Abstract: A child-resistant closure for liquid medicaments consisting of two parts, a dosage cup and a bottle adapter. Dosage cup is configured to have cap lugs which reversibly engage helical locking lugs. In thread-on bottle adapter embodiments, helical locking lugs are located on the bottle adapter. In press-in bottle adapter embodiments, helical locking lugs are located on the neck finish of the bottle. A downward force is required to close the system, said force deforming a flexible shoulder, which in turn, creates an upwardly biasing force acting on the dosage cup to lock it in place in a child-resistant manner.

Abstract: An improved child-resistant closure for dispensers of liquid medicaments, the closure being of a two-part construction. The closure has an outer cap with a quantity of shoulder lugs and skirt lugs and an inner cap with a quantity of shoulder lugs and flexible beams. The closure has equal quantities of shoulder lugs on the inner and outer caps, equal quantities of skirt lugs and flexible beams, flexible beams having an arcuate underside, shoulder lugs having a depth to prevent hyper-flexion of the flexible beams, and an ideal overlap when the faces of the shoulder lugs are aligned. Additionally, provided are methods for attaching and removing the cap from a pre-existing bottle.

Abstract: A child-resistant closure for liquid medicaments consisting of two parts, a dosage cup and a bottle adapter. Dosage cup is configured to have cap lugs which reversibly engage helical locking lugs. In thread-on bottle adapter embodiments, helical locking lugs are located on the bottle adapter. In press-in bottle adapter embodiments, helical locking lugs are located on the neck finish of the bottle. A downward force is required to close the system, said force deforming a flexible shoulder, which in turn, creates an upwardly biasing force acting on the dosage cup to lock it in place in a child-resistant manner.