Venting lid with safety seal

Abstract

A lid is disclosed for use with a bulk container having an access opening. The lid comprises a top wall and a circular opening through the top wall, defining a bung opening. A cylindrical collar extends downwardly from the top wall surrounding the circular opening. The cylindrical collar has a threaded inner wall. A removable vented closure is threadably received in the cylindrical collar to selectively close the bung opening. A safety seal is secured to the top wall. The safety seal comprises a ring secure to the wall surrounding the circular opening, a vented cap inwardly of the ring operably covering the removable vented closure, and a frangible connector operatively connecting the cap to the ring.

1 . A lid for use with a bulk container having an access opening, the lid comprising: 
 a top wall;    a circular opening through the top wall, defining a bung opening;    a cylindrical collar extending downward from the top wall surrounding the circular opening, the cylindrical collar having a threaded inner wall;    a removable vented closure threadably received in the cylindrical collar to selectively close the bung opening; and    a safety seal secured to the top wall, the safety seal comprising a ring secured to the top wall surrounding the circular opening, a vented cap inwardly of the ring operatively covering the removable vented closure, and a frangible connector operatively connecting the cap to the ring.    
   
   
       2 . The lid of  claim 1  wherein the safety seal is of one piece plastic construction.  
   
   
       3 . The lid of  claim 1  wherein the safety seal is of one piece polypropylene construction.  
   
   
       4 . The lid of  claim 1  wherein the safety seal ring is welded to the top wall.  
   
   
       5 . The lid of  claim 1  wherein the vented cap comprises a planar circular wall surrounded by a cylindrical side wall having a peripheral flange, the side wall including plural vent openings.  
   
   
       6 . The lid of  claim 5  wherein the frangible connector comprises an annular connector connected between the ring and the flange.  
   
   
       7 . The lid of  claim 6  wherein the annular connector has a first end fixedly connected to the flange and a second end connected to a tab extending radially outwardly of the ring, whereby a user can grasp the tab to break the frangible connection between the cap and the ring.  
   
   
       8 . A lid for use with a portable tank or intermediate bulk container, or the like, having a threaded collar defining a port opening, the lid comprising: 
 a generally circular top wall;    a generally cylindrical sidewall connected to said top wall and having an inner threaded surface for threading to a threaded collar to close the port opening, in use;    a circular opening through the top wall, defining a bung opening;    a cylindrical collar extending downward from the top wall surrounding the circular opening, the cylindrical collar having a threaded inner wall;    a removable vented closure threadably received in the cylindrical collar to selectively close the bung opening; and    a safety seal secured to the top wall, the safety seal comprising a ring secured to the top wall surrounding the circular opening, a vented cap inwardly of the ring operatively covering the removable vented closure, and a frangible connector operatively connecting the cap to the ring.    
   
   
       9 . The lid of  claim 8  wherein the safety seal is of one piece plastic construction.  
   
   
       10 . The lid of  claim 8  wherein the safety seal is of one piece polypropylene construction.  
   
   
       11 . The lid of  claim 8  wherein the safety seal ring is welded to the top wall.  
   
   
       12 . The lid of  claim 8  wherein the vented cap comprises a planar circular wall surrounded by a cylindrical side wall having a peripheral flange, the side wall including plural vent openings.  
   
   
       13 . The lid of  claim 12  wherein the frangible connector comprises an annular connector connected between the ring and the flange.  
   
   
       14 . The lid of  claim 13  wherein the annular connector has a first end fixedly connected to the flange and a second end connected to a tab extending radially outwardly of the ring, whereby a user can grasp the tab to break the frangible connection between the cap and the ring.  
   
   
       15 . A lid for use with a portable tank or intermediate bulk container, or the like, having a collar defining a port opening, the lid comprising: 
 a top wall;    a sidewall connected to said top wall for closing the port opening, in use;    a circular opening through the top wall, defining a bung opening;    a removable closure threadably received in the cylindrical collar to selectively close the bung opening; and    a safety seal secured to the top wall, the safety seal comprising a band secured to the top wall surrounding the circular opening, a cap inwardly of the band operatively covering the removable closure, and a frangible connector operatively connecting the cap to the band.    
   
   
       16 . The lid of  claim 15  wherein the safety seal band is welded to the top wall.  
   
   
       17 . The lid of  claim 15  wherein the cap comprises a planar circular wall surrounded by a cylindrical side wall having a peripheral flange.  
   
   
       18 . The lid of  claim 17  wherein the band is in the form of a ring and the frangible connector comprises an annular connector connected between the band and the flange.  
   
   
       19 . The lid of  claim 18  wherein the annular connector has a first end fixedly connected to the flange and a second end connected to a tab extending radially outwardly of the band, whereby a user can grasp the tab to break the frangible connection between the cap and the band.