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Application filed by Іван Іванович Назаренко, Иван Иванович НазаренкоfiledCriticalІван Іванович Назаренко
Priority to UA99127124ApriorityCriticalpatent/UA36498A/en
Publication of UA36498ApublicationCriticalpatent/UA36498A/en
Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof
(AREA)
Abstract
The invention relates to building machines, in particular to mechanisms for compacting building mortars and earths. To basis of invention problem on increase of area of use of machine due to increase of range frequencies of stable vibrations and provision of optimal mode of operation by pre-set law of motion is placed.
An acoustical piezoelectric vibrator and a speaker using the piezoelectric vibrator a piezoelectric vibrator characterized in that: a vibration control piece is secured to a piezoelectric vibration plate at the peripheral portion thereof.