Patent ID: 6742440
Filing Date: 2004-06-01
Classification: F15B,G01N

Abstract:
Apparatus for providing a controlled mechanical stop that halts further movement of a first hydraulic piston, the apparatus comprising:the first hydraulic piston controllably moveable in a first piston cylinder, the first piston having a piston shaft attached to the first piston and extending outwardly therefrom; a second hydraulic piston controllably positionable in a second piston cylinder to a desired stopping position therein, said second cylinder being separate from the first piston cylinder and said second piston producing greater force than the first piston; the shaft extending longitudinally through a bore in second piston such that shaft can slidably move through the second piston; and a stopping element situated on the shaft such that during movement of the first piston and the shaft in a predefined direction, the stopping element will abuttingly engage with the second piston at the stopping position such the second piston will over-power and stop further movement of the shaft and the first piston in the predefined direction.