Patent ID: 7163515
Filing Date: 2007-01-16
Classification: A61B

Abstract:
1. A blood-collecting apparatus for obtrusively obtaining a blood sample from an intruder at a crime scene to be later analyzed for DNA, comprising: a blood-extracting needle for penetrating the skin of said intruder; a blood-collecting reservoir connected in fluid communication to said blood-extracting needle for receiving said blood sample, wherein said connected blood-extracting needle and blood-collecting reservoir form a needle-reservoir assembly; a first chamber, including a means for mounting said needle-reservoir assembly on said first chamber and a means for holding an initial vacuum in said first chamber; a cylindrical casing defining a cylindrical interior and a facing at a distal first end of said cylindrical casing having a center hole for receiving said needle-reservoir assembly, wherein said first chamber is slidably mounted in said cylindrical interior; a means for propelling said needle-reservoir assembly into contact with said intruder; a means responsive to said contact for distally advancing said blood-extracting needle through said center hole, thus promoting insertion of said needle-reservoir assembly into said intruder; and a coil spring positioned adjacent the interior side of said facing, including a means for retaining and securing said coil spring in a normally biased mode, and configured to extract and eject said needle-reservoir assembly a substantial distance proximally from said intruder in response to a maximum penetration.