초록 ▼

An improved safety closure for containers is disclosed; the closure comprises a snap-on cap held in place on a container by a rotary safety ring which must be aligned with the cap in one angular position and pushed downwardly away from the cap before one can remove the cap from the container. The cl

An improved safety closure for containers is disclosed; the closure comprises a snap-on cap held in place on a container by a rotary safety ring which must be aligned with the cap in one angular position and pushed downwardly away from the cap before one can remove the cap from the container. The closure is improved by providing an outwardly directed bead on the safety ring which makes it easier to grip and push down (and up) the safety ring. An annular protrusion, added to the underside of the cap, and a circumferential knob, added to the neck of the container, improve the seal of the container. Also, a safety ring and cap assembly which has no lateral opening between the safety ring and the cap is disclosed. This invention describes various ways to incorporate on the closure means for counting the number of uses or doses of the container\s contents. Finally, two specific embodiments of the closure, a closure for a powder container and a pipette dropper safety closure, are described with some of the improvements.

대표청구항 ▼

A safety closure for a container having a rim defining an open mouth and a peripheral lip around the rim, said closure comprising: a cap having a top overlying said mouth and said rim and having a depending annular flange projecting below said top, said flange having an inwardly directed circumferen

A safety closure for a container having a rim defining an open mouth and a peripheral lip around the rim, said closure comprising: a cap having a top overlying said mouth and said rim and having a depending annular flange projecting below said top, said flange having an inwardly directed circumferential bead engaged below said lip, and an outwardly directed circumferential bead located below said top and cooperating therewith to define a circumferential locking groove extending around the outer side of said flange; a rotary safety ring having an annular sidewall surrounding said flange and overlying said locking groove and said outwardly directed circumferential bead, said annular sidewall being closely spaced to said locking groove and said outwardly directed circumferential bead so that said inwardly directed bead is held in engagement with said lip and prevents removal of said cap; a plurality of angularly spaced fingers on the inner side of said sidewall projecting into said locking groove and overlying the bottom wall of said groove to prevent downward movement of said ring along said cap, said fingers being inclined inwardly and downwardly into said locking groove having free inner ends positioned to be wedged against the bottom of the locking groove to prevent free flexing of the fingers as the ring is pulled downwardly relative to the cap, thereby normally preventing downward movement of said ring out of overlying relation with said locking groove; a plurality of longitudinally extending release grooves in said outwardly directed circumferential bead, spaced and sized to permit movement of said fingers through said outwardly directed circumferential bead in one angular position of said ring about said cap, and thus allowing downward movement of said ring away from said cap for the removal of the latter from the container in said one angular position; and an annular protrusion projecting from the surface of the underside of said top, said protrusion having a diameter slightly less than the inside diameter of said rim so that said protrusion closely abuts said rim when said cap is securely closed on said container; whereby a safety closure with an improved liquid-tight seal is disclosed.