Automatic biopsy needle device

Abstract

Abstract A biopsy needle device comprises a stem (3) slidably inserted into a cannula (4), both of them being slidably supported by a box-shaped case (5), which encloses: a first movable assembly (7), supporting the cannula (4) and subject to a first spring (8); a second movable assembly (11), supporting the stem (3) and subject to a second spring (12); charging means (29), associated to the first movable assembly (7) and to the second movable assembly (11), operable from the outside of the case (5), in order to charge the first spring (8) and the second spring (12), at an operating phase (C) wherein the movable assemblies (7, 11) are engaged with the case (5) by means of hooking means (9, 13); an unlocking element (15) of this latter at an intermediate phase (M), wherein the second spring (12) is discharged, and at a discharging phase (S), wherein the first and second spring (8, 12) are both discharged; enabling means (16), rotatably supported by the case (5), interposed between this latter and the unlocking element (15) in order to enable its axial movement when the device (1) switches in sequence between the charging phase (C), the intermediate phase (M) and the discharging phase (S).

Inventors

• 👤 Paolo Avaltroni

Bibliographic Details