Super magnetostriction type actuator
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United States of America Patent
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Nov 1, 1994
Grant Date -
N/A
app pub date -
Oct 7, 1993
filing date -
Oct 7, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a super magnetostriction type actuator constructed such that a super magnetostriction rod is extended/contracted by application of a magnetic field from a solenoid coil, and a drive object is moved in response to the extension/contraction, a locating member for locating the super magnetostriction rod thermally deforms in correspondence with a thermal expansion of the super magnetostriction rod so as to permit an extension of the super magnetostriction rod due to the thermal expansion thereof. As a result, variation in spring loading and lift with thermal expansion of the super magnetostriction rod can be avoided. Also, the magnetostriction characteristic of the locating member is opposite that of the super magnetostriction rod allowing for greater relative movement of the super magnetostriction rod upon application of a magnetic field.
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