Crimping tool

Pliers for pressing or crimping a workpiece, the pliers comprising:

• a) two pliers jaws,
• b) two hand levers,
• c) a driving mechanism which drivingly couples the hand levers to the pliers jaws such that it is possible to induce a working stroke from an open position of the pliers jaws into a closed position of the pliers jaws by a manually induced relative movement of the hand levers, the working stroke comprising:
• ca) an equilibrium position between the open position and the closed position of the pliers jaws,
• cb) a first working stroke part located between the open position and the equilibrium position of the pliers jaws configured to clamp the workpiece between the pliers jaws and
• cc) a second working stroke part located between the equilibrium position and the closed position of the pliers jaws configured to press or crimp the workpiece clamped between the pliers jaws,
• d) a spring device positioned on the driving mechanism which biases the pliers jaws toward and away from each other and which
• da) in the equilibrium position does not apply a net force to the pliers jaws,
• db) in the first working stroke part applies a closing force to the pliers jaws to bring the pliers jaws into the equilibrium position without manual application of force to the two hand levers and
• dc) in a second working stroke part applies an opening force to the pliers jaws such that when the second working stroke part is completed and the hand levers are released the pliers jaws return to the equilibrium position.