Claims
- 1. A push button child-resistant closure cap for containers comprising an inner cap section which is screw-threaded for engagement with container screw-threads and an outer cap section which has a swiveled connection with the inner cap section, the inner and outer cap sections having alignable indicator elements thereon, the inner cap section having circumferentially spaced first and second stage tightening abutment surfaces and an unscrewing abutment surface which is circumferentially spaced from said first and second stage abutment surfaces, the inner cap section having a ramp including inclined surfaces ascending from a region of the inner cap section near the second stage tightening abutment surface and the unscrewing abutment surface, the outer cap section having circumferentially spaced first and second stage tightening lugs thereon adapted to engage said first and second stage tightening abutment surfaces in response to relative rotation of the inner and outer cap sections during tightening rotation, and a depressable push button element on the outer cap section including a depending lug adapted to ride on said ramp and adapted when the push button element is depressed to contact said unscrewing abutment surface.
- 2. A push button child-resistant closure cap for containers as defined in claim 1, and snap lock detent means on the outer cap section restraining the depressable push button element releasably in depressed and raised positions, the holding power of the detent means being overcome by the pressure of said depending lug riding on one inclined surface of said ramp during closure cap tightening.
- 3. A push button child-resistant closure cap for containers as defined in claim 1, and the top of said unscrewing abutment surface being at a lower level on the inner cap section than the top of said ramp, said ramp being annular between said inclined surfaces thereof, the first stage tightening abutment surface of the inner cap section comprising a radial surface interiorly of the annular ramp and the second stage tightening abutment surface and the unscrewing abutment surface comprising radial surfaces exteriorly of said ramp.
- 4. A push button child-resistant closure cap for containers as defined in claim 1, and the first stage tightening lug of the outer cap section comprising a shallow lug adapted to escape over the top of the first stage tightening abutment surface of the inner cap section following development of a predetermined pressure between the shallow lug and said first stage abutment surface, thereby allowing the second stage tightening lug of the outer cap section to strike the second stage abutment surface of the inner cap section with momentum in the second stage tightening process for the closure cap, and the depressed push button element moving to its raised position substantially simultaneously with the escapement of said shallow lug over said first stage tightening abutment surface thereby indicating a child-resistant state for the closure cap.
- 5. A push button child-resistant closure cap for containers as defined in claim 1, and said push button element being disposed within a well formed in the top of the outer cap section, and the bottom wall of said well having a slot through which the depending lug of the push button element projects movably.
- 6. A push button child-resistant closure cap for containers as defined in claim 5, and the second stage tightening lug of the outer cap section being fixed on the lower surface of the bottom wall of said well close to one side of said slot in said bottom wall.
- 7. A push button child-resistant closure cap for containers as defined in claim 1, and a seal element within the inner cap section to engage and seal the mouth of a container at least when the first stage of closure cap tightening is complete.
- 8. A push button child-resistant closure cap for containers as defined in claim 5, and snap lock detent elements for said push button element on side wall portions of the well at two elevations.
- 9. A push button child-resistant closure cap for containers as defined in claim 1, and an inclined ramp surface on the top wall of the inner cap section outwardly of one inclined surface of said ramp and having the same degree of inclination and the same elevation as said one inclined surface of the ramp and being located between said unscrewing abutment surface and second stage tightening abutment surface of the inner cap section.
- 10. A push button child-resistant closure cap for containers as defined in claim 9, and the first and second stage tightening abutment surfaces of the inner cap section being circumferentially spaced slightly less than 180 degrees, the first and second stage tightening lugs of the outer cap section being similarly spaced on the depending lug of said push button element being closely adjacent to one side of the second stage tightening lug of the outer cap section.
- 11. A push button child-resistant cap for containers of harmful substances comprising inner and outer relatively rotatable interengaged cap sections, the inner cap section being screw-threaded for engagement with container screw-threads and being adapted to seal the mouth of the container, the inner cap section having circumferentially spaced first and second stage tightening abutment surfaces and an unscrewing abutment surface and having inclined ramp means on its top extending to an elevation above the top of the unscrewing abutment surface, a pair of circumferentially spaced first and second stage tightening lugs on the outer cap section adapted sequentially to engage the first and second stage tightening abutment surfaces of the inner cap section, the first stage tightening lug adapted in response to a build-up of resistance to tightening to escape over the top of the first stage tightening abutment surface, whereby the second stage tightening lug will impact with momentum on the second stage tightening abutment surface of the inner cap section, and a depressable push button element on the outer cap section including a depending drive lug adapted to engage said unscrewing abutment surface and also adapted to ride on said inclined ramp means, whereby the latter will cause the push button element to be elevated substantially at the instant of the escapement of the first stage tightening lug over the top of the first stage tightening abutment surface.
- 12. A push button child-resistant cap for containers comprising inner and outer relatively rotatable interengaged cap sections, the inner cap section being screw-threaded to engage container screw-threads, the inner cap section having circumferentially spaced first and second stage tightening abutment surfaces on the top thereof and an unscrewing abutment surface, a tightening lug on the outer cap section adapted to engage the first stage tightening abutment surface of the inner cap section and adapted to escape over the top of such abutment surface after a certain build-up of resistance to cap tightening, a depressable push button element on the outer cap section including a drive lug adapted to engage said unscrewing abutment surface when the push button element is depressed, and camming means on the top of the inner cap section engageable with said drive lug of the push button element to elevate the push button element substantially at the time of the escapement of said tightening lug over the top of said first stage tightening abutment surface.
- 13. A push button child-resistant cap for containers comprising inner and outer relatively rotatable cap sections, the inner cap section being screw-threaded to engage container screw-threads, the inner cap section having circumferentially spaced first and second stage tightening surfaces thereon and an unscrewing surface, at least one tightening lug on the outer cap section engageable at least with the first stage tightening surface of the inner cap section during relative rotation between the two cap sections, said tightening lug being adapted to escape over the first stage tightening surface following a certain build-up of resistance to cap tightening, a depressable push button element on the outer cap section including a drive lug adapted to engage the unscrewing surface of the inner cap section while the push button element is depressed to cause unscrewing of the inner cap section, and camming means on the inner cap section engageable with said drive lug to elevate the push button element during tightening rotation of the cap.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of prior copending application Ser. No. 074,780, filed Sept. 12, 1979, for PUSH BUTTON SAFETY CAP FOR GLASS BOTTLES, now U.S. Pat. No. 4,223,794.
US Referenced Citations (4)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
74780 |
Sep 1979 |
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