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.
Prior Publication US 2005/0218851 A1, Oct. 06, 2005
Int. Cl. B23Q 5/28 (2006.01)
U.S. Cl. 318—575 9 Claims
OG exemplary drawing
 
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.