초록

This invention concerns plastic lids and pails having improved child-proof locking features. Intermittently placed teeth-like elements located on the pail and lid interlock to prevent the easy opening of the assembled pail and lid.

대표청구항 ▼

In a stiff molded plastic pail and lid therefor, said lid having an inverted U-shaped rim containing threaded portions and configured to fit over and receive the upper periphery of said pail, said pail having threaded portions about its outer upper periphery for mating with said threaded portions of

In a stiff molded plastic pail and lid therefor, said lid having an inverted U-shaped rim containing threaded portions and configured to fit over and receive the upper periphery of said pail, said pail having threaded portions about its outer upper periphery for mating with said threaded portions of said lid, the improvement comprising: first engagement means comprising a first plurality of toothed areas located on the inner wall of said lid rim, said toothed areas extending radially inwardly from said inner wall toward the center of said lid; and second engagement means comprising a second plurality of toothed areas, configured to releasably mate with at least a portion of said first plurality of toothed areas, said second toothed areas being located along the upper outer periphery of said pail, but out of phase with respect to said first plurality of toothed areas extending radially outwardly and at least a portion thereof being matable with said first engagement means when said lid is threaded down upon said pail for preventing rotation of said lid with respect to said pail by a child, the threaded engagement between said pail and said lid preventing prying off of the latter by a child, whereby the pail and lid are child-proof when closed.