Pneumatic cylinder plug

Abstract

A pneumatic cylinder plug has an annular body, an axial through hole, an inside flange, an outside flange, an air port, an inner bushing and an air gap. The through hole is defined through the annular body. The air port is formed radially through the annular body and the inside flange from the axial through hole to the outside surface of the annular body. The inner bushing is formed inside the inner flange and has an inner diameter. The pneumatic cylinder plug is used with a closed pneumatic device to further support a piston rod in the closed pneumatic device.

1 . A pneumatic cylinder plug comprising: 
 an annular body having an inside end, an outside end and an outside surface;    an axial through hole defined through the annular body;    an inside flange formed on and extending longitudinally from the inside end of the annular body and having an inside end; and    multiple inside notches defined on the inside end of the inside flange;    an outside flange formed on and extending longitudinally from the outside end of the annular body;    at least one air port formed radially through the annular body and the inside flange from the axial through hole to the outside surface of the annular body and having a bottom port surface; and    an inner bushing formed inside the inner flange and having an inner diameter.    
   
   
       2 . The pneumatic cylinder plug as claimed in  claim 1  further having an air gap defined inside the air port between the bottom port surface and the inner bushing and allowing the air port to communicate with the axial through hole in the annular body.  
   
   
       3 . A central position seat comprising: 
 an annular body having an inside end, an outside end and an outside surface;    an axial through hole defined through the annular body;    an inside flange formed on and extending longitudinally from the inside end of the annular body and having an inside end; and    multiple inside notches defined on the inside end of the inside flange;    an outside flange formed on and extending longitudinally from the outside end of the annular body;    at least one air port formed radially through the annular body and the inside flange from the axial through hole to the outside surface of the annular body and having a bottom port surface; and    an inner bushing formed inside the inner flange and having an inner diameter.    
   
   
       4 . The central position seat as claimed in  claim 3  further having an air gap defined inside the air port between the bottom port surface and the inner bushing and allowing the air port to communicate with the axial through hole in the annular body.