US 6,982,535 B2 | ||
Feeder | ||
Kouji Kosaka, Hachiouji (Japan) | ||
Assigned to Japan Science & Technology Agency, Kawaguchi (Japan); and Kumamoto Technology Incorporated, Kumamoto-ken (Japan) | ||
Appl. No. 10/502,626 PCT Filed Jun. 28, 2002, PCT No. PCT/JP02/06551 § 371(c)(1), (2), (4) Date Jul. 26, 2004, PCT Pub. No. WO2004/003930, PCT Pub. Date Jan. 08, 2004. |
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Prior Publication US 2005/0218851 A1, Oct. 06, 2005 | ||
Int. Cl. B23Q 5/28 (2006.01) |
U.S. Cl. 318—575 | 9 Claims |
1. A feed drive apparatus comprising drive leg having an extension/contraction deforming part and a shear deforming part,
said extension/contraction deforming part being extended so that the tip of said drive leg comes in contact with a moving
element or with a fixed side, and said shear deforming part deforms laterally by shear in the drive direction or the reverse
direction to drive a moving element,
wherein sine wave drive voltages are respectively applied to said extension/contraction deforming part and said shear deforming
part, and the mean values of drive voltages applied to the extension/contraction deforming part and the shear deforming part
are substantially zero.
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