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US 2008/0164964 A1Published application
Latching linear solenoid
OwnerVictor Nelsoninventor
Life of this patent
Estimating the term…
Abstract
A linear solenoid includes a pair of soft iron pole members, which are in a spaced-apart linear arrangement. A permanent magnet is attached to the end of a plunger, which rides between the pole members. When a first of two electro-magnet coils is energized, the plunger which is latched to one of the pole members is repelled to the opposite pole member and latched. When the second coil is energized, the plunger returns to the original pole member and is latched.
Claims27
A linear solenoid comprising:
- a hollow bobbin having a first end and a second end;
- a first pole member disposed within said hollow bobbin proximate to said first end of said hollow bobbin;
- a second pole member disposed within said hollow bobbin proximate to said second end of said hollow bobbin, with said first and said second pole members spaced apart;
- a plunger slidably mounted relative to said pole members with said plunger having
- a first end and a second end;
- a first electro-magnet coil disposed on said bobbin;
- and
- a first permanent magnet mounted on said plunger, with said permanent magnet attracted to and latched to a selected one of said pole members until said first electro-magnet coil is energized whereby said permanent magnet is repelled from said selected one of said pole member and is attracted and latched to the previously unselected pole member.
5 more elements
A linear solenoid comprising:
- a magnetically permeable core member, with said core member having a first pole portion and a second pole portion, with said first and said second pole portions defining a gap therebetween;
- a first electro-magnet coil disposed on said core member;
- plunger means, with said plunger means slidably mounted on said first pole portion;
- permanent magnetic means mounted on said plunger means and disposed projecting into said gap, with said permanent magnet means magnetically latched to said first pole portion until said first electro-magnetic coil is energized whereby said permanent magnet means is repelled from said first pole portion and attracted to said second pole portion and latched to said second pole portion.
1 more element
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 on said plunger;
- e) a first electro-magnet coil, with said first electro-magnet coil disposed proximate to said pole members,
- with said permanent magnet latched to said first pole member until said first electro-magnet coil is energized so as to allow said permanent magnet to be repelled from said second pole member and be latched to said second pole member.
3 more elements
Dependencies are inferred from the claim text.