초록 ▼

A child-resistant molded plastic container lid for open head containers wherein a threaded connection is provided between the container and lid. The lid is provided with at least one and in certain instances with a pair of diametrically disposed resiliently biased locking members, pivotally connecte

A child-resistant molded plastic container lid for open head containers wherein a threaded connection is provided between the container and lid. The lid is provided with at least one and in certain instances with a pair of diametrically disposed resiliently biased locking members, pivotally connected to the closure, which cooperate with locking teeth on the container. The lever arms of the locking members are offset and substantially parallel to each other on opposite sides of the pivotal connection. An elliptical spring is integrally connected to each lever arm and cooperates with portions of a gusset wall enclosing the lever arm to provide continued biasing memory on the locking member. A seal arrangement is also provided between the lid and the container to provide a tight and rigid seal and to reinforce the top of the container and lid to prevent the lid from popping off the container when it is dropped while full of liquid or powder material.

대표청구항 ▼

In combination; a child-resistant molded plastic container lid and an open head container, said lid having an annular inverted U-shaped rim including a top wall, an outer wall and an inner wall, and configured to fit over and receive the upper peripheral edge of said container, said lid rim containi

In combination; a child-resistant molded plastic container lid and an open head container, said lid having an annular inverted U-shaped rim including a top wall, an outer wall and an inner wall, and configured to fit over and receive the upper peripheral edge of said container, said lid rim containing thread portions, said container having thread portions about its outer upper periphery for mating with said threaded portions of said lid, locking teeth provided on the inner peripheral surface of the upper end portion of the container, at least one locking member, means pivotally connecting said locking member to the lid in proximity to the rim thereof, wall portion means on said lid in proximity to said locking member, said locking member including a lever arm offset from said pivot connection means and extending in a direction toward the container teeth, a thumb engaging portion integrally connected to said lever arm and positioned on the opposite side of the pivot connection means, spring means mounted between the lever arm and wall portion means on the lid for biasing the lever arm in a direction for engaging the teeth, and an opening provided in the inner wall of said lid rim in the vicinity of said locking member for accommodating the movement of the lever arm toward and away from the container teeth and another opening provided in the inner wall of said lid rim for accommodating the corresponding movement of the thumb engaging portion, whereby when the lid is threaded down upon said container to a closed position, the lever arm is biased to a locking engagement with the teeth, to thereby prevent rotation of the lid in the opposite direction to an open position by a child.