Closing lower part with a retaining rib

Abstract

The present invention relates to a closure underpart with a tubular sleeve ( 2 ) and a fixing flange ( 3 ) arranged on the outside of the tubular sleeve ( 2 ), at least one projection ( 4 ) being provided on the inside of the tubular sleeve ( 2 ), which serves to hold the closure underpart ( 1 ) on a spike inserted into the tubular sleeve ( 2 ) when fixing to a vessel wall. In order to create a corresponding closure underpart, which can be held on a spike with a much greater play it is proposed according to the invention that the at least one projection ( 4 ) has the form of a bendable web which run inclined vis-à-vis the inner wall of the tubular sleeve ( 2 ) at an angle α which is smaller than 90° and greater than 0°.

1 - 7 . (canceled).  
     
     
         8 . A closure underpart having a tubular sleeve ( 2 ) and a fixing flange ( 3 ) arranged on an outside of the tubular sleeve ( 2 ), at least one projection ( 4 ) being arranged on an inside of the tubular sleeve ( 2 ), that serves to hold the closure underpart ( 1 ) on a spike inserted into the tubular sleeve ( 2 ) when fixing the closure underpart to a vessel wall, wherein the at least one projection ( 4 ) has the form of a bendable web that runs at an inclined angle α with respect to an inner wall of the tubular sleeve ( 2 ), which angle α is smaller than 90° and greater than 0°.  
     
     
         9 . A closure underpart according to  claim 8  wherein the angle α is between 20° and 70°.  
     
     
         10 . A closure underpart according to  claim 8  wherein the angle α is about 45°.  
     
     
         11 . A closure underpart according to  claim 8  wherein the web ( 4 ) runs essentially parallel to an axis of the tubular sleeve.  
     
     
         12 . A closure underpart according to  claim 9  wherein the web ( 4 ) runs essentially parallel to an axis of the tubular sleeve.  
     
     
         13 . A closure underpart according to  claim 8  wherein at least three projections ( 4 ) are provided at equidistant angular distances on an inner surface of the tubular sleeve and adjacent to a lower inner edge of the tubular sleeve.  
     
     
         14 . A closure underpart according to  claim 9  wherein at least three projections ( 4 ) are provided at equidistant angular distances on an inner surface of the tubular sleeve and adjacent to a lower inner edge of the tubular sleeve.  
     
     
         15 . A closure underpart according to  claim 10  wherein at least three projections ( 4 ) are provided at equidistant angular distances on an inner surface of the tubular sleeve and adjacent to a lower inner edge of the tubular sleeve.  
     
     
         16 . A closure underpart according to  claim 8  wherein the webs have a height, measured in a plane perpendicular to an axis of the closure underpart and at an angle α to the tubular wall, of 0.5 to 1.5 mm.  
     
     
         17 . A closure underpart according to  claim 9  wherein the webs have a height, measured in a plane perpendicular to an axis of the closure underpart and at an angle α to the tubular wall, of 0.5 to 1.5 mm.  
     
     
         18 . A closure underpart according to  claim 10  wherein the webs have a height, measured in a plane perpendicular to an axis of the closure underpart and at an angle α to the tubular wall, of 0.5 to 1.5 mm.  
     
     
         19 . A closure underpart according to  claim 8  wherein the webs ( 4 ) are inclined relative to an axis of the sleeve ( 2 ).  
     
     
         20 . A closure underpart according to  claim 9  wherein the webs ( 4 ) are inclined relative to an axis of the sleeve ( 2 ).  
     
     
         21 . A closure underpart according to  claim 10  wherein the webs ( 4 ) are inclined relative to an axis of the sleeve ( 2 ).  
     
     
         22 . A closure underpart according to  claim 14  wherein the webs ( 4 ) are inclined relative to an axis of the sleeve ( 2 ).  
     
     
         23 . A closure underpart according to  claim 8  wherein the projections consist of web sections running in a circumferential direction each of which extend over an angle range of less than 90° and run inclined relative to the closure axis.  
     
     
         24 . A closure underpart according to  claim 9  wherein the projections consist of web sections running in a circumferential direction each of which extend over an angle range of less than 90° and run inclined relative to the closure axis.  
     
     
         25 . The closure of  claim 23  wherein the angle is less than 30°.  
     
     
         26 . The closure of  claim 24  wherein the angle is less than 30°.