Electromagnetic linear actuator with position sensor
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United States of America Patent
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Nov 16, 2004
Grant Date -
N/A
app pub date -
Oct 23, 2001
filing date -
Apr 23, 1999
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A ferromagnetic actuator having, in a housing, a ferromagnetic circuit defining an axial travel interval for an armature (22) of ferromagnetic material for axially driving a rod between two extreme positions in which the armature bears against poles of the ferromagnetic circuit, resilient return means provided to hold the valve at rest in a middle position between the extreme positions, and at least one coil carried by the circuit and enabling the armature to be brought in alternation into both positions. The rod carries a radially-magnetized bar of length not less than the travel distance of the armature, and the housing carries at least one magnetic flux sensor placed in a zone having low exposure to the field created by the coil(s).
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