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US Patent 7198619 Valve syringe

Patent 7198619 was granted and assigned to Ultradent Products, Inc. on April, 2007 by the United States Patent and Trademark Office.

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Current Assignee
Ultradent Products, Inc.
Ultradent Products, Inc.
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7198619
Date of Patent
April 3, 2007
Patent Application Number
10397545
Date Filed
March 25, 2003
Patent Primary Examiner
‌
Manuel Mendez
Patent abstract

Valve syringes of the invention include a syringe barrel and an applicator valve adapted to rotate relative to the barrel between closed and open positions. In the open position, one or more slots in the applicator valve align with one or more holes in a discharge end of the syringe barrel in order to allow fluid material to flow therethrough. In a closed position, the contact surface of the applicator valve occludes the holes in the barrel in order to seal them and prevent flow of fluid material therethrough. The valve syringe may include structure that increases the sealing engagement between the syringe barrel and applicator valve when rotated toward at least one of the open or closed positions. The applicator valve may include an applicator tip that is either integrally or detachably connected to the applicator valve. The valve syringe may also include a plunger adapted to expel fluid material contained in the syringe barrel through the discharge end and into the applicator valve. An end of the plunger may be tapered or otherwise configured so as to conform to the shape of the discharge end of the syringe barrel.

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