Patent ID: 7048721
Filing Date: 2006-05-23
Classification: A61M

Abstract:
1. A needleless syringe, comprising: a plastic body having walls defining an interior space surrounded by said walls, said interior space having an inner surface, a first region with one end open to an outside, and a second region adjacent to said first region, one of said walls having an output opening formed therein in said second region leading to the outside; a glass ampule containing a medicine disposed in said first region and having ends; plunger-type stoppers, including a first stopper and a second stopper, disposed at and sealing both of said ends of said glass ampule, said second stopper being distal from said first stopper in said plastic body; a ram positioned within said plastic body, said ram pushing said first stopper along said glass ampule and into said second region; said first and second stoppers being surrounded by said inner surface along an entire traverse path of said first and second stoppers; said first stopper having a first periphery and said second stopper having a second periphery and said first and second peripheries abutting said inner surface along said entire traverse path of said first and second stoppers; and said inner surface of said second region having a ventilation opening formed therein, thereby, upon injection, content of said second region escaping through said ventilation opening and only content of said glass ampule being injected though said output opening.