Container with safety cap

Claim 2

An article of manufacture comprising a container of plastic material having an opening at one end in a round neck thereon, a round cap threadedly connected to threads on said neck, an elliptical retainer mounted on one of said cap and container below the elevation of the threads, diametrically opposite lugs on the minor diameter of the retainer on the inner peripheral surface thereof, mating lugs on one of said cap and neck for cooperation with the lugs on the retainer for preventing the cap from being rotated relative to the neck, each lug having a side face lying along a radius of the neck for engagement with the side face of another lug, each lug having a cam surface at an acute angle with respect to its side face, and said retainer being of flexible material so that the retainer may be deformed to disengage the mating lugs and permit rotation of the cap relative to the neck.

Claim 3

An article of manufacture comprising a container having an opening at one end in a round neck thereon, a round cap threadedly connected to threads on said neck, said neck having a bead on the outer periphery thereof, an elliptical retainer mounted on said bead below said threads, diametrically opposite lugs on the minor diameter of the retainer on the inner peripheral surface thereof, mating lugs on said cap for cooperation with the lugs on the retainer for preventing the cap from being rotated relative to the neck, means on said bead and retainer to prevent relative rotation between said bead and retainer, each lug having a side face lying along a radius of the neck for engagement with a side face of another lug, each lug having a cam surface at an acute angle with respect to its side face, said retainer being a flexible material so that the retainer may be deformed to disengage the mating lugs and permit rotation of the cap relative to the neck, the upper edge of said retainer being above the lower edge of said cap, the minor diameter of the retainer being greater than the outer diameter of the cap, and said mating lugs being on the outer periphery of said cap.

Claim 4

An article of manufacture comprising a container having an opening at one end in a round neck thereon, a round cap threadedly connected to threads on said neck, said neck having a bead on the outer periphery thereof, an elliptical retainer mounted on said bead below said threads, diametrically opposite lugs on the minor diameter of the retainer on the inner peripheral surface thereof, mating lugs on said cap for cooperation with the lugs on the retainer for preventing the cap from being rotated relative to the neck, means on said bead and retainer to prevent relative rotation between said bead and retainer, each lug having a side face lying along a radius of the neck for engagement with a side face of another lug, each lug having a cam surface at an acute angle with respect to its side face, said retainer being a flexible material so that the retainer may be deformed to disengage the mating lugs and permit rotation of the cap relative to the neck, the upper edge of said retainer being above the lower edge of said cap, the minor diameter of the retainer being greater than the outer diameter of the cap, and said mating lugs being on the outer periphery of said cap.

Claim 5

An article in accordance with claim 2 wherein the number of mating lugs on the outer periphery of said cap exceeds the number of lugs on the inner periphery of said retainer.

Claim 6

An article in accordance with claim 2 wherein the outer periphery of said bead has a flat face with a mating face on said retainer, said retainer being snapped over said bead so that the bead projects into a groove on the inner periphery of said retainer.

Claim 7

An article in accordance with claim 2 including a sealing member within said cap engaging an end face of said container to hermetically seal the cap to the container.

Claim 8

An article in accordance with claim 2 wherein said plastic container is made from a polymeric plastic, and said retainer is made from a polymeric plastic.

Claim 9

An article in accordance with claim 2 wherein said container is a vitreous material and said retainer is a polymeric plastic.