Single-chamber self-locking cylinder

Abstract

A single-chamber self-locking cylinder is described in which the single-chamber is made up of a male half-cylinder and a female half-cylinder that are inserted one into the other in mutually sliding way in axial direction. Two pairs of diametral rods that are angularly offset from each other are provided that operate on said half-cylinders in order to retain them in a predetermined axially centred position under the action of a fluid in pressure that is fed inside said single-chamber. Each one of said pairs of diametral rods is made up of two rods operating onto opposite faces of said half-cylinders and coupled to each other by axial tie rods. One of the two rods is fastened to a stem coupled in axially sliding way to one of the two half-cylinders while the other one is slidingly coupled to another stem that is coupled in axially sliding way to the other one of the two half-cylinders.

1 . A single-chamber cylinder self-locking in a centered position, comprising: 
 a single-chamber made up of a male half-cylinder and a female half-cylinder axially slidable with respect to one another;    two pairs of diametral rods angularly offset from each other associated with said half-cylinders in order to keep them axially in said centered position when a pressurized fluid is fed inside said single-chamber; and    each one of said pairs of diametral rods made up of two rods operating on opposite faces of said half-cylinders and coupled to each other by axial tie rods, wherein    one of the rods of each pair is fastened to a stem coupled in axially sliding manner to one of the two half-cylinders whereas the other rod of the same pair is slidingly coupled to another stem that is in turn slidingly coupled to the other one of the two half-cylinders.    
     
     
         2 . The single-chamber cylinder according to  claim 1 , wherein said pairs of rods are angularly offset with respect to one another.  
     
     
         3 . The single-chamber cylinder according to  claim 1 , wherein the fastening of the rods of each pair to said stems is obtained by means of nuts and bushings, where the bushings serve as a guide for the axial sliding of the other rods of the same pair and of the two half-cylinders as regards said stems.  
     
     
         4 . The single-chamber cylinder according to  claim 2 , wherein the fastening of the rods of each pair to said stems is obtained by means of nuts and bushings, where the bushings serve as a guide for the axial sliding of the other rods of the same pair and of the two half-cylinders as regards said stems.  
     
     
         5 . The single-chamber cylinder according to  claim 1 , wherein said stems are provided with respective spherical end joints.  
     
     
         6 . The single-chamber cylinder according to  claim 2 , wherein said stems are provided with respective spherical end joints.  
     
     
         7 . The single-chamber cylinder according to  claim 3 , wherein said stems are provided with respective spherical end joints.  
     
     
         8 . The single-chamber cylinder according to  claim 4 , wherein said stems are provided with respective spherical end joints.