Security screw cap

Claim 1

A security screw cap for receptacles for preventing access to dangerous products that may be contained therein by children but which may be used by adults as a normal screw cap, comprising: a first internally threaded sleeve having an upper part closed by a disc including on it upper surface a contour in relief, and having on a lower part of its outer wall a plurality of regularly spaced abutments; and a second, external sleeve having an upper disc including means defining a complementary recess to said contour in relief of the first sleeve, and the inner surface of the wall of which has (a) at its lower part a continuous rim cooperating with said abutments of the first sleeve to hold it clipped in the second sleeve, (b) at its upper part a plurality of guide ribs allowing free rotation of the second sleeve on the first sleeve and (c), between said ribs and said rim, two continuous circular grooves for selectively receiving said abutments, said grooves being separated by a distance such that when said abutments are engaged in the groove nearest said rim said contour in relief is located below the plane of the disc of the second sleeve to provide a security position allowing free rotation of the second sleeve in both directions and when said abutments are brought into the groove furthest away from said rim by a pressure on the second sleeve after previously positioning it to bring said contour in relief to face said complementary recess the second sleeve is fixed to the first sleeve by engagement of said contour in relief in said complementary recess, the two sleeves being able to remain in this position to allow a normal use of the screw cap, or to be returned into said security position, after screwing the first sleeve onto a receptacle, by simply pulling on the second sleeve.