Device for closing a pot-like digestion vessel

Abstract

A pot-like digestion vessel ( 1 ), which is closed by a cover ( 3 ), is provided with adjustable automatic internal pressure relief by means of a pressure applying plunger ( 6 ) which is held in a screwing part ( 7 ) via a resilient pressure generating mans ( 8 ) to press against the cover ( 3 ). In another embodiment the plunger ( 6 ) holds a valve body ( 33 ) in an outlet channel ( 31 ) which extends through the cover ( 3 ).

1 . A device for closing a pot-like digestion vessel having an opening which is covered by a cover, said device comprising 
 a pressure applying plunger;    a screwing part arranged coaxially with said pressure applying plunger; and    a resilient pressure generating means arranged between the pressure applying plunger and the screwing part,    said screwing part and said pressure-applying plunger being configured such that one fits around the other in a socketed arrangement.    
     
     
         2 . A device according to  claim 1 , wherein an annular wall fits around said pressure-applying plunger and is integrally connected to said screwing part to extend from said screwing part.  
     
     
         3 . A device according to  claim 2 , wherein an annular seal is arranged between said annular wall and said pressure-applying plunger.  
     
     
         4 . A device according to  claim 3 , wherein said annular seal is formed by a sealing ring of resilient material which is mounted in an annular groove in the inner circumferential surface of said annular wall or in an outer circumferential surface of said pressure-applying plunger.  
     
     
         5 . A device according to  claim 1 , wherein 
 said screwing part has an external thread.    
     
     
         6 . A device according to  claim 5 , wherein 
 said screwing part is screwable into an abutment which is supported at a location such that a digestion vessel is disposed below said screwing part and said pressure-applying plunger, said abutment being formed by an upper wall of a box-like housing for containing a digestion vessel.    
     
     
         7 . A device for closing a pot-like digestion vessel having an opening which is covered by a cover, said device comprising: 
 a pressure-applying plunger;    an abutment arranged to surround a digestion vessel; and    a screwing part which fits around said pressure-applying plunger in the manner of a cap and which includes a lower edge portion formed with a screw-thread and arranged such said lower edge portion can be screwed to said abutment,    said abutment being formed by a supporting ring which can be fixed to a digestion vessel at its circumference.    
     
     
         8 . A device according to  claim 7 , and further including: 
 a digestion vessel having a flange at an edge thereof;    said supporting ring being fastened to an outer circumferential surface of said digestion vessel and/or fits under the flange and/or is formed on the flange.    
     
     
         9 . A device according to  claim 1 , wherein 
 said pressure-applying plunger is axially guided by a cylindrical sliding face of an internal hollow cylinder, which is formed in said screwing part, to move slidingly along said face.    
     
     
         10 . A device according to  claim 9 , wherein 
 at least one annular groove is formed in said cylindrical sliding face of said pressure-applying plunger.    
     
     
         11 . A device according to  claim 1 , wherein 
 said pressure-applying plunger has a U-shaped cross-sectional shape and wherein 
 said resilient pressure-generating means is arranged in a recess created by said U-shaped cross-sectional shape.  
   
     
     
         12 . A device according to clam  1 , wherein 
 said resilient pressure-generating means is formed by at least one of a disc spring and a helical spring.    
     
     
         13 . A device according to  claim 1 , wherein 
 a coaxial hole is formed in said pressure-applying plunger    
     
     
         14 . A device according to  claim 1 , wherein 
 said screwing part includes in an upper region thereof, a guidance section which guides an extension of said pressure-applying plunger.    
     
     
         15 . A device according to  claim 1 , wherein 
 said screwing part is provided at its upper end with an element for applying rotation thereto.    
     
     
         16 . A device according to  claim 1 , wherein 
 said pressure-applying plunger forms a cover of a digestion vessel.    
     
     
         17 . A device according to  claim 1 , wherein 
 a position-indicating marking, is arranged between said screwing part and said abutment.    
     
     
         18 . A device for closing a pot-like digestion vessel, said device comprising: 
 a cover which closes an opening in such digestion vessel; said cover being formed with an outlet channel extending therethrough    a closing part which bears against said cover to hold said cover over an opening of a digestion vessel;    a closing part which bears against said cover; and    a valve which closes said outlet channel, said valve being arranged to open automatically in response to an internal pressure in such digestion vessel exceeding a given value.    
     
     
         19 . A device according to  claim 18 , wherein 
 said outlet channel is disposed axially of said cover, and wherein 
 said valve includes a valve body which is larger than said outlet channel, said valve body being preloaded by means of a spring against an edge of said outlet channel.  
   
     
     
         20 . A device according to  claim 19 , wherein 
 said edge of said outlet channel is formed by the step surface of a widened portion of said outlet channel.    
     
     
         21 . A device according to  claim 20 , wherein 
 a section of said outlet channel branches off inside said cover above said step surface.    
     
     
         22 . A device according  claim 19 , wherein 
 said closing part is a screwing part which is screwed into an abutment and which is also arranged to be screwed against said cover.    
     
     
         23 . A device according to  claim 22 , wherein 
 said screwing part forms a guide for said valve body.    
     
     
         24 . A device according to  claim 23 , wherein 
 said screwing part is a sleeve into which said valve body extends.    
     
     
         25 . A device according to  claim 24 , wherein 
 said spring is arranged in said sleeve.    
     
     
         26 . A device according to  claim 24  or  25 , and further including 
 a stop arranged to limit outward extension movement of said valve body, said stop being arranged at a lower edge of said sleeve, said stop being formed by a flange which is detachably fixed to said lower edge.  
 
     
     
         27 . A device according to  claim 19  wherein 
 said valve body is detachably connected to a valve body base by means of a screw connection.  
 
     
     
         28 . A device according to  claim 19 , and further including 
 a valve body spigot arranged to fit into said outlet channel with a small clearance for movement, said valve body projecting downwardly from said valve body.