CA1038804A - Child proof closure - Google Patents
Child proof closureInfo
- Publication number
- CA1038804A CA1038804A CA254,293A CA254293A CA1038804A CA 1038804 A CA1038804 A CA 1038804A CA 254293 A CA254293 A CA 254293A CA 1038804 A CA1038804 A CA 1038804A
- Authority
- CA
- Canada
- Prior art keywords
- cap
- teeth
- drive member
- child proof
- turning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Closures For Containers (AREA)
Abstract
CHILD PROOF CLOSURE
Abstract of the Disclosure A child proof closure for containers having a threaded neck. A screw type cap has a first set of teeth mounted on its side the teeth being set at an angle to the axis of the cap. A drive member is loosely mounted on the cap for limited axial motion. A second set of teeth is mounted on said drive member, the teeth being angled in the same direction as the first set of teeth. When said drive member is turned in the direction to remove the cap, the interaction of said teeth lifts the drive member relative to the cap and the first and second sets of teeth dis-engage so that the cap cannot be removed solely by turning.
Abstract of the Disclosure A child proof closure for containers having a threaded neck. A screw type cap has a first set of teeth mounted on its side the teeth being set at an angle to the axis of the cap. A drive member is loosely mounted on the cap for limited axial motion. A second set of teeth is mounted on said drive member, the teeth being angled in the same direction as the first set of teeth. When said drive member is turned in the direction to remove the cap, the interaction of said teeth lifts the drive member relative to the cap and the first and second sets of teeth dis-engage so that the cap cannot be removed solely by turning.
Description
~38~
~, This application is an iMprovement of my prior appli-cation, Ser. No. 235,o78, filed September 9~ 1975, for Child Proof Closure, now Canadian Patent 1,027,57~, granted May ~,1978 This invention relates to child proo~ closures for containers containing medicines,poi~ris and corrosive sub-stances or liquids.
This inventi~n provides a cap means which must be pressed down and turnedin order to remove the cap. This in-vention is preferably made from plastic.
.
In my prior application, the drive member fit over the top portion of the cap. In this invention, the drive member fits over the entire cap. This provides a longer side wall with great flexibility and is more suitable for plastlc construction.
Accordingly, a principal object of the invention is to provide new and improved means for child proof closures for -containers.
Another object of the invention is to provide new and improved means for child proof closures for containers of the type having a threaded neck.
Another obJect of the invention is to provide new and improved screw type closures for containers such as bottles which require simultaneous pressing and turning in order to unscrew the cap Another object of the invention is to provide a new and improved screw type cap having a drive member loosely mounted on the cap wherein both the cap and the drive member have teeth which must be engaged by ~irmly pressing the drive member onto the cap and simultaneously turning in order 3~ to unscrew the cap~ ~
~,` :..
~..J~
- - 2 _ 15)3B~'D4 Another object of the invention is to provide new and improved child proof closure ~eans for containers having a threaded neck comprising, a screw type cap having a lower outwardly extending lip, a first set of teeth ~n the side of said cap, said teeth being set at an angle to the axis of said cap, a drive member loosely mounted on said cap for limited axial motion, said drive member having an interior - slot around its lower periphery said slot engaging said lip so as to permit axial movement ~f said drive member on said cap, a second set of teeth on said drive member, said teeth being angled ln the same direction as said first set of tee~h, whereby when said drive member is turned in the di-rect~on to remove the cap, the interaction of said tee~h lift~ the drive membar relative to the cap and the first and second sets of teeth disengage so th~t the cap cannot be removed solely by turning.
These and other objects of the invention will be apparent from the following specification and drawings o which:
Figure 1 ~5' a side view of an embodiment of the invention partially in section, in free position.
Figure 2 is a side view of the embodiment of Figure 1, partially in section, inengaged position.
Figure 3 is a side view of the drive member of Figure 1.
Referring to the Figures, the cap 1 is a screw type cap which is adapted to be screwed onto a container such as medicine bottles, of the type which have a threaded neck. The cap is conventional except for two features.
First the cap has a plurality ~f teeth 2 "~:hich are ~o~m ted 1~3B8f~4 on the upper side of the cap, and secondly, t'n~ cap h~s an annular lip 4~ on the lower periphery, one ~urpose of which is to loosely retain the drive r.1ember 5~ on cap 1. The tee~h 2, ~ave an angle t~ the axis of the cap in the neigh-borhood of 45 to ~0.
. The drive member 5, has an interior lower slot o, which is adaptad- to fit onto the lip 4, so as to hold the drive member on the cap, but free to moYe axiably and ro-tatably. The drive member has a circle ~f teeth 7~ on the interior of its upper surface which are adapted to mate with the teeth 2, of the cap 1, wnen the drive member is .
pressed on the capO
The teeth 7, have an angle to the axis equal to that of the angle o~ the teeth 2. Tne direction o:~ the an~le is chosen 50 that the lower edges o~ the teeth le~d ln the . direction that the cap is turned to apply it. When the drive member is turned clock~ise to apply the cap, then the first and second sets of teeth, 2 and 7, lock together.
- on the other hand, when the drive member is turned counterclockwise, in the direction to remove the cap with-out pressing, the interaction of the teeth causes the drive member to lift away from the cap so that the teeth are not engaged but the drive member teeth slip over the cap teeth~
There is su~ficient play in the mounting of the drive member between lip and slot o, .to accommodate this axial. motion of . .
the drive member.
When it is desirad ~o ramove the cap, the drive member is pressed down ~irmly onto the cap and rotated counter-clockwise~ The pressing will cause the first and second sets o~ teeth 2 and 7, to remain in contact so that by simultaneously pressing and turning counterclockwise the ~3~8~4 - cap can be removed. The teeth are not formed with square cross-sections but are of a curved cross-section so that a first pressing is required to keep tha teeth in contact for the purpose of removing the cap.
The drive member is mounted on the cap and the dimensions are such that ths drive member is retained loosely on the cap so that it can be easily ~urned without turning.the cap as shown in Figure 1.
Therefore, a child merely turning the drive mem-bsr will not unscrew the cap. The teeth are pointed or beveled with rounded edges so that a ~irm pressure is re- .
quired to hold them into engagement when unscrewing the cap.
It is unlikely that a small child would be able to appreciate that it is necessary to press and turn simulta-neoulsy to unscrew the cap Furthermore, since the teeth are.not square, a small child would not have sufficient strength to hold the teeth ~n engagement while unscrewing the cap. - :
The cap and drive member are preferably made of molded plastic. The drive mamber has sufficient flexibility , to that it may be snapped into position on the cap and thereafter cannot be removed~
.,,, ' .
~, This application is an iMprovement of my prior appli-cation, Ser. No. 235,o78, filed September 9~ 1975, for Child Proof Closure, now Canadian Patent 1,027,57~, granted May ~,1978 This invention relates to child proo~ closures for containers containing medicines,poi~ris and corrosive sub-stances or liquids.
This inventi~n provides a cap means which must be pressed down and turnedin order to remove the cap. This in-vention is preferably made from plastic.
.
In my prior application, the drive member fit over the top portion of the cap. In this invention, the drive member fits over the entire cap. This provides a longer side wall with great flexibility and is more suitable for plastlc construction.
Accordingly, a principal object of the invention is to provide new and improved means for child proof closures for -containers.
Another object of the invention is to provide new and improved means for child proof closures for containers of the type having a threaded neck.
Another obJect of the invention is to provide new and improved screw type closures for containers such as bottles which require simultaneous pressing and turning in order to unscrew the cap Another object of the invention is to provide a new and improved screw type cap having a drive member loosely mounted on the cap wherein both the cap and the drive member have teeth which must be engaged by ~irmly pressing the drive member onto the cap and simultaneously turning in order 3~ to unscrew the cap~ ~
~,` :..
~..J~
- - 2 _ 15)3B~'D4 Another object of the invention is to provide new and improved child proof closure ~eans for containers having a threaded neck comprising, a screw type cap having a lower outwardly extending lip, a first set of teeth ~n the side of said cap, said teeth being set at an angle to the axis of said cap, a drive member loosely mounted on said cap for limited axial motion, said drive member having an interior - slot around its lower periphery said slot engaging said lip so as to permit axial movement ~f said drive member on said cap, a second set of teeth on said drive member, said teeth being angled ln the same direction as said first set of tee~h, whereby when said drive member is turned in the di-rect~on to remove the cap, the interaction of said tee~h lift~ the drive membar relative to the cap and the first and second sets of teeth disengage so th~t the cap cannot be removed solely by turning.
These and other objects of the invention will be apparent from the following specification and drawings o which:
Figure 1 ~5' a side view of an embodiment of the invention partially in section, in free position.
Figure 2 is a side view of the embodiment of Figure 1, partially in section, inengaged position.
Figure 3 is a side view of the drive member of Figure 1.
Referring to the Figures, the cap 1 is a screw type cap which is adapted to be screwed onto a container such as medicine bottles, of the type which have a threaded neck. The cap is conventional except for two features.
First the cap has a plurality ~f teeth 2 "~:hich are ~o~m ted 1~3B8f~4 on the upper side of the cap, and secondly, t'n~ cap h~s an annular lip 4~ on the lower periphery, one ~urpose of which is to loosely retain the drive r.1ember 5~ on cap 1. The tee~h 2, ~ave an angle t~ the axis of the cap in the neigh-borhood of 45 to ~0.
. The drive member 5, has an interior lower slot o, which is adaptad- to fit onto the lip 4, so as to hold the drive member on the cap, but free to moYe axiably and ro-tatably. The drive member has a circle ~f teeth 7~ on the interior of its upper surface which are adapted to mate with the teeth 2, of the cap 1, wnen the drive member is .
pressed on the capO
The teeth 7, have an angle to the axis equal to that of the angle o~ the teeth 2. Tne direction o:~ the an~le is chosen 50 that the lower edges o~ the teeth le~d ln the . direction that the cap is turned to apply it. When the drive member is turned clock~ise to apply the cap, then the first and second sets of teeth, 2 and 7, lock together.
- on the other hand, when the drive member is turned counterclockwise, in the direction to remove the cap with-out pressing, the interaction of the teeth causes the drive member to lift away from the cap so that the teeth are not engaged but the drive member teeth slip over the cap teeth~
There is su~ficient play in the mounting of the drive member between lip and slot o, .to accommodate this axial. motion of . .
the drive member.
When it is desirad ~o ramove the cap, the drive member is pressed down ~irmly onto the cap and rotated counter-clockwise~ The pressing will cause the first and second sets o~ teeth 2 and 7, to remain in contact so that by simultaneously pressing and turning counterclockwise the ~3~8~4 - cap can be removed. The teeth are not formed with square cross-sections but are of a curved cross-section so that a first pressing is required to keep tha teeth in contact for the purpose of removing the cap.
The drive member is mounted on the cap and the dimensions are such that ths drive member is retained loosely on the cap so that it can be easily ~urned without turning.the cap as shown in Figure 1.
Therefore, a child merely turning the drive mem-bsr will not unscrew the cap. The teeth are pointed or beveled with rounded edges so that a ~irm pressure is re- .
quired to hold them into engagement when unscrewing the cap.
It is unlikely that a small child would be able to appreciate that it is necessary to press and turn simulta-neoulsy to unscrew the cap Furthermore, since the teeth are.not square, a small child would not have sufficient strength to hold the teeth ~n engagement while unscrewing the cap. - :
The cap and drive member are preferably made of molded plastic. The drive mamber has sufficient flexibility , to that it may be snapped into position on the cap and thereafter cannot be removed~
.,,, ' .
Claims (2)
1. A child proof closure for containers having a threaded neck comprising:
a screw type cap, having a lower outwardly ex-tending lip, a first set of teeth on the side of said cap, said teeth being set at an angle to the axis of said cap, a drive member loosely mounted on said cap for limited axial motion, said drive member having an interior slot around its lower periphery said slot engaging said lip so as to permit axial movement of said drive member on said cap, a second set of teeth in said drive member, said teeth being angled in the same direction as said first set of teeth, whereby when said drive member is turned in the direction to remove the cap, the interaction of said teeth lifts the drive member relative to the cap and the first and second sets of teeth disengage so that the cap cannot be removed solely by turning.
a screw type cap, having a lower outwardly ex-tending lip, a first set of teeth on the side of said cap, said teeth being set at an angle to the axis of said cap, a drive member loosely mounted on said cap for limited axial motion, said drive member having an interior slot around its lower periphery said slot engaging said lip so as to permit axial movement of said drive member on said cap, a second set of teeth in said drive member, said teeth being angled in the same direction as said first set of teeth, whereby when said drive member is turned in the direction to remove the cap, the interaction of said teeth lifts the drive member relative to the cap and the first and second sets of teeth disengage so that the cap cannot be removed solely by turning.
2. Apparatus as in Claim 1, wherein said first and second sets of teeth are set at an angle to the axis of said cap so that the leading lower edges of the teeth are in the direction of turning said cap to apply the cap to the container.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/584,735 US3946890A (en) | 1975-02-11 | 1975-06-09 | Child proof closure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1038804A true CA1038804A (en) | 1978-09-19 |
Family
ID=24338572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA254,293A Expired CA1038804A (en) | 1975-06-09 | 1976-06-08 | Child proof closure |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1038804A (en) |
-
1976
- 1976-06-08 CA CA254,293A patent/CA1038804A/en not_active Expired
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