Described is a dose setting limiter for medical injectors of the type having a housing accommodating an ampoule-containing medicine sufficient for a number of dosed injections, a rotary dose setting knob, which is rotational relative to the housing and by which doses may be set by rotating the dose setting...http://www.google.es/patents/US6524280?utm_source=gb-gplus-sharePatente US6524280 - Dose setting limiter
