Patent ID: 7153275
Filing Date: 2006-12-26
Classification: A61B

Abstract:
1. A device for taking samples from a body, said device comprising: a needle whose distal end forms a recess able to receive said sample; a cannula coaxially surrounding said needle, said needle and cannula being able to slide relative to one another; a first slide and a second slide connected respectively to said needle and cannula; a first spring and a second spring connected respectively to said first and second slides; a grippable housing of elongate shape, defining an inner seat inside which are arranged in series, on a longitudinal axis of said housing, said slides which are able to slide between a forward position in the housing, for which said needle and cannula are in a rest position and ready to be primed for taking a sample, and a rearward position for which said needle and cannula are in a primed, retracted position ready for said sampling; a control button for bringing said slides to the rearward position counter to said respective springs; a blocking device that blocks said slides in the rearward position; and a trigger mechanism for canceling said blocking device and, under the action of said springs, causing the forward displacement of said slides and firing of said needle and cannula, said trigger mechanism comprising, on said housing, a front tumbler and a rear tumbler, wherein: said first and second slides comprise limit stops which are transversely offset with respect to one another, and said control button comprises a lug which can be moved transversely under the action of a displacement device and acts sequentially on said offset limit stops in order to bring said slides one after the other to the rearward position to provide sequential charging of the needle and cannula, said displacement device comprises a spring arranged transversely between said button and said lug and permitting the latter to pass from a retracted position, for which one of said slides is displaced to the rearward position via its limit stop, to a deployed position for which the other of said slides is displaced to the rearward position via its offset limit stop, and an inclined ramp which is provided inside said housing and which returns said lug from its deployed position to its retracted position, upon return of said button to the initial position, said second slide with cannula and its spring are situated at the front of said housing and are brought first to the rearward, primed position via said lug, while said first slide with needle and its spring are situated coaxially at the front of said housing and are displaced secondly to the rearward, primed position, the displacement of said slides and springs being limited by brackets fixed to said housing, and both the charged needle and cannula are automatically fired upon the actuation of either one of the front and rear tumblers.