Safety closure and container combination

• US 4,275,817 A
• Filed: 10/11/1979
• Issued: 06/30/1981
• Est. Priority Date: 10/11/1979
• Status: Expired due to Term

• Current Assignee: Specialty Acquisition Corporation
• Original Assignee: Ethyl Corporation (Newmarket Corporation)
• Inventors: Patton, John S.
• Primary Examiner(s): Hall, George T.
• Application Number:
  US06/083,978
• Time in Patent Office: 628 Days
• Field of Search: 215/217, 215/222, 215/223, 215/329, 215/330, 220/293, 220/295, 220/296
• US Class Current: 215/217
• CPC Class Codes: B65D 50/043 the closure comprising a screw cap whose threads are shaped to accommodate blocking elements and the closure is removed after first applying axial force to unblock it and allow it to be unscrewed

Abstract

A safety closure and container combination is disclosed. The container and closure each have mating lugs which cooperate with each other to move the closure toward the container when rotated in a first direction and to move the closure away from the container when moved in a second direction. Cooperating stop surfaces are provided on the closure and container which engage when the closure is rotated in a direction to move it away from the container so that it is necessary to move the closure toward the container to allow the stop surfaces to move past each other thereby allowing the closure to be removed from the container.

Claims

1. In combination, a safety closure and a container,

said container having a neck comprising a first rim terminating in a first open end,

spaced relatively rigid first lugs fixed to said first rim,

said first lugs each having a first end and a second end and a generally straight relatively flat first ramp surface on the side of said first lugs remote from said first open end and a second ramp surface on the side thereof opposite said first surface,

said first lugs being inclined from said first end toward said second end and toward said first open end,

said closure having a second rim having a closed end and a second open end adapted to receive said first rim of said container,

a resilient liner in said closure engaging said closed end, spaced relatively rigid second lugs fixed to said second rim,

said second lugs each having a first end and a second end and a generally straight relatively flat third ramp surface inclined from said first end toward said second end and toward said second open end of said rim on the sides of each said second lug remote from said second open end

and a fourth ramp surface on the side of each of said second lugs opposite said third ramp surface on the side thereof remote from said second open end,

stops fixed relative to said first lugs and adjacent said first end thereof and on the side of a line passing through said first ramp surface from said first end to said second end of said first lugs, remote from said first open end, and above a line passing through the third ramp surface,

whereby, said closure and said container may be telescoped with one another bringing said fourth ramp surfaces into engagement with said second ramp surfaces and upon a relative rotation of said closure and said container in a first direction moving said second lugs past said stop thereby compressing said liner and bringing said third ramp surfaces into engagement with said first ramp surfaces,

and bringing said second ends of said second lugs into engagement with said stops holding said closure and said container against relative rotation in a second direction,

and upon movement of said closure toward said container compressing said liner moving said second end of said second lugs back past said stops allowing said closure and container to be rotated relative to one another in said second direction removing said closure from said container.

2. The combination recited in claim 1 wherein said first lugs are integral with said stops.

3. The combination recited in claim 1 wherein said first lugs are substantially equal in length to said second lugs to said rim.

4. The combination recited in claim 1 wherein said first lugs are spaced from said stops.

5. The combination recited in claim 1 wherein said first lugs are on said container.

6. The combination recited in claim 5 wherein said stops are on said container.

7. The combination recited in claim 6 wherein said stops are in the form of generally cylindrical members extending axially from said neck.

8. The combination recited in claim 7 wherein said second lugs are spaced from each other a distance substantially equal to the length of each said second lug plus the distance for each said second lug to the side of said stop remote from said second lug.