Patent ID: 6398763
Filing Date: 2002-06-04
Classification: A61C,A61M,B05C

Abstract:
In a syringe having a barrel, an improved plunger for providing both sealed storage, and then later delivery of highly viscous and other dental compositions with improved control as the plunger is pushed through the barrel to express the composition, the improved plunger comprising:a hollow stem formed from a tubular sidewall, and comprising a first end that extends beyond the syringe barrel so that the plunger can be pushed into the barrel to express the composition contained therein, and a second end which extends into the barrel of the syringe, and which comprises a tip that is formed as an integral extension of the tubular sidewall, said tip comprising a face that forms a wall for enclosing the second end of the stem, and a means for defining a continuous, essentially flat, smooth contact surface which is an extension of the tubular sidewall and is outwardly flexed but becomes more flattened against the syringe barrel when pushing the plunger against the dental composition, said contact surface serving to both seal the composition within the barrel for purposes of storage, and to provide controlled delivery when pushing the plunger in order to express the dental composition when it is desired to use the composition.