Patent ID: 6077245
Filing Date: 2000-06-20
Classification: A61M

Abstract:
A disposable medical syringe apparatus with retractable needle, comprising:a syringe barrel body having a proximal end and a distal end with a central bore;said proximal end of said central bore of said syringe barrel body receiving a detachable needle hub adapted to receive a needle;said detachable needle hub releasably secured within said proximal end of said syringe barrel body, said detachable needle hub reciprocable within said central bore of said syringe barrel body when said detachable needle hub is released;an evacuated plunger assembly having a tubular member with proximal and distal ends, said evacuated plunger assembly reciprocable within said central bore of said syringe barrel body, said exterior of said proximal end of said evacuated plunger assembly being fitted with wiping gaskets that seal the exterior of said tubular member of said evacuated plunger assembly within the interior of said syringe barrel body;said evacuated plunger assembly having a combination part releasably secured on said proximal end of said tubular member;said combination part sealing within said tubular member of said evacuated plunger assembly to maintain a pressure differential between the interior of said tubular member of said evacuated plunger assembly and the atmosphere; and,said combination part having a central bore therethrough and a pressure differential seal positioned therein, said pressure differential seal sealing said central bore of said combination part when said tubular member is evacuated, said combination part axially moveable within said tubular member when released.