| 摘要 |
A child-resistant, two-piece closure which may be attached to a container by conventional capping machines. An inner cap member is formed with a circular top panel having a depending skirt integrally molded therewith. The depending skirt is threaded on its interior surface for engagement with a conventional threaded container finish. A ring wall projects vertically from the periphery of the top panel of the inner member. A plurality of spaced apart drive projections extend upwardly from the ring wall. Plural ratchet lug means also extend upwardly from the upper surface of the top panel. An outer member is likewise formed with a circular top panel and an integral depending skirt. Integrally formed with the interior of the outer member top panel are a plurality of downwardly extending leaf spring members. A plurality of drive lugs extend downwardly from the periphery of the interior of the outer member top panel. The two members are assembled by pressing the inner member over a retention bead formed in the interior of the lower portion of the outer member depending skirt. The leaf spring members are inclined from a horizontal plane and will drivingly engage the ratchet lug means in the tightening direction to allow the assembled closure to be put on a container. However, the leaf spring members will slip over the lug means if one attempts to remove the closure, thus allowing the outer member to rotate freely with respect to the inner member. To remove the closure, the outer member must be pressed down to overcome the bias of the leaf spring members. This will bring the drive lugs of the outer member into engagement with the spaces between the drive projections of the inner member, thereby allowing rotation of the inner and outer members in unison to allow removal of the closure. |
