Abstract: A child-resistant closure for a liquid container having a threaded neck. The closure comprises an inverted cup-shaped cap which has a shirt and on the inner side of its skirt has a thread that mates with the neck thread. The child-resistant means consists of an outwardly extending ring attached to the end of the skirt by frangible webs. The ring has a gap that is defined by an abutment at one end and a stop at the other end. A tab which permanently is connected to the cap skirt lies in the gap. The cap, ring and tab are unitary and are turned onto the neck to liquid sealing position at which time the ring engages a shoulder formed on the container at or near the base of the neck. The ring is then affixed to the shoulder. The container is opened by flexing the tab upwardly above the level of the abutment on the ring and rotating the cap and tab in a retrograde direction relative to the ring which breaks the frangible webs.

Abstract: A tamper-indicating closure combination consisting of a container having a circular neck and a twist-on cap therefor. The container neck has external interrupted thread sections with ratchet teeth on their under surfaces. The cap has similar, cooperating internal thread sections on the inner surface of its skirt with ratchet teeth on their upper surfaces. When the cap is turned onto the neck, the sets of ratchet teeth interengage and lock the cap against retrograde rotation. The cap also has a puller which is connected to the cap, a first section thereof being connected by frangible portions and a second section thereof being connected permanently to said cap. In order to remove the cap, the puller is broken away at the first section and then is pulled upwardly and outwardly relative to the container neck to disengage the cooperating sets of ratchet teeth. The cap is replaced by turning it onto the bottle neck for re-engaging the cooperating threads and ratchet teeth.

Abstract: A safety cap for sealing a container is disclosed. The cap is adapted to a container having a sidewall and annular upper shoulder extending to a neck portion that is threaded. In the vicinity of the neck portion is a cam member having a lug recess in the vicinity of the eccentric portion of the cam.The cap comprises an inner cup member with an integral continuous sidewall for sealing the container. On the inner cup member's interior surface, threads are formed to mate with the threads on the container. The sidewall has at least one downwardly projecting lug adapted to contact the recess on the cam member when the cap is in its sealing position. Alternatively, the inner cup member can include an inner cup with threads and a middle cup with lugs.Connected to the inner cup member or molded in one piece is an over cup that has a diameter equal to the span of an adult's hand. This cup is located so that when a force is exerted against it, it transversely deforms and translates the force to the inner cup member.

Abstract: A child-resistant overcap adapted to be positioned over a threaded screw cap which has axially extending ribs on the outer surface of its threaded skirt, in order to make the entire closure child-resistant. The overcap has a disc-like top and a cylindrical skirt which nests over the screw cap. An inwardly extending lip on the bottom edge of the overcap skirt retains the overcap in position after assembly. The disc-like top of the overcap is slotted with at least two diametric slots, arranged with their axes normal to each other. One slot is formed by two diametrically opposed, outwardlyconverging pairs of edges defining V-notches and the other slot may be a narrow slit. The inner wall of the overcap skirt has at least one axial driving rib which protrudes radially inwardly and is located at the outer end of the narrow slit.

Abstract: A tamperproof child resistant closure for a medicine bottle or the like. The closure has an inner threaded cap and an outer driver nested over the cap. There is a first co-operating, one-way clutch means on the driver and cap for screwing the cap onto the bottle. There is a second one-way, co-operating clutch means comprising an abutment on the outer wall of the cap skirt and an inwardly movable segment of the driver skirt. There is a removable sector portion of the driver top that is frangibly connected to the upper end of the segment and to the driver top which initially prevents inward movement of the segment for engaging the second clutch means.