Push tab vial assembly and methods

1. A push tab container assembly, comprising:

(a) a container having an open end, an external surface, an internal surface; exactly one external container thread positioned on the external surface; at least one internal container thread positioned on the internal surface; and a push tab assembly mounted on the external surface, the push tab assembly including:

(i) an engagement member having a top surface facing the open end, and a contact edge defining a free end of the engagement member;

(A) the contact edge being spaced radially outwardly from the external surface of the container;

(ii) at least one connecting arm adapted to mount the engagement member to the external surface of the container; and

(iii) a locking member extending from the top surface of the engagement member in a direction toward the open end of the container; the locking member defining a ramped surface facing the open end; the ramped surface ending at a locking edge;

(A) the locking edge being vertically oriented with respect to the ramped surface; and

(B) the locking edge being tapered as it extends radially inwardly;

(b) a lid configured to mate with the container in an unlocked state and in a locked state, the lid including first and second peripheral skirts;

(i) the first skirt having at least one external lid thread positioned on an external surface of the first skirt;

(ii) the second skirt having at least one internal lid thread and at least one locking lug positioned on the internal surface of the second skirt;

(A) the locking lug including a lug edge projecting radially from the second skirt;

(B) the lug edge being tapered as it extends radially inwardly;

(iii) when the lid is operably oriented relative to the container in the unlocked state the at least one external lid thread is mated with the at least one internal container thread; and

(iv) when the lid is operably oriented relative to the container in the locked state:

(A) the at least one internal lid thread is mated with the exactly one external container thread;

(B) the locking edge of the locking member is engaged against the lug edge of the locking lug; and

(C) the engagement member of the push tab assembly is actuatable to release the locking edge of the locking member from the lug edge of the locking lug to permit disengagement of the lid from the container.

2. The assembly of claim 1 wherein the locking edge is tapered at an angle of 10-30 degrees.

3. The assembly of claim 1 wherein the locking edge is tapered at an angle of 15-25 degrees.

4. The assembly of claim 1 wherein the lug edge is tapered at an angle of 10-30 degrees.

5. The assembly of claim 1 wherein the lug edge is tapered at an angle of 15-25 degrees.

6. The assembly of claim 1 wherein the second skirt has an external surface with a perimeter shaped as a regular polygon having at least 6 sides.

7. The assembly of claim 6 wherein the second skirt external surface has at least 10 sides.

8. The assembly of claim 7 wherein each of the sides of the second skirt external surface is serrated.

9. The assembly of claim 1 wherein the contact edge is beveled in a direction downwardly and outwardly from a direction of the open end of the container.

10. The assembly of claim 9 wherein the contact edge is beveled at an angle of 40-50 degrees.

11. The assembly of claim 9 wherein the contact edge has a finish of SPI A-2.

12. The assembly of claim 1 , wherein the second skirt has at least two internal lid threads.

13. The assembly of claim 1 wherein:

(a) the container internal surface has exactly one internal container thread positioned on the internal surface;

(b) the second skirt has exactly two internal lid threads; and

(c) the first skirt has exactly one external lid thread.

14. The assembly of claim 1 , wherein the push tab assembly further includes at least one stop member extending from the engagement member in a direction opposite the open end, the stop member arranged and configured to be engageable against the external surface of the container when the locking member is disengaged from the locking lug.

15. The assembly of claim 1 wherein the second skirt has exactly two locking lugs positioned on the internal surface of the second skirt.

16. The assembly of claim 15 wherein the two locking lugs are located about 180 degrees relative to each other.