US Patent 7332848 Method of damping actuator and actuator

Patent 7332848 was granted and assigned to Akita Prefecture on February, 2008 by the United States Patent and Trademark Office.

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Patent Inventor Names

Shigeki Mori0

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Patent abstract

An actuator includes a piezoelectric element, and a displacement enlargement mechanism which has a movable portion configured to be displaced as the piezoelectric element is displaced and enlarges an amount of displacement of the piezoelectric element. A restraint member is fixed to the movable portion with an elastic or viscoelastic body therebetween and convert vibrational energy of the movable portion into thermal energy based on deformation of the elastic or viscoelastic body, thereby lowering a resonance peak amplitude of the actuator.

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Official Website

https://pdfpiw.uspto.gov/.piw?Docid=073328480

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