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| United States Patent | 6787943 |
| Link to this page | http://www.wikipatents.com/6787943.html |
| Inventor(s) | Godkin; Mikhail (San Diego, CA) |
| Abstract | A linear voice coil actuator is disclosed which includes field
subassemblies each including a field blank, and in which at least a one of
the field subassemblies includes magnets of alternating polarity
positioned on the field blank to form interleaved-magnetic circuits in a
direction of motion of the linear voice coil actuator. The field
subassemblies are positioned with respect to one another to form a gap
between the field subassembly having the magnets, and another of the field
subassemblies. Also included is a coil assembly that includes coils
positioned in a plane within the gap, wherein the plane is substantially
parallel to the direction of motion of the linear voice coil actuator. The
field blanks include flux path sections which provide a flux path
perpendicular to the direction of motion for each pair of magnets of
opposite polarity that are separated by the gap, and which thereby results
in the height of the actuator of the present invention being largely
independent of the lengths of the magnets employed. |
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Title Information  |
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| Publication Date |
September 7, 2004 |
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| Filing Date |
December 20, 2002 |
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| Parent Case |
RELATED APPLICATIONS
The present application claims priority under 35 U.S.C. .sctn.119(e) from
provisional application No. 60/343,488, filed Dec. 21, 2001. |
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Title Information |
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| Market Size |
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Estimate the gross annual revenues of the relevant market
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| Market Share |
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| Reasonable Royalty |
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Public's "Guesstimation" of Royalty Value
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Market Review |
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Technical Review |
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Claims |
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What is claimed is:
1. A linear voice coil actuator including
a plurality of field subassemblies each comprising a field blank, wherein
at least a first one of the plurality of field subassemblies includes a
plurality of magnets of alternating polarity positioned on the field blank
to form interleaved-magnetic circuits in a direction of motion of the
linear voice coil actuator, wherein each of the plurality of magnets has
opposing ends which are substantially parallel to the direction of motion;
and further wherein the plurality of field subassemblies are positioned
with respect to one another to form a gap between the first one of the
plurality of field subassemblies which includes the plurality of magnets,
and another of the plurality of field subassemblies, and to provide at the
opposing ends of the magnets a transverse flux path through the field
blanks in a plane transverse to the direction of motion, and
a coil assembly that includes coils positioned in a plane within the gap,
wherein the plane is substantially parallel to the direction of motion of
the linear voice coil actuator;
and wherein the plurality of magnets are magnetized in directions
perpendicular to the direction of motion of the linear voice coil
actuator.
2. The linear voice coil actuator of claim 1, wherein the plurality of
magnets have the same widths in the direction of motion of the linear
voice coil actuator.
3. The linear voice coil actuator of claim 1, wherein the magnets are paced
apart with respect to one another.
4. The linear voice coil actuator of claim 1, wherein the plurality of
magnets have different widths in the direction of motion of the linear
voice coil actuator.
5. The linear voice coil actuator of claim 1, wherein the plurality of
magnets are in contact with one another.
6. The linear voice coil actuator of claim 1, wherein the field blanks
further include flux path sections positioned to provide, for each of the
plurality of magnets of the first one of the plurality of field
subassemblies and a corresponding portion of a field blank of another one
of the plurality of field subassemblies positioned across the gap from the
magnet, a the transverse flux path through the field blanks in the plane
transverse to the direction of motion of the linear voice coil actuator.
7. The linear voice coil actuator of claim 1, wherein a second one of the
plurality of field subassemblies includes a plurality of magnets of
alternating polarity positioned on the field blank to form
interleaved-magnetic circuits in a direction of motion of the linear voice
coil actuator, so that pairs of magnets of opposite polarity from the
first and second ones of the plurality of subassemblies are separated by
the gap, and further wherein the field blanks further include flux path
sections positioned to provide, for each of the pairs of magnets of
opposite polarity that are separated by the gap, the transverse flux path
through the | | |
