An apparatus for sealing a puncture communicating with a blood vessel includes an inner member slidable within an outer member, and a balloon coupled to distal ends of the inner and outer members. A proximal end of the outer member includes a port for delivering fluid into the balloon, and a cylinder...http://www.google.de/patents/US7331979?utm_source=gb-gplus-sharePatent US7331979 - Apparatus and methods for sealing a vascular puncture
