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Class Information
Number: 335/230
Name: Electricity: magnetically operated switches, magnets, and electromagnets > Magnets and electromagnets > With magneto-mechanical motive device (e.g., electromagnet with armature) > With permanent magnet > Polarized electromagnet
Description: Subject matter wherein the permanent magnet is combined with the electromagnet such that the movement of the armature is responsive to the direction of current flow in the armature controlling circuit.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7234482 |
Servovalve with torque motor |
Jun. 26, 2007 |
| 7182051 |
Electromechanical valve actuator for internal combustion engines and internal combustion engine equipped with such an actuator |
Feb. 27, 2007 |
| 7121506 |
Remotely controlled model airplane having deflectable centrally biased control surface |
Oct. 17, 2006 |
| 6414577 |
Core with coils and permanent magnet for switching DC relays, RF microwave switches, and other switching applications |
Jul. 2, 2002 |
| 6366189 |
Solenoid |
Apr. 2, 2002 |
| 6337612 |
Switch using solenoid |
Jan. 8, 2002 |
| 6262648 |
Electromagnetic actuator |
Jul. 17, 2001 |
| 6130594 |
Magnetically driven electric switch |
Oct. 10, 2000 |
| 6057750 |
Magnet device with double fixing positions for changing the magnetic circuit |
May. 2, 2000 |
| 6040752 |
Fail-safe actuator with two permanent magnets |
Mar. 21, 2000 |
| 6028499 |
Monophase, short travel, electromagnetic actuator having a good electric power/force ratio |
Feb. 22, 2000 |
| 6005462 |
Electromagnetic core-energy actuator |
Dec. 21, 1999 |
| 5959519 |
Electromagnetic switching device |
Sep. 28, 1999 |
| 5905423 |
Magnetically retained polymeric solenoid tip |
May. 18, 1999 |
| 5896076 |
Force actuator with dual magnetic operation |
Apr. 20, 1999 |
| 5883557 |
Magnetically latching solenoid apparatus |
Mar. 16, 1999 |
| 5867081 |
Bistable electromagnetic relay arrangement |
Feb. 2, 1999 |
| 5821841 |
Microceramic linear actuator |
Oct. 13, 1998 |
| 5627504 |
Electromagnetic actuating device, in particular for a valve |
May. 6, 1997 |
| 5546063 |
Magnetic field solenoid |
Aug. 13, 1996 |
| 5379032 |
Impulse transducer enunciator |
Jan. 3, 1995 |
| 5327112 |
Electromagnetic actuator of the type of a relay |
Jul. 5, 1994 |
| 5272458 |
Solenoid actuator |
Dec. 21, 1993 |
| 5268662 |
Plunger type electromagnet |
Dec. 7, 1993 |
| 5202658 |
Linear proportional solenoid |
Apr. 13, 1993 |
| 5200727 |
Force generating apparatus |
Apr. 6, 1993 |
| 5170144 |
High efficiency, flux-path-switching, electromagnetic actuator |
Dec. 8, 1992 |
| 5150090 |
Electromagnetic polar relay |
Sep. 22, 1992 |
| 5083744 |
Motor-operated valve |
Jan. 28, 1992 |
| 5035254 |
Power transmission |
Jul. 30, 1991 |
| 5024127 |
Punching mechanism |
Jun. 18, 1991 |
| 5014031 |
Ultra precision pressure regulator |
May. 7, 1991 |
| 5012144 |
Linear direct drive motor |
Apr. 30, 1991 |
| 5008641 |
Polarized armature contact relay |
Apr. 16, 1991 |
| 4999531 |
Electromagnetic actuators |
Mar. 12, 1991 |
| 4997002 |
Power transmission |
Mar. 5, 1991 |
| 4994776 |
Magnetic latching solenoid |
Feb. 19, 1991 |
| 4988907 |
Independent redundant force motor |
Jan. 29, 1991 |
| 4988074 |
Proportional variable force solenoid control valve |
Jan. 29, 1991 |
| 4940958 |
Polarized electromagnetic apparatus |
Jul. 10, 1990 |
| 4922217 |
Torque motor with magnet armature |
May. 1, 1990 |
| 4908592 |
Electromagnetic actuating device |
Mar. 13, 1990 |
| 4881054 |
Relay drive for polarized relay |
Nov. 14, 1989 |
| 4859975 |
Electromagnetic actuator |
Aug. 22, 1989 |
| 4855701 |
Polarized electromagnet |
Aug. 8, 1989 |
| 4855700 |
Dual conversion force motor |
Aug. 8, 1989 |
| 4851801 |
Microwave C-switches and S-switches |
Jul. 25, 1989 |
| 4847581 |
Dual conversion force motor |
Jul. 11, 1989 |
| 4843361 |
Electromagnet with permanent magnet held by a cage |
Jun. 27, 1989 |
| 4835503 |
Linear proportional solenoid |
May. 30, 1989 |
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