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US 6,633,458 B2Granted
Rotary piezoelectric microactuator with an optimum suspension arrangement
AssigneeSAE Magnetics (H.K.) Ltd.
InventorsKai Wu, Tamon Kasajima, Masashi Shiraishi, Ping Shang
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Abstract
The invention relates to a microactuator comprising a movable structure having a symmetric axis about which the movable structure are divided into two parts which can produce the same movement but in opposite directions; two active arms built with piezoelectric material; two stationary structures to connect the two active arms at their two ends, respectively. The invention also relates to a disk drive suspension which is incorporated with the microactuator.
Claims9
A microactuator, comprising:
- a structure, symmetrical about an axis and divided into two parts about said axis, to provide symmetrical motion in opposite directions, wherein
- each of said two parts has an active arm, each active arm including piezoelectric material;
- wherein each active arm is generally curved in a direction opposite to a curvature of the other arm rigid.
Dependencies are inferred from the claim text.