DUAL PIEZOELECTRIC STACK PLUNGER SUB-ASSEMBLY

A piezoelectric actuator is provided for use within the barrel of a liquid medication delivery syringe. The actuator includes a plunger, a frame attached to the plunger, an advance piezoelectric unit disposed within the frame, and a lock piezoelectric unit disposed within the frame. Each of the piez...

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Bibliographische Detailangaben
1. Verfasser:	PIZZOCHERO, Alessandro E
Format:	Patent
Sprache:	eng
Schlagworte:	DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE
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Beschreibung
Zusammenfassung:	A piezoelectric actuator is provided for use within the barrel of a liquid medication delivery syringe. The actuator includes a plunger, a frame attached to the plunger, an advance piezoelectric unit disposed within the frame, and a lock piezoelectric unit disposed within the frame. Each of the piezoelectric units includes a number of piezoelectric elements arranged such that application of an electric field to piezoelectric elements of the lock unit causes the elements to expand in a radial direction of the barrel, locking the frame in position within the barrel. Application of an electric field to piezoelectric elements of the advance unit cause the elements to expand in an axial direction of the barrel, pumping liquid medication, disposed within the syringe, out of the barrel.