Container closure system

Abstract

A container closure system providing a lid assembly and an annular locking assembly adapted to be positioned in a locking engagement along a periphery of a container opening is provided. The lid assembly has a center portion circumscribed by a lid rim, wherein the lid rim defines a downward-facing retaining space for enveloping a flange portion of the periphery of the container opening. The annular locking assembly provides a retaining wall having a retaining edge dimensioned and adapted to be received into the retaining space so as to sandwich the flange portion within the retaining space, forming a secure seal to prevent spillage of the container's contents or accidental removal of lid, or undesired removal of lid by a child. The center portion may form a content aperture for dispensing or receiving said contents.

What is claimed is: 
     
         1 . A container closure system comprising:
 a lid assembly having a lid rim circumscribing a center portion, wherein the lid rim is defined by three joined portions, forming a retaining space; and   an annular locking assembly having a retaining wall circumscribe a container base opening, wherein the retaining wall terminates at a retaining edge, and wherein the retaining wall is dimensioned and adapted to mate, retaining-edge first, with the retaining space so as to be positioned in a locking engagement.   
     
     
         2 . The container closure system of  claim 1 , wherein the three joined portions comprise an exterior portion, an interior portion and a top portion, wherein the three portions define a cut-off right-triangular shaped retaining space. 
     
     
         3 . The container closure system of  claim 2 , further comprising:
 a first threading along the retaining space; and   a cooperating threading along a portion of the retaining wall, wherein the threading and the cooperating threading mate when the retaining space is positioned in the locking engagement by rotating the lid assembly relative to the locking assembly.   
     
     
         4 . The container closure system of  claim 3 , wherein the first threading is disposed along the exterior portion of the lid rim, and wherein the cooperating threading is disposed along an outer portion of the retaining wall. 
     
     
         5 . The container closure system of  claim 4 , further comprising a plurality of gripping facets disposed along a periphery of a portion of the retaining wall. 
     
     
         6 . The container closure system of  claim 5 , further comprising a container forming a container opening, wherein a flange portion is disposed along a periphery of the container opening, and wherein the flange portion is sandwiched between the retaining edge and the retaining space positioned in the locking engagement. 
     
     
         7 . The container closure system of  claim 6 , further comprising a content aperture formed by the center portion. 
     
     
         8 . The container closure system of  claim 2 , further comprising:
 a plurality of spaced-apart recess slots disposed along the lid rim; and   a plurality of complementary protruding clips disposed along the retaining wall so as to mate with the recess slots when the retaining space is positioned in the locking engagement by urging the retaining wall into the retaining space.   
     
     
         9 . The container closure system of  claim 8 , wherein the plurality of recess slots are disposed along the exterior portion of the lid rim, and wherein the plurality of complementary protruding clips are disposed along an outer portion of the retaining wall. 
     
     
         10 . The container closure system of  claim 9 , further comprising a container forming a container opening, wherein a flange portion is disposed along a periphery of the container opening, and wherein the flange portion is sandwiched between the retaining edge and the retaining space positioned in the locking engagement. 
     
     
         11 . The container closure system of  claim 10 , further comprising a content aperture formed by the center portion.