An apparatus for penetrating a bone marrow of a bone is provided. The apparatus includes a housing comprising a handle and a trigger mechanism, a spring-loaded assembly comprising a rod and a shaft; and a connector comprising a first end operable to connect to the drive shaft and a second end operable...http://www.google.de/patents/US20050165403?utm_source=gb-gplus-sharePatent US20050165403 - Impact-driven intraosseous needle
