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US 2008/0186118 A1Published application
Electromagnetic Drive Device
AssigneeSiemens Aktiengesellschaft
InventorsJorg Hagen, Carsten Protze
Life of this patent
Estimating the term…
Abstract
An electromagnetic drive system contains an armature that can be displaced along an axis. The armature contains a piston-shaped section. The piston-shaped section is guided in a cylindrical section of the stator. A recess extends through the piston-shaped section substantially in the direction of the axis. The incorporation of the recess results in that a fluid cushion that builds up in front of the piston-shaped section during rapid movement can be relieved through the piston-shaped section.
Claims13
1-10. (canceled)
An electromagnetic drive device, comprising:
- a stator having a cylindrical section and an axis;
- and
- an armature movable along said axis and having a section being in a form of a piston and being moved in said cylindrical section of said stator, said section having at least one recess formed therein and running generally in a same direction as said axis, said recess passing through said section.
Dependencies are inferred from the claim text.