Self-contained, moving needle syringe with hydraulic safety lock

Abstract

Abstract A SYRINGE FOR INJECTING AN INJECTABLE PREPARATION INTO A MUSCLE OR AREA OF A BODY OTHER THAN A VEIN OR ARTERY. THE SYRINGE INCLUDES A HOUSING HAVING A SUPPLY CHAMBER WHICH IS ADAPTED TO CONTAIN THE INJECTABLE PREPARATION IN A TANDEM ARRANGEMENT WITH A VACUUM CHAMBER WHICH IS FLUID-TIGHTLY SEPARATED FROM THE SUPPLY CHAMBER. AN ELONGATED HOLLOW NEEDLE EXTENDS INTO THE HOUSING AND HAS AN OUTLET END WHICH IS ADAPTED TO PENETRATE INTO THE BODY AND THROUGH WHICH THE INJECTABLE PREPARATION DISCHARGES, THE NEEDLE HAVING AN INLET FOR RECEIVING THE INJECTABLE PREPARATION. INITIALLY, HOWEVER, THIS INLET IS DISPLACED THROUGH THE VACUUM CHAMBER FOR REACHING THE SUPPLY CHAMBER. THE MOVEMENT OF THE INLET OF THE NEEDLE THROUGH THE VACCUUM CHAMBER IS BROUGHT ABOUT WHILE THE OUTLET END OF THE NEEDLE PENETRATES INTO THE BODY, SO THAT IF THE OUTLET END OF THE NEEDLE SHOULD HAPPEN TO PENETRATE INTO A VEIN OR ARTERY BLOOD WILL FLOW IN A REVERSE DIRECTION THROUGH THE NEEDLE INTO THE VACUUM CHAMBER. THE HOUSING CONTAINS A HYDRAULIC-TYPE BLOCKING DEVICE WHICH RESPONDS TO THE FLOW OF BLOOD INTO THE VACUUM CHAMBER FOR BLOCKING MOVEMENT OF THE INLET OF THE NEEDLE INTO THE SUPPLY CHAMBER, SO THAT IN THIS WAY INJECTION OF THE PREPARATION INTO A VEIN OR ARTERY IS AUTOMATICALLY PREVENTED.

Inventors

• 👤 Eric S Lichtenstein

Bibliographic Details