A retractable safety needle assembly is provided. The needle assembly includes a tubular outer body, a retraction assembly contained with the outer body and a biasing element for applying a retraction force therebetween. The retraction assembly includes a cannula having an intravenous puncture tip and...http://www.google.es/patents/US20030040717?utm_source=gb-gplus-sharePatente US20030040717 - Retracting needle safety device
Número de solicitud: 10/215,386 Número de publicación: US 2003/0040717 A1 Fecha de presentación: 8 Ago 2002 Patente emitida: US7182734 ( Fecha de emisión 27 Feb 2007)
