To prevent fluid collected at a contaminated needle from being splattered to the environment when the housing of a needle protection device is pivoted to enclose the needle, a bias member is provided in the needle protective housing to provide damping for the needle as the needle is moved within the...http://www.google.com/patents/US20040078007?utm_source=gb-gplus-sharePatent US20040078007 - Needle protection device with dampener
