Electrical short stroke linear actuator

Details Electrical short stroke linear actuator Electrical short stroke linear actuator

2007-06-05

2007-06-05

Enad, Elvin (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

C335S220000, C310S015000, C310S012060

Reexamination Certificate

active

10343951

ABSTRACT:
An electrical short stroke actuator, comprising an annular filed collar and a composite plunger for travelling therethrough. In its simplest form, the plunger comprises two permanent magnets with like poles facing, and which are housed within a thin walled tube, and separated by a central spacer. By judicious choice of the spacing of the magnets, and the length of the field coil, a substantially constant thrust profile is achieved over a pre-selected stroke of the field coil relative to the plunger. The thrust may be augmented by fabricating the means used for spacing the magnets wholly or in part from ferromagnetic material, and also adding collars, similarly fabricated, onto the outside face of each of the permanent magnets.

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patent: 63-129848 (1963-06-01), None
patent: 10-270243 (1998-09-01), None

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