Spring device for firearm and firearm

Abstract

A spring device for firearms ( 10 ) and a firearm are disclosed. The spring device is used for returning a first weapon part ( 16 ) of the firearm ( 10 ) from a second position into a first position, from which it has been brought into the second position in relation to a further weapon part ( 11 ) under an actuating force, while loading the spring device. The spring device has at least one gas spring having a piston/cylinder arrangement ( 19 ), a cylinder ( 20 ) of the piston/cylinder arrangement ( 19 ) being attachable to one of the weapon parts ( 16; 11 ) and a piston rod ( 18 ) of the piston/cylinder arrangement ( 19 ) being attachable to the other of the weapon parts ( 11; 16 ).

What is claimed is:  
     
         1 . A spring device for firearms, for returning a first weapon part of the firearm from a second position into a first position, from which it has been brought under an actuating force into the second position in relation to a further weapon part while loading the spring device, 
 characterized in that the spring device has at least one gas spring having a piston/cylinder arrangement, a cylinder of the piston/cylinder arrangement being attachable to one of the weapon parts and a piston rod of the piston/cylinder arrangement being attachable on the other of the weapon parts.    
     
     
         2 . The spring device according to  claim 1 , 
 characterized in that the piston rod is attachable to the first weapon part, which is implemented as a moving part.    
     
     
         3 . The spring device according to  claim 1 , 
 characterized in that the gas spring is a pressure spring.    
     
     
         4 . The spring device according to one of  claims 1  to  3 , 
 characterized in that the piston rod has a high buckling stability and possibly a high warping stability.  
 
     
     
         5 . The spring device according to one of  claims 1  to  4 , 
 characterized in that the cross-section of the piston rod has a high geometrical moment of inertia for a given cross-sectional area.  
 
     
     
         6 . The spring device according to one of  claims 1  to  5 , 
 characterized in that at least one mantle layer of the piston rod is produced from a material having a high modulus of elasticity.  
 
     
     
         7 . The spring device according to one of  claims 1  to  6 , 
 characterized in that the piston rod is produced from a material combination, for example a bimetallic combination, a core being produced from a light material, for example, aluminum, and a mantle being produced from a material having a high modulus of elasticity.  
 
     
     
         8 . The spring device according to one of  claims 1  to  7 , 
 characterized in that the outer surface of the piston rod has low surface roughness and/or good corrosion resistance.  
 
     
     
         9 . The spring device according to one of  claims 1  to  8 , 
 characterized in that the cross-section of the piston rod is changeable over its length in accordance with the respective cross-sectional load, transitions between different cross-sections preferably being designed without-notching effects.  
 
     
     
         10 . The spring device according to one of  claims 1  to  9 , 
 characterized in that the piston rod is guided and/or supported transverse to its longitudinal axis by guide bodies in at least some regions, in order to prevent buckling of the piston rod.  
 
     
     
         11 . The spring device according to one of  claims 1  to  10 , 
 characterized in that the piston/cylinder arrangement ( 19 ) has a sealing and possibly guiding arrangement, having at least one sealing element, which is positioned on a piston of the piston rod or on a face of the cylinder, through which the piston rod is guided.  
 
     
     
         12 . The spring device according to one of  claims 1  to  11 , 
 characterized in that the cylinder has a connecting piece, preferably positioned in its end surface, which is implemented for supplying or removing gas to or from, respectively, the pressure chamber.  
 
     
     
         13 . The spring device according to one of  claims 1  to  12 , 
 characterized in that a regulating device is provided, through which the pressure in the pressure chamber may be kept within predetermined limiting values, in order to replace escaped gas and/or to achieve temperature compensation.  
 
     
     
         14 . A firearm having a spring device, which is implemented for the purpose of returning a first weapon part from a second position into a first position, it having been brought into the second position relative to a second weapon part while loading at least one spring element of the spring device, 
 characterized in that the spring device has a gas spring having a piston/cylinder arrangement as a spring element.    
     
     
         15 . The firearm according to  claim 14 , 
 characterized in that it has a further device, which works together with the spring device, for returning the first weapon part.