Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
February 19, 2008
Patent Application Number
11208468
Date Filed
August 18, 2005
Patent Primary Examiner
Patent abstract
A camera has an axially moveable cylinder retaining a lens and a piezo ceramic motor for axially moving the cylinder. The motor has a piezo ceramic drive member that incrementally advances the cylinder in response to the application of an electric potential and a piezo ceramic brake that locks the cylinder against movement. The drive member and the brake are alternately energized to advance the cylinder in a series of incremental steps.
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