Patent ID: 7322190
Filing Date: 2008-01-29
Classification: F15B

Abstract:
1. An apparatus for non-binding, non-skewed movement of an object while maintaining squareness to an original position, comprising: the object being movable between two locations; at least two cylinder assemblies adapted to be connected to the object for extending and retracting the object; a synchronizer having at least two isolated chambers corresponding to the at least two cylinder assemblies, a rod extending axially through the chambers, and pistons mounted on the rod with one of said pistons being located in each of the isolated chambers, the chambers including first and second passageways extending into opposite ends of each of the chambers; an axial passageway extending continuously through the rod and connected to the first passageways for communicating hydraulic fluid to each first passageway; a hydraulic pump; and a hydraulic circuit operably connecting the pump to the axial passageway of the synchronizer and to the second passageways of the synchronizer and to the at least two cylinder assemblies for controlling and providing synchronized movement of the at least two cylinder assemblies.