Tamperproof container and cap assembly

Claim 2

A tamperproof container and cap assembly including a container having a sidewall with a top rim defining an opening, the improvement comprising: a peripheral flange extending radially from the sidewall; a cap comprising a top closure surface, an inner wall, a top wall and an outer wall, said inner wall, top wall and outer wall having an inverted U-shape and being located for engagement with said rim; said outer wall having a distal end which vertically overlies and is located adjacent said container flange when the cap is in its closed position on the container, with the cap and distal end being positioned to prevent access to the cap for removal; said outer wall defining a frangible section having a cross-sectional dimension that is smaller than the cross-sectional dimension of the major portion of said outer wall, a peripheral cap-engaging bead extending radially from said container rim above said peripheral flange; said outer wall defining an internal shoulder for cooperation with said cap-engaging bead and being located intermediate said frangible section and said distal end; said frangible section being located for positioning adjacent said cap-engaging bead when the cap is in its closed position on the container; a pair of spaced lugs carried by said outer wall, a frangible membrane coupling said spaced lugs to said outer wall frangible section, said lugs being spaced a sufficient distance to permit the insertion of a tool which may be operated to force said lugs apart thereby breaking said frangible membrane, with one of said lugs forming a pull tab, said pull tab being operative when pulled to cause removal of the portion of the outer wall between the frangible section and the distal end, thereby allowing access to the cap for removal.

Claim 3

A tamperproof container and cap assembly as described in claim 1, said frangible membrane coupling said spaced lugs to each other, with said cap comprising a one-piece integrally formed molded unit.

Claim 4

A tamperproof container and cap assembly including a plastic container having a sidewall with a top rim defining an opening, and a cap-engaging bead extending radially from said rim, the improvement comprising: said container carrying a peripheral flange which extends radially from the sidewall in a plane below said bead; a cap comprising a top closure surface, an inner wall, a top wall and an outer wall, said inner wall, top wall and outer wall having an inverted U-shape and being located for engagement with said rim; said inner wall dimensioned to cooperate with said rim with a plug fit; said outer wall having a distal end which vertically overlies and is located adjacent said container flange when the cap is in its closed position on the container, with the flange and the distal end being positioned to prevent access to the cap for removal; said outer wall defining an internal frangible section located adjacent said bead when the cap is in its closed position on the container, said outer wall defining an internal shoulder for cooperation with said cap-engaging bead and being located intermediate said frangible section and said distal end, said frangible section having a cross-sectional dimension that is smaller than the cross-sectional dimension of the major portion of said outer wall; a pair of spaced lugs carried by said outer wall, a frangible membrane coupling said spaced lugs to said outer wall frangible section, said lugs being spaced a sufficient distance to permit the insertion of a tool which may be operated to force said lugs apart thereby breaking said frangible membrane, with one of said lugs forming a pull tab, said pull tab being operative when pulled to cause removal of the portion of the outer wall between the frangible section and the distal end, thereby allowing access to the cap for removal.

Claim 5

A tamperproof container and cap assembly including a plastic container having a sidewall with a top rim defining an opening, and a cap-engaging bead extending radially from said rim, the improvement comprising: said container carrying a peripheral flange which extends radially from the sidewall in a plane below said bead; a cap comprising a top closure surface, an inner wall, a top wall and an outer wall, said inner wall, top wall and outer wall having an inverted U-shape and being located for engagement with said rim; said inner wall dimensioned to cooperate with said rim with a plug fit; said outer wall having a distal end which vertically overlies and is located adjacent said container flange when the cap is in its closed position on the container, with the flange and the distal end being positioned to prevent access to the cap for removal; said outer wall defining an internal frangible section located adjacent said bead when the cap is in its closed position on the container, said outer wall defining an internal shoulder for cooperation with said cap-engaging bead and being located intermediate said frangible section and said distal end, said frangible section having a cross-sectional dimension that is smaller than the cross-sectional dimension of the major portion of said outer wall; a pair of spaced lugs carried by said outer wall, a frangible membrane coupling said spaced lugs to said outer wall frangible section, said lugs being spaced a sufficient distance to permit the insertion of a tool which may be operated to force said lugs apart thereby breaking said frangible membrane, with one of said lugs forming a pull tab, said pull tab being operative when pulled to cause removal of the portion of the outer wall between the frangible section and the distal end, thereby allowing access to the cap for removal.

Claim 6

A tamperproof container and cap assembly as described in claim 5, said frangible membrane coupling said spaced lugs to each other, with said cap comprising a one-piece integrally formed molded unit.