Patent ID: 7710226
Filing Date: 2010-05-04
Classification: H01F

Abstract:
1. A linear solenoid, comprising: a) a first soft-iron pole member; b) a second soft-iron pole member, with said first and said second pole members disposed in a spaced-apart linear arrangement; c) a plunger disposed riding between said pole members; d) a permanent magnet mounted directly on said plunger; e) a bobbin having a first end and a second end; f) a first electro-magnet coil, with said first electro-magnet coil disposed proximate to said first end of said bobbin, g) a second electro-magnet coil, with said second electro-magnet coil disposed proximate to said second end of said bobbin, wherein said first electro-magnet coil and said second electro-magnet coil are not in electrical communication with each other; and wherein said linear solenoid does not have a flux return member.