Safety cap

Abstract

A screw-type safety cap for use in combination with a bottle is disclosed wherein the bottle is of the type having a threaded neck with a top planar edge. The cap includes a top wall and a depending peripheral skirt. The skirt has a thread on the inner surface thereof for rotatably engaging and securing the cap with the threaded neck of the bottle. The cap has a resilient member disposed under the top of the cap for engaging the top edge of the neck. The threads of the cap and the threads of the bottle are so dimensioned in thickness and space therebetween that the cap is axially slidable with respect to the bottle. The threads on the bottle have at least two interruptions which form at least two recesses in the threads of the bottle. The cap has at least two projections on the inner surface of the skirt. The projections are spaced both axially and radially with respect to each other as are the two recesses in the bottle thread. The projection on the skirt which is most spaced from the top of the cap is dimensioned so that it is too large to fit in any recess of the botttle other than the recess lowest on the neck of the bottle. The cap is secured to the bottle by rotating the cap until all of the projections are aligned with the recesses. The resilient member causes the cap to be urged away from the bottle and the projections to be disposed in the recesses whereby the cap is locked on the bottle and cannot be removed unless the user presses the cap against the bottle to dislodge the projections from the recesses to enable unscrewing of the cap.