Pharmaceutical Container Having Non-Child-Resistant Closure
A non-child-resistant closure and container system for a pharmaceuticals comprises a cap configured to cooperate with a2 container. The container has at least one bayonet structure that includes a leading taper, a recess, and a backstop. The cap has an outer shell that includes a skirt and at least one lug formed thereon. The lug is configured to cooperate with the bayonet structure such that one of an audible signal and a tactile sensation is produced upon closing the cap onto the container. The cap is closed onto the container by rotating the cap until a portion of the lug enters the recess. The lug is further configured to be released from the recess by reverse rotation of the cap causing the lug to move axially relative to the recess.
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This invention relates in general to pharmaceutical containers. In particular, this invention relates to non-child-resistant closures for pharmaceutical containers.
Pharmaceutical containers are used to dispense drugs and other medicines from a pharmacist to patients. Because of the potential for children to gain access to these medicines with potentially dangerous effects, closure devices have been provided with various mechanisms to prevent or deter small children from gaining access to the contents. One popular type of child-resistant (CR) closure and container system is a push and turn type system that includes a cap having an outer shell and an inner seal. While this closure configuration has the intended result of hampering or preventing small children from gaining unauthorized access to medicines, it also has the unintended result of hampering access to medicines by the elderly or physically challenged patients. The difficulty lies in certain users having a lack of manual dexterity and strength to both compress and twist the cap. For this reason, non-child-resistant caps are still in substantial use.
Previous non-child-resistant closures, such as traditional snap caps, are easy to open but may not provide adequate sealing to contain liquids or may be inadvertently opened, such as when carried in a purse or pocket. Other non-child-resistant cap configurations may include external threads that engage threads formed on the inner diameter of the container. However, forming threads on containers, particularly on the inner diameter of the containers, increases the cost of manufacture. Other non-child-resistant closure configurations do not provide any indication that they are truly in a closed position. Thus, it would be desirable to provide an improved non-child-resistant closure for pharmaceutical containers.
SUMMARY OF THE INVENTIONThis invention relates to a non-child-resistant closure and container system for a pharmaceuticals. The system comprises a container and a cap configured to cooperate with the container. The container has at least one bayonet structure that includes a leading taper, a recess, and a backstop. The cap has an outer shell that includes a skirt and at least one lug formed thereon. The lug is configured to cooperate with the bayonet structure such that one of an audible signal and a tactile sensation is produced upon closing the cap onto the container. The cap is closed onto the container by rotating the cap until a portion of the lug enters the recess. The lug is further configured to be released from the recess by reverse rotation of the cap causing the lug to move axially relative to the recess.
The lug of the cap includes a primary profile and a secondary profile. The primary profile engages the recess and the secondary profile controls the amount of engagement of the lug into the recess. The secondary profile further controls the compression of a resilient inner seal having a spring force characteristic and a spring rate. The amount of engagement of the primary profile into the recess compresses the resilient inner seal. Compression of the resilient inner seal is such that the lug is permitted to be released from the recess by rotation of the cap. Rotation of the cap causes the lug to move axially relative to the recess.
Various aspects of this invention will become apparent to those skilled in the art from the following detailed description of the preferred embodiment, when read in light of the accompanying drawings.
Referring now to the drawings, there is illustrated in
Referring now to
Referring now to
The integral inner seal 34a includes an anchor section 37a that is formed integrally with the outer shell 28a. The anchor section 37a extends from an inner surface of the back portion 32a of the outer shell 28a. In the illustrated embodiment, the anchor section 37a is thicker than the edge seal 38a. The tapered surface 36a may extend from the anchor portion 37a and provide the inner seal 34a with a gradually decreasing cross section. The gradually decreasing cross section of the inner seal 34a has a spring rate that applies a sealing force against the container 14 as the closure 12a is moved to the closed position of
Referring now to
To open the cap 12 from the container 14, the outer shell 28 is twisted relative to the container 14 in the opposite direction of the closing movement. The depth of engagement between the primary profile 40 and the recess 22 is controlled by the secondary profile 42 such that added compression of the inner seal 34 required to disengage the primary profile 40 from the recess 22 can be achieved without requiring the application of a secondary axial force to the outer shell 28. In other words, the secondary profile 42 limits the spring force generated by the inner seal 34 so that when the cap is unscrewed, the lug 26 disengages from the recess 22. The lug 26 disengages from the recess 22 without an additional axial force being applied by the user to urge the lug 26 away from engagement with the recess 22. As shown in
The primary profile 40 is offset or spaced apart from the secondary profile such that a depth of engagement “B”, as shown in
Referring now to
Referring now to
The cap is aligned on the container so that the lugs may pass vertically between adjacent bayonet structures. Rotating the cap on the container causes the lugs to contact the leading taper of the bayonet structure. As the cap continues to be rotated, the lugs 526 move along the leading taper which draws the outer shell toward the container. The outer shell compresses the inner seal into the opening of the container. The lugs 526 are rotated beyond the taper toward the back stop portion. The lugs 526 are then drawn into the recess 22 by the spring force of the compressed inner seal to lock the cap onto the container. If the cap is rotated relative to the container, without a secondary axial force applied to the cap, the seating of the lug 526 into the recess 22 provides both of an audible signal and a tactile sensation to indicate the lid has been properly secured. The seating of the lug into the recess may also provide one of the audible and tactile indicators to the user in certain instances. Rotating the cap without compressing the cap against the container provides an added confirmation that the cap is properly closed. The inner seal maintains a residual compression to provide a liquid and/or air tight seal.
To release the child-resistant cap from the container, a downward force is applied to the cap causing the inner seal to be further compressed from the closed seal state. The lugs 526 are then axially disengaged from the recesses 22 of the bayonet structure 16. A rotational force is required to slide the lugs around the cam surface on the bayonets and back to the spaces between adjacent bayonets. The torque to rotate the container lid increases with the amount of axial force applied to compress the seal. The axial force is high enough to prevent or frustrate a child's attempts to open the container. By way of the coefficient of friction between the inner seal and one of the outer shell of the child-resistant cap or the container 14, the torque to rotate the cap to a removable position also increases while compressing the inner seal. As previously mentioned, certain of the elderly or physically challenged patients may be hampered or even prevented from accessing their medications with these child-resistant closure systems. The difficulty lies in certain users having a lack of manual dexterity and strength to both compress and twist the cap. Depending upon the materials selected for the container and the inner seal and outer shell of the cap, the different coefficients of friction of the contacting materials may add to the difficulties in opening these pharmaceutical containers.
Referring now to
The principle and mode of operation of this invention have been explained and illustrated in its preferred embodiment. However, it must be understood that this invention may be practiced otherwise than as specifically explained and illustrated without departing from its spirit or scope.
Claims
1. A non-child-resistant closure and container system for a pharmaceutical comprising:
- a container having at least one bayonet structure that includes a leading taper, a recess, and a backstop; and
- a cap configured to cooperate with the container and having an outer shell that includes a skirt and at least one lug formed thereon, the lug configured to cooperate with the bayonet structure such that one of an audible signal and a tactile sensation is produced upon closing the cap onto the container and rotating the cap until a portion of the lug enters the recess, and the lug being further configured to be released from the recess by reverse rotation of the cap causing the lug to move axially relative to the recess.
2. The non-child-resistant closure and container system of claim 1 wherein the cap includes a resilient portion having a spring rate and the resilient portion being configured to engage the portion of the lug into the recess when the cap is moved to a closed position.
3. The non-child-resistant closure and container system of claim 1 wherein the rotation of the cap from a closed and latched position to an unlatched position causes the lug to move axially out of engagement with the recess in response to compression of a resilient inner seal that is disposed between the container and the outer shell.
4. The non-child-resistant closure and container system of claim 3 wherein the resilient inner seal provides a fluid tight engagement with the container.
5. A non-child-resistant closure and container system for a pharmaceutical comprising:
- a container having at least one bayonet structure that includes a leading taper, a recess, and a backstop; and
- a cap having at least one lug configured to cooperate with the bayonet structure, the lug having a primary profile that engages the recess and a secondary profile that controls the amount of engagement of the lug into the recess.
6. The non-child-resistant closure and container system of claim 5 wherein the primary and secondary lug profiles are primary and secondary lug upper surface profiles.
7. The non-child-resistant closure and container system of claim 5 wherein the primary and secondary lug profiles cooperate with the bayonet structure to provide at least one of an audible signal and a tactile sensation when the cap engages the container in a closed and axially retained position.
8. The non-child-resistant closure and container system of claim 5 wherein the primary profile is a step.
9. The non-child-resistant closure and container system of claim 5 wherein the primary profile is one of a bump, a ramp, and a pin.
10. The non-child-resistant closure and container system of claim 5 wherein the cap includes a separate resilient inner seal.
11. The non-child-resistant closure and container system of claim 5 wherein the cap includes an integral inner seal.
12. The non-child-resistant closure and container system of claim 5 wherein the primary profile is a pin and the pin contacts a portion of the backstop in the closed position.
13. The non-child-resistant closure and container system of claim 12 wherein the pin is positioned on the lug in a manner that will result in contact with the leading taper of the bayonet structure as the cap is moved to a closed position.
14. The non-child-resistant closure and container system of claim 9 wherein the cap includes a resilient inner seal.
15. The non-child-resistant closure and container system of claim 14 wherein the resilient inner seal is compressed between the outer shell and the container, the inner seal having a spring rate such that compression of the inner seal causes the primary profile to engage the recess and the secondary profile to engage another portion of the bayonet structure.
16. The non-child-resistant closure and container system of claim 7 wherein the cap includes a resilient inner seal that is compressed as the lug engages the leading taper of the bayonet structure, the at least one of the audible signal and the tactile sensation being produced in response to the compression of the resilient inner seal.
17. A non-child-resistant closure and container system for a pharmaceutical comprising:
- a container having at least one bayonet structure that includes a leading taper, a recess, and a backstop; and
- a cap having an outer shell, a resilient inner seal having a spring force characteristic, and at least one lug formed onto a portion of the outer shell and further configured to cooperate with the bayonet structure, the lug having a profile that controls compression of the resilient inner seal such that the spring force characteristic permits the lug to be released from the recess by rotation of the cap causing the lug to move axially relative to the recess.
18. The non-child-resistant closure and container system of claim 17 wherein the spring force characteristic is an inversely proportional function of a spring rate of the resilient inner seal and a depth of engagement between a primary profile of the lug and the recess.
19. The non-child-resistant closure and container system of claim 18 wherein a secondary profile of the lug is configured to engage another portion of the bayonet structure and thus limit the depth of engagement of the primary profile.
20. The non-child-resistant closure and container system of claim 19 wherein the primary and secondary lug profiles cooperate with the bayonet structure to provide at least one of an audible signal and a tactile sensation when the cap engages the container in a closed and axially retained position.
Type: Application
Filed: Sep 4, 2009
Publication Date: Mar 10, 2011
Applicant: PACIFIC MANAGEMENT HOLDING, LLC (Elyria, OH)
Inventor: Sean M. Brennan (Grafton, OH)
Application Number: 12/554,198
International Classification: B65D 41/06 (20060101);