Patent ID: 6450993
Filing Date: 2002-09-17
Classification: A61M

Abstract:
A half-disposable syringe barrel comprising:a syringe barrel which is a hollow tubular body in which a plunger is fitted; a cap member in which an emulsion ring, a ventilation ring and an O-ring are disposed, the emulsion ring being formed with a membrane, the cap member being detachably fitted with front end of the syringe barrel, whereby when sucking a medicine, the emulsion ring and the membrane thereof form a protective film covering the wall of the syringe barrel to isolate the medicine and the wall of the syringe barrel, after used, the cap member being detached from the syringe barrel and discarded, while the syringe barrel and the plunger being recovered; and wherein the peripheral wall of the ventilation ring is formed with multiple vents through which the air in the syringe barrel escapes.