Patent ID: 8656574

Claim:
A method of pressing a fitting onto a tube comprising: providing a hydraulic pressing device including pressing jaws, a cylinder attached to said pressing jaws, a stop, a moveable piston having a piston shank which is displaced in a displacement direction, said piston being mounted in said cylinder, and rollers connected to at least said piston shank, said rollers capable of engaging against said stop, said stop thereby limiting movement of the piston and defining a level of pressing energy, said pressing device further including a pressing chain having more than two chain links; providing a fitting and a tube onto which said fitting is mounted; and using said rollers for acting on said pressing jaws to press said fitting onto said tube, said stop interacting with said rollers, wherein the level of pressing energy applied during a pressing operation can be changed by adjustment of the stop, and wherein for certain pressing operations, the pressing is carried out during continuous ongoing piston movement.