An applicator (10) to deliver a liquid via a needle (20). The applicator (10) includes a shroud (44) which cooperates with a trigger (41) and trigger lock (52) so that the needle (20) is only exposed upon actuation of the trigger (41) and liquid is only injected when the shroud (44) is retracted to a...http://www.google.es/patents/US5951516?utm_source=gb-gplus-sharePatente US5951516 - Applicator
