Childproof closure for large containers

Details Childproof closure for large containers Childproof closure for large containers

1989-01-30

1990-10-09

Marcus, Stephen

Receptacles

Closures

With closure opening arrangements for means

220276, 215216, 215256, B65D 1734

Patent

active

049615122

ABSTRACT:
A screw top container lid defines child-proof opening means which are especially suitable for use with container lids of large size. The container lid has a top wall and a peripheral wall with an inner surface, typically with screw threads for attachment to a container lip. The inner surface of the peripheral wall also defines a ratchet for engagement with corresponding ratchet on a container when the lid is applied to it, to permit screw-threaded rotation of the lid in a tightening direction to seal the lid on the container in a closed condition, but to prevent counterrotation of the lid to permit removal from the container. A portion of the peripheral wall defines removable tear strip means. The tear strip carries at least some of the ratchet of the peripheral wall, with the result that a container carrying the lid in its closed condition may be opened by removing the tear strip to facilitate counterrotation of the lid. Desirably, a second portion of the ratchet of the peripheral wall remains after removal of the tear strip, to maintain a lock that normally prevents counterrotation. This ratchet portion may be in one or more sections, and may be proportioned to permit manual flexing thereof out of engagement with the corresponding ratchet of the container, so that the lid may be manually removed, but once again locked upon reapplication of the lid. By this means, its child-proof characteristic remains even after opening.

REFERENCES:
patent: 3901404 (1975-08-01), Feldman
patent: 3980195 (1976-09-01), Fillmore
patent: 4512493 (1985-04-01), Von Holdt
patent: 4548329 (1985-10-01), Curry
patent: 4687112 (1987-08-01), Swartzbaugh
patent: 4711364 (1987-12-01), Letica

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