Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
July 2, 2019
Patent Application Number
15495871
Date Filed
April 24, 2017
Patent Citations Received
Patent Primary Examiner
Patent abstract
A pneumatic retractable syringe has a plunger having an interior retraction lumen. The plunger and syringe barrel have cooperating locking elements so that the plunger is locked after use within the syringe barrel. After injection of medicament is completed, the needle is retracted into the lumen by compressed gas that is released from a gas cell within the syringe when the gas cell is ruptured just before the plunger reaches the end of its downstream path of travel.
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