Seal assemblies, generally for use in trocar assemblies, are provided for selectively promoting movement of fluid away from a central portion of the seal assemblies. In one exemplary embodiment, an inner surface of a seal body of the seal assembly is configured to selectively promote such movement of...http://www.google.fr/patents/US8100929?utm_source=gb-gplus-shareBrevet US8100929 - Duckbill seal with fluid drainage feature
