Child-Resistant Large Mouth Container

Abstract

A container system ( 20 ) comprises: a container body ( 22 ) having a sidewall ( 26 ), a shoulder ( 32 ), and an externally threaded neck ( 34 ) extending from the shoulder; and a closure ( 24 ) having an internally threaded inner sidewall ( 50 ) extending from a rim, an outer sidewall ( 60 ), and an installed condition with the inner sidewall in threaded engagement with the neck. The outer sidewall has a radially inwardly protruding barb ( 80 ) having a ramping surface ( 82 ) and a stop surface ( 84 ). The container body shoulder has a lug ( 90 ) having a ramping surface ( 92 ) and a stop surface ( 94 ). A first projection ( 120 ) protrudes radially outward from the outer sidewall to a first circumferential side of the barb and a second projection ( 122 ) protrudes radially outward from the outer sidewall to a second circumferential side of the barb.

What is claimed is: 
     
         1 . A container system ( 20 ) comprising:
 a container body ( 22 ) having:
 a sidewall ( 26 ); 
 a shoulder ( 32 ); and 
 an externally threaded neck ( 34 ) extending from the shoulder; and 
   a closure ( 24 ) having:
 an internally threaded inner sidewall ( 50 ) extending from a rim; 
 an outer sidewall ( 60 ); and 
 an installed condition with the inner sidewall in threaded engagement with the neck, wherein: 
   the outer sidewall has a radially inwardly protruding barb ( 80 ) having a ramping surface ( 82 ) and a stop surface ( 84 );   the container body shoulder has a lug ( 90 ) having a ramping surface ( 92 ) and a stop surface ( 94 );   a first projection ( 120 ) protrudes radially outward from the outer sidewall to a first circumferential side of the barb; and   a second projection ( 122 ) protrudes radially outward from the outer sidewall to a second circumferential side of the barb.   
     
     
         2 . The system of  claim 1  wherein:
 the closure comprises a circumferential gap between the first projection and the second projection. 
 
     
     
         3 . The system of  claim 1  wherein:
 the lug protrudes upward from the shoulder and radially outward from the neck. 
 
     
     
         4 . The system of  claim 1  wherein:
 the closure has an upper web ( 70 ) having a central portion ( 72 ) vertically recessed relative to an outer portion ( 74 ). 
 
     
     
         5 . The system of  claim 4  wherein:
 a circumferential wall ( 76 ) connects the central portion to the outer portion. 
 
     
     
         6 . The system of  claim 5  wherein:
 a plurality of vertical webs ( 78 ) span between the central portion and the circumferential wall. 
 
     
     
         7 . The system of  claim 1  wherein:
 the closure has an upper web having an underside bearing a plurality of projections ( 200 ) radially overlapping with a rim ( 36 ) of the neck. 
 
     
     
         8 . The system of  claim 7  wherein:
 the projections are ramps, each having a surface ( 202 ) at the same pitch as a pitch of the internal thread of the inner sidewall. 
 
     
     
         9 . The system of  claim 1  wherein:
 the stop surfaces of the barb and the lug are oriented circumferentially off-radial in a direction that resists their overriding each other. 
 
     
     
         10 . The system of  claim 1  wherein:
 the stop surfaces of the barb and the lug are oriented circumferentially off-radial by at least 10° in a direction that resists their overriding each other. 
 
     
     
         11 . The system of  claim 1  wherein:
 a plurality of vertical webs ( 79 ) connect the inner sidewall to the outer sidewall. 
 
     
     
         12 . The system of  claim 1  wherein:
 a radial web ( 83 ) connects the first projection and the second projection. 
 
     
     
         13 . A method for using the system of  claim 1 , the method comprising:
 squeezing the first projection and the second projection toward each other to radially outwardly shift the barb; and   unscrewing the closure while maintaining the squeezing.