Patent ID: 8066289

Claim:
A rapid clamping system comprising: means defining a clamping receptacle; a clamping pin disposed in said clamping receptacle; a piston, structured and disposed for pressurizing at a first side thereof; a spring member for loading a second side of said piston; an actuator disposed on said piston to follow a piston motion; and at least one clamping bolt disposed for displaceable guidance and motional coupling to said actuator in two directions of motion via an inclined guide defined by said clamping bolt, said inclined guide having an irregular guide contour with differing angles of inclination relative to a piston axis to obtain differing transmission ratios, wherein, when said spring member is extended, said clamping bolt assumes a locking position for locking said clamping pin and when said piston is loaded with an appropriate pressure, said clamping bolt assumes an unlocking position for removing said clamping pin, said guide contour having two opposite crank sections, with said actuator running along a first crank section when said clamping bolt is moved in one direction and running along a second crank section when said clamping bolt is moved in an other direction, wherein said two crank sections have different designs and are not parallel to each other.