Patent ID: 7331479

Claim:
A releasable locking cap and container having a common longitudinal axis where the container has an opening with at least one container thread adjacent the opening with the thread sized and located to threadingly engage at least one cap thread formed on a skirt of the cap by relative rotation about the longitudinal axis, comprising: a shaped end on at least one of the cap or container thread and a barb on the other of the at least one cap or container thread, the barb being on a leading end of the thread; a resilient locking tab extending from one of the cap's skirt or container, the locking tab being spaced apart from the shaped end a distance along the longitudinal axis sufficient to allowing passage of the barb beyond the shaped end but and a second position sufficiently close to resiliently urge the barb into overlapping rotational alignment with the shaped end, the shaped end being configured to lockingly engage the barb, the resilient locking tab and the shaped end overlapping along the rotational direction so that a plane containing the longitudinal axis intersects both the locking tab and the shaped end.