1991EP0412394A2 Method and apparatus for compensating eddy current effects in a magnetic resonance device having pulsed magnetic field gradients
02/12/1991US4992768 Permanent to be located in the reticulum stomach chamber of a ruminant animal
02/12/1991US4992767 Magnet roll
02/12/1991US4992766 Linear actuator
02/12/1991US4991270 Magnetic lock closure
02/12/1991CA2021877A1 Method and apparatus for compensating eddy current effects in a magnetic resonance device having pulsed magnetic field gradients
02/07/1991WO1991001277A1 Magnetic fluid conditioner
02/07/1991DE4018960A1 Self-colouring electromagnetic stamp - with reciprocating plunger displaced against return spring by energising surrounding coil
02/07/1991DE3925794A1 Electromagnetically-actuated vale e.g. for automatic transmission - has conical poles to increase effective air gap
02/06/1991EP0411697A1 Magnetic bearings
02/06/1991EP0410985A1 Magnetic sealing device and process for producing the same
1 ... 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 ... 201