Back-off resistant closure system

Abstract

A resealable anti back-off closure system that is substantially leak-proof and back-off resistant. A closure and container include mating screw threads. The closure includes recesses formed within the interior surface of the closure adapted to cooperate with protrusions formed on the neck of the container. The protrusions and recesses releasably lock together when the closure is screwed onto the container. The closure and container form at least two seals when coupled, including a flange seal and a land seal.

What is claimed is: 
     
         1 . A closure system assembly for a container comprising:
 a closure defining an interior surface defining a first screw thread;   a container defining a finished neck defining a second screw thread, the second screw thread for mating with the first screw thread;   a closure lock comprising at least one recess adapted to cooperate with at least one protrusion, one of the at least one recess and the at least one protrusion formed within the interior surface of the closure, the other one of the at least one recess and the at least one protrusion formed into the neck of the container, whereby the at least one protrusion and at least one recess releasably and recloseably lock together when the closure is screwed fully onto the container;   a flange seal comprising a flange extending from an interior surface of the closure and contacting an interior surface of the container neck such that the interior surface of the neck and the flange form a liquid-tight seal; and   a land seal comprising a first land area defined by an interior surface of the closure and contacting a second land area defined at the top of the neck of the container such that the first land area and the second land area form a liquid-tight seal.   
     
     
         2 . The closure system of  claim 1 , wherein one of the at least one recess and at least one protrusion formed within the interior surface of the closure extends downward to the bottom edge of the closure. 
     
     
         3 . The closure system of  claim 1 , wherein at least one protrusion formed into the neck of the container extends radially outward from the neck of the container. 
     
     
         4 . The closure system of  claim 1 , wherein at least one protrusion formed within the interior surface of the closure extends radially inward from the closure. 
     
     
         5 . The closure system of  claim 1 , wherein a plurality of recesses are formed within the interior surface of the closure and extend around the entire periphery of the closure. 
     
     
         6 . The closure system of  claim 1 , wherein a plurality of recesses are formed into the neck of the container and extend around the entire periphery of the container. 
     
     
         7 . A closure system assembly for a container comprising:
 a closure defining an interior surface defining a first screw thread;   a container defining a finished neck defining a second screw thread, the second screw thread for mating with the first screw thread;   a closure lock comprising at least one recess adapted to cooperate with at least one protrusion, one of the at least one recess and the at least one protrusion formed within the interior surface of the closure, the other one of the at least one recess and the at least on protrusion formed into the neck of the container, whereby the at least one protrusion and at least one recess releasably and recloseably lock together when the closure is screwed fully onto the container; and   a flange seal comprising a flange extending from an interior surface of the closure and contacting an interior surface of the container neck such that the interior surface of the neck and the flange form a liquid-tight seal   
     
     
         8 . The closure system of  claim 7 , further comprising a land seal comprising a first land area defined by an interior surface of the closure and contacting a second land area defined at the top of the neck of the container such that the first land area and the second land area form a liquid-tight seal. 
     
     
         9 . The closure system of  claim 7 , wherein one of the at least one recess and at least one protrusion formed within the interior surface of the closure extends downward to the bottom edge of the closure. 
     
     
         10 . The closure system of  claim 7 , wherein at least one protrusion formed into the neck of the container extends radially outward from the neck of the container. 
     
     
         11 . The closure system of  claim 7 , wherein at least one protrusion formed within the interior surface of the closure extends radially inward from the closure. 
     
     
         12 . The closure system of  claim 7 , wherein a plurality of recesses are formed within the interior surface of the closure and extend around the entire periphery of the closure. 
     
     
         13 . The closure system of  claim 7 , wherein a plurality of recesses are formed into the neck of the container and extend around the entire periphery of the container. 
     
     
         14 . A closure system assembly for a container comprising:
 a closure defining an interior surface defining a first screw thread;   a container defining a finished neck defining a second screw thread, the second screw thread for mating with the first screw thread;   a closure lock comprising at least one recess adapted to cooperate with at least one protrusion, one of the at least one recess and the at least one protrusion formed within the interior surface of the closure, the other one of the at least one recess and the at least on protrusion formed into the neck of the container, whereby the at least one protrusion and at least one recess releasably and recloseably lock together when the closure is screwed fully onto the container; and   a land seal comprising a first land area defined by an interior surface of the closure and contacting a second land area defined at the top of the neck of the container such that the first land area and the second land area form a liquid-tight seal.   
     
     
         15 . The closure system of  claim 14 , further comprising a flange seal comprising a flange extending from an interior surface of the closure and contacting an interior surface of the container neck such that the interior surface of the neck and the flange form a liquid-tight seal. 
     
     
         16 . The closure system of  claim 14 , wherein one of the at least one recess and at least one protrusion formed within the interior surface of the closure extends downward to the bottom edge of the closure. 
     
     
         17 . The closure system of  claim 14 , wherein at least one protrusion formed into the neck of the container extends radially outward from the neck of the container. 
     
     
         18 . The closure system of  claim 14 , wherein at least one protrusion formed within the interior surface of the closure extends radially inward from the closure. 
     
     
         19 . The closure system of  claim 14 , wherein a plurality of recesses are formed within the interior surface of the closure and extend around the entire periphery of the closure. 
     
     
         20 . The closure system of  claim 14 , wherein a plurality of recesses are formed into the neck of the container and extend around the entire periphery of the container.