A lancet injector is provided which has a tubular housing, a slidable lancet holder in the housing, a compression spring connected between the holder and one end of the housing, and a holder control member extending through a longitudinal slot in the sidewall of the housing. The control member is operable...http://www.google.de/patents/US4503856?utm_source=gb-gplus-sharePatent US4503856 - Lancet injector
