Device for limiting the upper rotation speed of a balancing hoist

A balancing hoist, comprising:

• a housing having a chamber accessible from outside;
• a piston movable by gas pressure in the housing in a longitudinal direction;
• a threaded spindle caused to rotate as the piston moves in the longitudinal direction, said spindle carrying a nut which is securely fixed to the housing;
• a cable drum mounted in fixed rotative engagement to the spindle and movable longitudinally along the spindle;
• at least one pawl configured for rotation in opposition to an elastic restraining force between a radially inward idle position and a radially outward brake position about a pivot pin, which extends in parallel relationship to the spindle, said pawl pointing in rotation direction at rotating cable drum and pivoting into the brake position as a result of centrifugal forces, when a rotation speed of the cable drum exceeds a predetermined level which is dependent on the magnitude of the restraining force;
• and
• at least one fixed stopper projecting radially inwardly from the housing at a level with the brake position for interaction with the pawl, when the pawl is in the brake position, for braking the rotation of the cable drum until its standstill,
• wherein the spindle has one end projecting into the chamber of the housing for connection to the pivot pin.