Puller

A puller for removing an object from a shaft, comprising:

• first and second collars;
• a hydraulic cylinder secured to the first collar and including a reciprocable piston fixed to said second collar;
• means for hydraulically controlling said cylinder to selectively position said collars relative to one another;
• at least two circumferentially spaced clamping jaws pivotally supported at one end to said first collar and having means at the other end for grasping the object;
• at least two circumferentially spaced links, each of said links being pivotally supported at one end to said second collar and pivotally supported at the other end to an associated clamping jaw;
• and
• means for moving said second collar along said axis away from the shaft.

A puller for removing an object from a shaft, comprising:

• first and second collars;
• a first cylinder secured to the first collar and including a first piston fixed to said second collar and reciprocable along an axis;
• means for controlling said first cylinder and first piston for selective positioning of said first collar relative to said second collar, said controlling means further allowing limited movement of the first piston relative to the first cylinder when the first and second collars are in a selected position;
• at least two circumferentially spaced clamping jaws pivotally supported at one end to said first collar and having means at the other end for grasping the object;
• at least two circumferentially spaced links, each of said links being pivotally supported at one end to said second collar and pivotally supported at the other end to an associated clamping jaw;
• a second cylinder secured to said second collar and including a second piston reciprocable in said second cylinder along said axis;
• a pusher fixed to said second piston;
• and
• means for selectively driving said second piston in said second cylinder to move said pusher against said shaft end to move said second collar away from said shaft.