Damping assemblies for doors or the like

Claim 1

In a combination which includes a movable component whose movement must be at least partially damped, a damping assembly for at least partially damping the movement of said component, said damping assembly comprising a cylinder adapted to contain a damping fluid and having a pair of opposed end walls, a piston in said cylinder, said piston and cylinder forming a pair of members at least one of which is movable along the axis of said cylinder with respect to the other, said piston defining with said end walls a pair of interior cylinder chambers respectively situated on opposite sides of said piston, passage means operatively connected wtih said cylinder and providing communication between said chambers so that during movement of said one member along said axis with respect to the other the damping fluid can flow through said passage means between chambers, a piston rod operatively connected with said piston and extending slideably and fluid-tightly through one of said end walls, and an extension rod operatively connected to said piston and extending therefrom slideably and fluid-tightly through the other of said end walls, said extension rod having substantially the same cross section as said piston rod and said piston rod and extension rod forming a unit in which said piston rod and extension rod do not change their position relative to each other, said piston rod and extension rod respectively extending through said chambers and said extension rod rendering unnecessary any structure to compensate for the lack of a piston rod in that one of said chambers through which said extension rod passes.