Device for automatic shock-absorbed closing of drawers and pull-out furniture elements

Abstract

The present invention refers to a device for automatic shock-absorbed closing of drawers and pull-out furniture elements in general, which comprises a hydraulic cylinder with a piston used to pour oil from one chamber to the other one and a return spring inserted into the piston stem, whose end is provided with means used to fasten and unfasten the stem automatically to and from a special bracket suitably fitted to the pull-out element.

1 . Device for automatic shock-absorbed closing of pull-out furniture elements, characterised by the fact that it comprises: 
 a hydraulic cylinder ( 1 ) supported by a support ( 2 ) provided with brackets ( 2   a ) for stable anchoring to a fixed part of the cabinet and frontally ending with two rectilinear appendixes ( 2   b ) that form a sort of fork, with flat parallel forks with a long slot ( 3 ) with basically upturned U shaped design, which houses a sliding pin ( 4 ) with horizontal axis that connects a parallel pair of identical oscillating plates ( 5 ) inserted into the same pivoting pin ( 6 ) applied at the end of the section ( 7   a ,  70   a ) of the stem ( 7 ,  70 ) of the cylinder ( 1 ), whose internal piston ( 8 ) has a first series of spaces ( 9 ) to pour oil form a chamber to the other one and an additional series of through holes ( 10 ) closed on one side by a small plate ( 11 ) constantly subjected to the action of a return spring ( 12 ) that prevents the oil from seeping through the holes ( 10 ) during the retraction of the stem ( 7 ,  70 ) that coincides with the ending part of the closing travel of pull-out element, it being provided that a helicoidal cylindrical spring ( 13 ) is externally inserted into the stem ( 7 ,  70 ) of the piston ( 8 ).    a bracket (S) fitted to the pull-out element and provided with a deep hook-like notch (P) that receives the pin ( 4 ) and cooperates with it as a cam.    
   
   
       2 . Device as defined in the preceding claim characterised by the fact that the chamber ( 1   a ) of the cylinder ( 1 ) where oil is poured during the opening travel of the pull-out element is slightly conical, so that the distance between the external walls of the piston ( 8 ) and the internal walls of the chamber ( 1   a ) gradually reduces as the piston ( 8 ) moves backwards with the pull-out element.  
   
   
       3 . Device as defined in  claim 2 , characterised by the fact that the stem ( 7 ) does not go through the piston ( 8 ) and the spring ( 13 ) is situated inside the chamber ( 1   b ) of the cylinder ( 1 ) where oil is poured during the closing travel of the pull-out element, it being provided that a compensation disk ( 14 ) situated near the bottom of the other chamber ( 1   a ) with the possibility of making short alternate travels inside the cylinder ( 1 ), being constantly subjected to the pressure of a spring ( 15 ) that pushes it towards the piston ( 8 ).  
   
   
       4 . Device as defined in  claim 1 , characterised by the fact that the stem ( 70 ) goes through the piston ( 8 ) and comes out beyond the back bottom of the cylinder ( 1 ) and the spring ( 13 ) is inserted into the section ( 70   b ) of the stem ( 70 ) that comes out from the back bottom and terminates with a threaded section ( 70   c ), where a cup ( 70   d ) is screwed to compress the spring ( 13 ) during the forward travel of the stem ( 70 ) together with the pull-out element during opening.  
   
   
       5 . Device as defined in  claim 1 , characterised by the fact that the cylinder ( 1 ) is supported and enclosed inside a opposite pair of identical semi-shells ( 2 ) provided at one end with brackets ( 2   a ) for stable anchoring inside the body of the cabinet.  
   
   
       6 . Device as defined in  claim 1 , characterised by the fact that 
 the bracket (S) has a sloping shape (P 1 ) joined with the opening of the hook-like notch (P), and    the oscillating plates ( 5 ) have a back lock pin ( 5   a ).    
   
   
       7 . Device as defined in  claim 1 , characterised by the fact that the first series of spaces ( 9 ) consists in longitudinal grooves along the external edge of the piston ( 8 ).