发明名称 |
Pre-loaded actuator using piezoelectric element |
摘要 |
Pre-loaded piezoelectric actuators provide improved work piece displacement, frequency of repetition, accuracy and repeatability. Actuators may use a coil spring providing a compressive force adequate to substantially fully compress a laminated piezoelectric element on a non-destructive basis. Upon activation, a pre-loaded actuator delivers a full workpiece drive stroke because piezoelectric element axial compression has previously occurred. Pre-loading methods and pre-loading to damp out element oscillation are also disclosed.
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申请公布号 |
US5205147(A) |
申请公布日期 |
1993.04.27 |
申请号 |
US19910738156 |
申请日期 |
1991.07.30 |
申请人 |
FUJI ELECTRIC CO., LTD. |
发明人 |
WADA, TATUYA;HIKITA, HIROSHI;MACHIDA, NOBUTAKA;NONAMI, MITUHARU;KAWAMURA, YUKINORI;MATUMOTO, NORIKATU;OHMURA, YOSHIYUKI;NOMOTO, TETUO |
分类号 |
B21D28/00;B23Q1/34;B30B15/16;H01L41/053 |
主分类号 |
B21D28/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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