US 4,047,495 AGranted

Child resistant dispensing closures

AssigneePolytop Corporation

InventorEdward D. O'Brian

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Abstract

A dispensing type container closure having a lid pivotally mounted on the closure so as to be capable of being moved between a closed position in which the lid closes off an opening through the top of the container and an open position in which this opening is uncovered can be made child resistant in character by including a recess in the top of the closure into which the lid is adapted to fit so that in the closed position the lid cannot be manually engaged to be rotated from the closed position. A fulcrum is provided within the recess and the lid is made so that when the lid is in the closed position pressure can be applied to the lid in order to pivot or move a portion of the lid remote from where the lid is hinged on the closure to a sufficient extent so that this portion of the lid can be manually engaged and moved from the closed position. Preferably a toggle structure is employed to connect the lid and the closure so as to hold the lid in either the closed or the open position. A part of this toggle structure is employed to increase the flexibility of the lid so as to facilitate pressure being applied to move the lid from the closed position.

Claims4

Dependent claims

A container closure having a top with an opening extending therethrough, means for mounting said top on a container attached to said top and extending around said opening, hinge means secured to said top, a lid secured to said hinge means so as to be capable of being rotated between a closed position in which the lid overlies the top and covers the opening and an open position in which said opening is exposed in which the improvement comprises:

a recess having a bottom located in said top of said container,
a fulcrum located between said hinge means and said opening extending from the bottom of said recess upwardly into said recess,
said lid fitting within said recess when in its closed position so that said lid cannot be manually engaged to be lifted from said closed position,
overcenter toggle means connecting said lid and said top for controlling the position of said lid so that said lid is held by the action of said toggle means in either said closed or said open position, said toggle means being located adjacent to said hinge means,
said toggle means including a bell crank lever structure having ends, other hinge means pivotally connecting one of said ends of said lever structure to a side portion of said top and further hinge means pivotally connecting the other of said ends of said lever structure to said lid, said lever structure being capable of deflecting as said lid is moved between said open and said closed positions,
said toggle means being capable of responding to pressure applied vertically against said further hinge means when said lid is in said closed position so as to pivot said lid about said fulcrum to a sufficient extent so that said lid can be engaged to be further moved to said open position.

3 more elements

Dependencies are inferred from the claim text.