| 主权项 |
1. A manually-operated tool (1) comprising,
first and second mobile jaws (2, 3) which are reciprocally hinged by a cross pin (7) to form a compass-opening beak (4); and first and second control handles (5, 6) which are reciprocally hinged to be compass-moveable in relation to one another, and are each connected to a respective jaw (2, 3) to allow a user to open and close the beak (4) moving the two handles (5, 6); a proximal end of the first handle (5) being rigidly integral to a first jaw (2); a proximal end of the second handle (6) being mechanically connected to the second jaw (3) by an epicyclic gear train (8), which is arranged coaxial to said cross pin (7), inside a cavity (9) formed in a body of the second jaw (3); the epicyclic gear train (8) comprising,
a central pinion (13), which extends inside the cavity (9) in the second jaw (3) substantially coaxial to the cross pin (7) and is angularly integral with the second handle (6), anda rotatable planet-carrier assembly (16), which is fitted in axially rotatable manner on the central pinion (13), inside the cavity (9) in the second jaw (3) and is disposed to freely rotate around an axis (R) of the cross pin (7) independently of the central pinion (13); and at least one automatic locking device (20), which is located inside the cavity (9) in the second jaw (3), directly facing one of two heads (17) of the planet-carrier assembly (16), and is structured to selectively lock/connect the planet-carrier assembly (16) in rigid manner to a body of the first jaw (2) when the two handles (5, 6) are closed/neared together to tighten/close the two jaws (2, 3) against each other. |
