专利名称：Needleless valve发明人：Mark Christopher Doyle申请号：US09911133申请日：20010723公开号：US06541802B2公开日：20030401
专利附图：
摘要：A needless valve is described which avoids the suctioning problems of the priorneedleless devices upon deactivation and which preferably provides a positive self-purging effect. The valve is self-purging at the end of an administration cycle, avoidingclogging of attached catheters or other devices, and ensures that substantially all of
liquid received into the valve is delivered to the receiver. The valve is also extremelysimple in design and easy to construct and assemble, since it consists of only threepieces. The valve has a base with a connector for fluid communication attachment totubing or other device, a solid elongated fluid channeling rod, and an internal fluid flowconduit; a flexible hollow expandable and contractible plug fitting over and moveablealong the rod; and a tubular housing fitting over the plug and attached to the base. Whenthe valve is activated by insertion of a nozzle of a fluid source, the rod and plug wallcooperate so that as the plug retracts along the rod, it is stretched and its interiorexpanded. Upon deactivation, the plug contracts, the interior volume decreases, and theresiling plug wall forces residual fluid within the valve to be expelled through the outlet,purging the residual fluid from the valve. No negative pressure is formed, so nosuctioning of blood or other fluid from a patient or receiver occurs.
申请人：ALARIS MEDICAL SYSTEMS, INC.
代理机构：Fulwider Patton Lee & Utecht, LLP
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