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)
10/1990
10/30/1990US4967309 Dual current sensing driver circuit
10/30/1990CA1275693C Balanced self-shielded gradient coils
10/24/1990CN1010141B Explosion-test type electro/displacement converter device
10/23/1990US4965695 Permanent magnetic retaining device to move, affix or carry ferromagnetic parts or loads with electronic switching of the magnetic flux to release the carried load
10/23/1990US4965543 Magnetic trip device with wide tripping threshold setting range
10/23/1990US4965521 Method and apparatus for compensating eddy current effects in a magnetic resonance device having pulsed magnetic field gradients
10/23/1990US4964830 Magnetic device
10/18/1990WO1990012239A1 Sealing means for fluid handling system
10/18/1990DE4010268A1 Magnetic forming of metals - using electric-magnet with superconductive coils
10/17/1990EP0392072A1 Fluid mass flow control system
10/17/1990EP0391994A1 Control device for textile machines.
10/17/1990EP0215832B1 Solenoidal magnet with high homogeneity magnetic field
10/17/1990CN2063992U Magnetic seat type fluid sucktion pump
10/16/1990US4964014 Controlling an electrical current
10/16/1990US4964013 Electric noise absorber
10/13/1990CA2011736A1 Method and means for metal working using superconducting magnetohydrodynamics
10/11/1990DE4007468A1 Control circuit for pulsed magnets - avoids high peak current loading of battery
10/11/1990DE3911431A1 Integratable free-wheeling circuit
10/11/1990DE3910810A1 Circuit arrangement for a solenoid (electromagnetic) valve
10/09/1990CA1275015A1 Electromagnetically-actuated positioning mechanism
10/04/1990DE3909551A1 Solenoid valve
10/03/1990EP0390519A1 Electromagnetic force valve driving apparatus
10/03/1990EP0390422A1 Valve stepping drive apparatus
09/1990
09/27/1990DE3908545A1 Adjustment drive for a throttle of an internal combustion engine
09/26/1990EP0203354B1 Process and circuit for the control of a valve
09/25/1990US4959629 High torque rotary solenoid
09/25/1990US4959273 Corrosion-resistant permanent magnet and method for preparing the same
09/25/1990CA1274573A1 Translation movement direct current electro-magnet
09/20/1990WO1990010877A1 Magnet system
09/20/1990DE3908546A1 Adjustment drive for a throttle of an internal combustion engine
09/20/1990DE3908350A1 Electrical coil
09/19/1990EP0387321A1 Solenoid plunger magnet and its use as print hammer in print hammer devices
09/11/1990US4955334 Control apparatus for valve driven by electromagnetic force
09/07/1990WO1990010151A1 Electromagnetic high-pressure injection valve
09/04/1990US4954800 Magnet and method of manufacturing the same
09/04/1990US4954799 Proportional electropneumatic solenoid-controlled valve
09/04/1990US4954781 Nuclear magnetic resonance imaging apparatus with reduced acoustic noise
09/04/1990US4953590 Electromagnetic directional control valve
09/04/1990US4953555 Permanent magnet structure for a nuclear magnetic resonance imager for medical diagnostics
09/04/1990CA1273693A1 Search coil assembly for metal detectors and method for making same
08/1990
08/30/1990DE3905937A1 Method and apparatus for controlling a solenoid (electromagnetic) valve
08/29/1990EP0384663A1 Electromagnetic force valve driving apparatus
08/29/1990EP0384206A1 Electromagnet with a plunger
08/29/1990EP0383769A1 Device for cooling a resistive magnet
08/28/1990US4953056 Current detection apparatus for use in electromagnetic actuator drive circuit
08/23/1990WO1990009286A1 Electromagnetic drive device for the printing needle of a needle printing head
08/23/1990WO1990009095A2 Magnetic field transfer device and method
08/23/1990DE4004734A1 Anordnung zum betreiben eines elektrischen oder elektromagnetischen geraetes oder bauteiles Operate arrangement for an electrical or electromagnetic device or component
08/22/1990EP0383457A1 Multilayered eddy current type power-saved intense AC magnetic field generator
08/22/1990EP0383064A1 Magnet armature
08/22/1990EP0383063A1 Magnet armature
08/22/1990EP0382759A1 Bobbin, magnet including such bobbin, imaging device by nmr comprising such a magnet and method for making such a magnet
08/22/1990CN1009321B Magnetic fastener
08/21/1990US4951023 Electromagnetic drive apparatus having a flat coil
08/21/1990US4949452 Method for making search coil assembly for metal detectors
08/16/1990DE3904056A1 Elektromagnetische antriebsvorrichtung fuer eine drucknadel eines druckkopfes Electromagnetic drive device for a pressure needle of a printer head
08/15/1990CN2060592U Network magnetic attractive board
08/14/1990US4949044 Apparatus for mapping a static magnetic field
08/14/1990US4949043 Apparatus for rendering a static magnetic field uniform
08/14/1990US4948093 Solenoid valve
08/08/1990EP0380693A1 Plunger type electromagnet
08/07/1990US4947283 Solenoid drive circuit
08/07/1990US4946132 Magnet armature
08/01/1990CN2060011U Direct-push type bidirection magnetic maintainer
07/1990
07/31/1990US4945446 Magnetic field compensating apparatus
07/31/1990US4945331 Electromagnetic actuator
07/31/1990US4945330 Actuator
07/31/1990US4944486 Electromagnetically actuatable valve and method for its manufacture
07/31/1990CA1272282A1 Method and device for controlling an electromagnet excited by a periodic current to operate a mobile element
07/31/1990CA1272086A1 Electromagnetically-actuated positioning system
07/31/1990CA1272085A1 Electromagnetically-actuated positioning system
07/31/1990CA1272084A1 Electromagnetically-actuated positioning mechanisms
07/26/1990WO1990008260A1 Magnetically actuated positive displacement pump
07/26/1990WO1990005986A3 Magnetic field generating assembly
07/26/1990DE3940242A1 Betaetigungssolenoid Actuating solenoid
07/24/1990US4943774 Magnetic field control apparatus
07/24/1990CA1271992A1 Magnetic ring for detecting the rotation of an object
07/24/1990CA1271987A1 Plug tube for nmr magnet cryostat
07/24/1990CA1271986A1 Ferromagnetic shield for magnetic resonance magnets
07/23/1990CA2008163A1 Magnetically actuated positive displacement pump
07/19/1990DE3901129A1 Linear drive
07/17/1990US4942098 Corrosion resistant permanent magnet
07/17/1990US4941235 Magnetic lock closure device
07/12/1990WO1990007781A1 Electronic circuit arrangement
07/12/1990WO1990007774A1 Deposited permanent magnet for hard and easy axes biasing of a magnetoresistive head
07/12/1990WO1990007773A1 Permanent magnet shaped to provide uniform biasing of a magnetoresistive reproduce head
07/12/1990WO1990007639A1 Electromagnetic valve actuator
07/12/1990WO1990007637A1 Electromagnetic valve actuator
07/12/1990WO1990007636A1 Electromagnetic valve actuator
07/12/1990WO1990007635A1 Electromagnetic valve actuator
07/12/1990WO1990007634A1 Electromagnetic valve actuator
07/11/1990EP0377214A1 Device for controlling an electric current
07/10/1990US4940958 Polarized electromagnetic apparatus
07/05/1990DE3844413A1 Multiple armature magnet
07/05/1990DE3844412A1 Proportional valve activated on one side and having a safety device
07/05/1990DE3844193A1 Elektronische schaltungsanordnung Electronic circuit arrangement
07/04/1990EP0376716A1 Control apparatus for valve driven by electromagnetic force
07/04/1990EP0376715A2 Electromagnetic-force valve-driving apparatus
07/04/1990EP0376493A1 Control circuit
07/04/1990EP0376057A2 Electromagnetic transducers and method of making them
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