U.S. patent number 3,703,975 [Application Number 05/047,869] was granted by the patent office on 1972-11-28 for safety closure.
Invention is credited to William C. Wittemer.
United States Patent |
3,703,975 |
Wittemer |
November 28, 1972 |
SAFETY CLOSURE
Abstract
A safety closure consisting of a container and a cap comprising
a core and flexible deformable base having a downwardly opening
chamber enclosing the container mouth and an upwardly opening
chamber to receive the core; the core is moveable relative to the
core receiving chamber between a lock position interfering with
certain inward deformation of the base, and an unlock position not
interfering with such inward deformation of the base; when the core
is in the unlock position, the base may be deformed inwardly to
retract certain radial projections on the base from corresponding
radial recessions in the container to permit removal of the base
from the container -- such projections, when fitted in said
recessions, normally prevent removal of the base; and, in one
embodiment, the base having one upwardly inclined surface defining
the inner surface which, when pressure is applied to the outside of
the base adjacent such surface, tends to force the core upwardly
out of the base; and, in other embodiments, various other core
designs requiring different core removal.
Inventors: |
Wittemer; William C. (Maple
Heights, OH) |
Family
ID: |
21951465 |
Appl.
No.: |
05/047,869 |
Filed: |
June 19, 1970 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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807326 |
Mar 14, 1969 |
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Current U.S.
Class: |
215/213; 215/215;
220/212.5; 215/211; 215/216 |
Current CPC
Class: |
G11C
11/24 (20130101); G11C 11/40 (20130101); B65D
50/067 (20130101); H03M 7/00 (20130101) |
Current International
Class: |
G11C
11/24 (20060101); G11C 11/40 (20060101); B65D
50/06 (20060101); B65D 50/00 (20060101); H03M
7/00 (20060101); G11C 11/21 (20060101); B65d
021/00 () |
Field of
Search: |
;215/9,41C
;220/6A,94A,24.5,47 ;229/43 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Hall; George T.
Parent Case Text
BACKGROUND AND SUMMARY OF THE INVENTION
This is a continuation-in-part of application Ser. No. 807,326,
filed Mar. 14, 1969, now abandoned.
Claims
Having thus described my invention, I claim:
1. A cap adapted for closure of the opening of a container which
has a neck portion with the container opening formed therein, said
cap comprising
a unitary deformable base comprising a lower skirt portion forming
a downwardly opening first chamber to receive the container neck
and an upper wall portion forming an upwardly opening second
chamber to receive a core, said skirt portion having a neck
engaging portion which, when the neck is received in said neck
receiving chamber, engages the neck to prevent removal of said base
from the neck, said upper wall portion having a finger engaging
surface located directly above said neck engaging portion, said
base deformable to assume a release configuration in response to
inwardly directed pressure applied to said finger engaging surface
to deform said finger engaging surface substantially toward the
center of said core receiving chamber thereby deforming said neck
engaging portion of said skirt portion in a direction away from the
center of said neck receiving chamber, so that when the container
neck is received in said neck receiving chamber, deformation of
said base to assume said release configuration disengages said neck
engaging portion from said container neck to permit removal of said
base therefrom, a core movable relative to said core receiving
chamber between a lock position and an unlock position; and said
lock position characterized by location of said core within said
core chamber in a position obstructing substantial inward
deformation of said wall portion at said finger engaging surface so
that said base may not be deformed to assume said release
configuration, and said unlock position characterized by location
of said core in a position not obstructing substantial inward
deformation of said wall portion at said finger engaging surface so
that said base may be deformed to assume said release
configuration.
2. A cap as recited in claim 1 wherein said core has an offset
portion and is rotatable within said core receiving chamber of said
base between said lock and said unlock positions, said offset
portion of said core aligned adjacent said finger engaging surface
of said wall portion of said base when said core is in said unlock
position.
3. A cap as recited in claim 1 wherein said core is at least
partially withdrawn from said core receiving chamber of said base
in said unlock position.
4. A cap as recited in claim 3 wherein the outer surface of said
core and the inner surface of said side wall portions are
correspondingly helically threaded so that said core may be moved
between said lock and unlock position by screw motion.
5. A cap as recited in claim 3 wherein said closure member has at
least one flange portion projecting into said core receiving
chamber from said upper wall and wherein said core has at least one
flange portion projecting outwardly and located beneath said base
flange when said core is in lock position so that said core and
base are interlocked at said flange portions when said core is in
said lock position.
6. A cap as recited in claim 5 wherein said base flange extends
about only a portion of the interior surface of said upper wall of
said base; wherein said core flange extends about only a portion of
the outer surface of said core; and wherein said core is rotatable
within said core chamber between said lock position and an
intermediate position, said intermediate position characterized by
said core flange, not being beneath said base flange so that said
core may be withdrawn from said base to assume said unlock
position.
7. A cap as recited in claim 5 wherein said cap is deformable in
the interlocking region of said base flange and core flange so that
said core may be snap-fitted into said lock position, said core
movable between said lock and said unlock positions only by
deformation of said cap in said interlocking region.
8. A cap as recited in claim 3 wherein said cap further comprises
means connecting said core to said base when said core is in said
unlock position.
9. A cap adapted for closure of the opening of a container which
has a neck portion with the container opening formed therein, said
neck provided with a radially outwardly projecting lip portion,
said cap comprising
a unitary deformable base comprising a central transverse web
portion a lower skirt portion extending downwardly from said
transverse web portion to form a downwardly opening first chamber
for receiving the container neck, and an upper wall portion
extending upwardly from said transverse web portion to form an
upwardly opening second chamber for receiving a core, said skirt
portion having a radially inwardly projecting rib adapted to extend
beneath the outwardly projecting lip portion of the container to
prevent removal of said base from the container neck, said upper
wall portion having a finger engaging surface located directly
above said inwardly projecting rib, said base deformable to assume
a release configuration in response to inwardly directed pressure
applied to said finger engaging surface to deform said finger
engaging surface substantially inwardly thereby deforming said
skirt portion to move said inwardly projecting rib outwardly so
that when said container neck is received in said neck receiving
chamber, deformation of said base to assume said release
configuration withdraws said inwardly projecting rib from beneath
said outwardly projecting lip portion to permit removal of said
base from said container; and
a core movable relative to said core receiving chamber between a
lock position and an unlock position, said lock position
characterized by location of said core within said core chamber in
a position obstructing substantial inward deformation of said wall
portion at said finger engaging surface so that said base may not
be deformed to assume said release configuration, and said unlock
position characterized by location of said core in a position not
obstructing substantial inward deformation of said wall portion at
said finger engaging surface so that said base may be deformed to
assume said release configuration.
10. A cap as recited in claim 9 wherein said core has an offset
portion and is rotatable within said core receiving chamber of said
base between said lock and said unlock positions, said offset
portion of said core aligned adjacent said finger engaging surface
of said wall portion of said base when said core is in said unlock
position.
11. A cap as recited in claim 9 wherein said core is at least
partially withdrawn from said core receiving chamber at said base
in said unlock position.
12. A cap as recited in claim 11 wherein the outer surface of said
core and the inner surface of said side wall portions are
correspondingly helically threaded so that said core may be moved
between said lock and unlock positions by screw motion.
13. A cap as recited in claim 11 wherein said base has at least one
flange portion projecting into said core receiving chamber from
said upper wall and wherein said core has at least one flange
portion projecting outwardly and located beneath said base flange
when said core is in lock position so that said core and base are
interlocked at said flange portions when said core is in said lock
position.
14. A cap as recited in claim 13 wherein said base flange extends
about only a portion of the interior surface of said upper wall of
said base; wherein said core flange extends about only a portion of
the outer surface of said core; and wherein said core is rotatable
within said core chamber between said lock position and an
intermediate position, said intermediate position characterized by
said core flange not being beneath said base flange so that said
core may be withdrawn from said base to assume said unlock
position.
15. A cap as recited in claim 13 wherein said cap is deformable in
the interlocking region of said base flange and core flange so that
said core may be snap-fitted into said lock position, said core
movable between said lock and said unlock positions only by
deformation of said cap in said interlocking region.
16. A cap as recited in claim 11 wherein said cap further comprises
means connecting said core to said base when said core is in said
unlock position.
17. A cap as recited in claim 16 wherein said connecting means is
integrally formed with said core, projecting from the lower surface
thereof and comprising a narrow elongated body portion and an
enlarged tip; and wherein an aperture is formed in the said
transverse portion to slidingly receive said connecting means, said
aperture being smaller than the tip of said connecting means to
anchor said connecting means therein.
18. A closure comprising the combination of the cap and container
recited in claim 9.
19. A cap and container combination where the container has a
cavity with the opening to the container cavity formed in a
container neck portion, and wherein the improvement comprises a cap
comprising
a unitary deformable base comprising a lower skirt portion forming
a first upwardly opening chamber to receive the container neck and
an upper wall portion forming a second downwardly opening chamber
for receiving a core, said skirt portion having a neck engaging
portion which, when the neck is received in said neck receiving
chamber, engages the neck to prevent removal of said base from the
neck, said upper wall portion having a finger engaging surface
located directly above said neck engaging portion, said base
deformable to assume a release configuration in response to
inwardly directed pressure applied to said finger engaging surface
to deform said finger engaging surface substantially toward the
center of said core receiving chamber thereby deforming said neck
engaging portion of said skirt portion in a direction away from the
center of said neck receiving chamber so that said neck engaging
portion is disengaged from said container neck to permit removal of
said base from said container; and
a core movable relative to said core receiving chamber between a
lock position and an unlock position, said lock position
characterized by location of said core within said core chamber in
a position obstructing substantial inward deformation of said wall
portion at said finger engaging surface so that said base may not
be deformed to assume said release configuration, and said unlock
position characterized by location of said core in a position not
obstructing substantial inward deformation of said wall portion at
said finger engaging surface so that said base may be deformed to
assume said release configuration.
20. A closure as recited in claim 19 wherein said core has an
offset portion and is rotatable within said core receiving chamber
of said base between said lock and said unlock positions, said
offset portion of said core aligned adjacent said finger engaging
portion of said wall portion of said base when said core is in said
unlock position.
21. A closure as recited in claim 19 wherein said core is at least
partially withdrawn from said core receiving chamber of said base
in said unlock position.
22. A closure as recited in claim 21 wherein said cap further
comprises means connecting said core to said base when said core is
in said unlock position.
23. A closure comprising a cap and a container in combination,
where the container has a cavity with the opening to the container
cavity formed in a neck portion, and where the improvement
comprises
a lip portion projecting outwardly from said neck portion of said
container; and
a cap comprising a unitary deformable base comprising a central
transverse web portion, a lower skirt portion extending downwardly
from said portion to form a first downwardly opening chamber
enclosing the container neck, and an upper wall portion extending
upwardly from said web portion to form a second upwardly opening
chamber for receiving a core, said skirt portion having an inwardly
projecting rib extending beneath the outwardly projecting lip
portion of the container to prevent removal of said base from the
container neck, said upper wall portion having a finger engaging
surface located directly above said inwardly projecting rib, said
base deformable to assume a release configuration in response to
inwardly directed pressure applied to said finger engaging surface
to deform said finger engaging surface substantially inwardly
thereby deforming said skirt portion to move said inwardly
projecting rib outwardly, so that said inwardly projecting rib is
withdrawn from beneath said outwardly projecting lip portion to
permit removal of said base from said container; and a core movable
relative to said core receiving chamber between a lock position and
an unlock position, said lock position characterized by location of
said core within said core chamber in a position obstructing
substantial inward deformation of said wall portion at said finger
engaging surface so that said base may not be deformed to assume
said release configuration, and said unlock position characterized
by location of said core in a position not obstructing substantial
inward deformation of said wall portion at said finger engaging
surface so that said base may be deformed to assume said release
configuration.
24. A closure comprising
a container provided with a radial recession at the container
mouth; and
a cap comprising a base having a downwardly opening first chamber
enclosing the container mouth, an upwardly opening second chamber,
and a radially projecting portion locating in said radial recession
in said container tending to prevent removal of said base from said
container, said base deformable to assume a release configuration
in response to pressure applied radially inwardly at the side of
said base above said container, said base deformable to assume a
release configuration in response to pressure applied radially
inwardly at the side of said base above said container, said
release configuration characterized in that said radially
projecting portion is retracted from said radial recession to
permit removal of said base from said container, and
a core movable relative to said second chamber between a lock
position and an unlock position, said lock position characterized
by location of said core within said second chamber in a position
obstructing deformation of said base to assume said release
configuration, and said unlock position characterized by location
of said core in a position not obstructing deformation of said base
to assume said release configuration.
25. A closure comprising
a container provided with a radial recession on its inner surface
at the container mouth; and
a cap comprising a base having a downwardly opening first chamber
enclosing the container mouth, an upwardly opening second chamber,
and a radially projecting portion locating in said radial recession
in said container tending to prevent removal of said base from said
container, said base deformable to assume a release configuration
in response to pressure applied radially inwardly at the side of
said base above said container, said release configuration
characterized in that said radially projecting portion is retracted
from said radial recession to permit removal of said base from said
container; a core removably pop-fitted in said second chamber to
obstruct deformation of said base to assume said release
configuration so that when said pop-fitted base is removed from
said second chamber, said core does not obstruct deformation of
said base to assume said release configuration; and a flexible tab
integrally connecting one side of said core to one side of said
base.
26. A closure as recited in claim 25 wherein said core is provided
with a narrow upwardly opening aperture in said core for receiving
a prying tool for use in removal of said core from said second
chamber.
27. A closure as recited in claim 25 wherein said base is provided
with a generally upwardly facing inclined surface forming at least
a portion of the side wall surface defining said second chamber, so
that when radially inwardly directed pressure is applied to the
outer side surface of said base adjacent said inclined surface,
said inclined surface tends to force said core upwardly out of said
second chamber to facilitate removal of said core from said second
chamber.
28. A closure as recited in claim 27 wherein said core is provided
with a generally downwardly facing inclined side surface adjacent
said upwardly facing inclined surface on said base; wherein said
core is further provided with a narrow offset seat directly above
said inclined core side surface; and wherein said base is provided
with a narrow radially inwardly projecting lip portion fitting said
narrow offset seat on said core.
29. A closure comprising
a container provided with a radial recession on its inner surface
at the container mouth; and
a cap comprising a base having a downwardly opening annular first
chamber enclosing the container mouth, an upwardly opening second
chamber having a lower generally cylindrical portion locating in
the center of said annular first chamber and an enlarged upper
portion and a radially projecting portion locating in said radial
recession in said container tending to prevent removal of said base
from said container, said base deformable to assume a release
configuration in response to pressure applied radially inwardly at
the side of said base above said container, said release
configuration characterized in that said radially projecting
portion is retracted from said radial recession to permit removal
of said base from said container; a core removably pop-fitted in
said second chamber to obstruct deformation of said base to assume
said release configuration so that when said pop-fitted base is
removed from said second chamber, said core does not obstruct
deformation of said base to assume core does not obstruct
deformation of said base to assume said release configuration; and
a flexible tab integrally connecting one side of said core to one
side of said base.
30. A closure as recited in claim 29 wherein said core is provided
with a narrow upwardly opening aperture in said core for receiving
a prying tool for use in removal of said core from said second
chamber.
31. A closure as recited in claim 29 wherein said base is provided
with a generally upwardly facing inclined surface forming at least
a portion of the side wall surface defining said upper second
chamber portion so that when radially inwardly directed pressure is
applied to the outer side surface of said base adjacent said
inclined side surface, said inclined surface tends to force said
core upwardly out of said second chamber to facilitate removal of
said core from said second chamber.
32. A closure as recited in claim 31 wherein said core is provided
with a generally downwardly facing inclined side surface adjacent
said upwardly facing inclined surface on said base; wherein said
core is further provided with a narrow offset seat directly above
said inclined core side surface; and wherein said base is provided
with a narrow radially inwardly projecting lip portion fitting said
narrow offset seat on said core.
33. A closure as recited in claim 26 wherein said core is removably
pop-fitted in said second chamber.
34. A closure as recited in claim 27 wherein said core is removably
pop-fitted in said second chamber.
35. A closure as recited in claim 28 wherein said core is removably
pop-fitted in said second chamber.
36. A closure as recited in claim 28 wherein said core is provided
with a radial projection and said base is provided with a radial
recession receiving said radial projection on said core to maintain
said core removably pop-fitted in said second chamber.
37. A closure as recited in claim 29 wherein said core is provided
with a radial projection and said base is provided with a radial
recession receiving said radial projection on said core to maintain
said core removably pop-fitted in said second chamber.
Description
This invention relates to safety closures and to safety caps for
safety closures, and more particularly to safety closures and
safety caps therefor for holding medicines, drugs or the like which
are difficult for small children to open.
In the past, safety closures for drugs and the like have been
physically difficult to open so that even though children could not
open them, they were also quite difficult for an adult to open, and
often impossible for a person with arthritis for instance.
Other safety closures have been easier to operate and yet, while
children have been unable to open them, the cost of manufacturing
such closures has been relatively great and they have not been
acceptable to industry as a result.
The object of this invention is to provide a safety closure which
cannot be readily opened by small children, so that when the unit
is used for holding dangerous substances, such as drugs or
medicines, there will be less liklihood of children gaining access
to them.
Another object of the invention is to provide safety closures
wherein the procedure employed to remove the cap is not obvious and
thereby reduces the possibility of children opening or removing the
cap.
A further object of the invention is to provide a safety closure
wherein at least two separate steps must be following in order to
remove the cap from the container thereby making the procedure for
removing the cap from the container relatively unobvious to small
children.
A still further object of the invention is to provide a safety
closure wherein the cap is easy to remove from the container if the
method of doing so is known to the user but difficult to remove if
the method is unknown.
A still further object of the invention is to provide a safety
closure which is inexpensive to manufacture.
A still further object of the invention is to provide a safety
closure wherein the cap cannot be forced from the container by a
child.
Yet another object of the present invention is to provide a safety
closure which can be manufactured in one piece to facilitate
assembly during production and maintain costs within acceptable
limits.
These and other objects and advantages of the present invention
will be apparent during the course of the following
description.
In the accompanying drawings where like numerals are used to
designate like parts throughout the same:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of one embodiment of a safety cap and
container in accordance with the principles of the present
invention, showing the cap's central core in its "lock"
position.
FIG. 2 is a perspective view of the safety cap and container of
FIG. 1, but showing the cap's central core rotated through
90.degree. to its "unlock" position.
FIG. 3 is an elevational view of the safety cap and container of
FIG. 1 with parts broken away and shown in section, showing the
cap's central core in its lock position.
FIG. 4 is an elevational view of the safety cap and container of
FIG. 1 with parts broken away and shown in section, showing the
cap's central core in its unlock position.
FIG. 5 is an elevational view of the safety cap and container of
FIG. 1 with parts broken away and shown in section, and
illustrating how, when the cap's central core is in unlock
position, the cap may be manually deformed for removal from the
container.
FIG. 6 is an exploded perspective view of the safety cap of FIG.
1.
FIG. 7 is an elevational view of a further embodiment of a safety
cap and container in accordance with the present invention with
parts broken away and shown in section, and showing the cap's
central core in lock position.
FIG. 8 is a sectional elevational view of the cap of FIG. 7,
showing the cap's central core in unlock position.
FIG. 9 is a perspective exploded view of the cap of FIG. 7.
FIG. 10 is an elevational view, with parts broken away and shown in
section, of a further embodiment of a safety cap in accordance with
the principles of the present invention, showing the central core
in lock position.
FIG. 11 is a partially sectioned view of the cap of FIG. 10,
showing the central core in unlock position.
FIG. 12 is a plan view of the cap of FIG. 10, showing the central
core in its lock position.
FIG. 13 is an elevational sectioned view of a further embodiment of
a safety cap in accordance with the principles of the present
invention, showing the central core in the lock position.
FIG. 14 is a partially sectioned view of the cap of FIG. 13,
showing the central core being removed from its lock position to
unlock the cap.
FIG. 15 is an elevational view in section of a further embodiment
of a safety cap in accordance with the principles of the present
invention, showing the central core in lock position.
FIG. 16 is a plan view of the cap of FIG. 15, with the central core
in lock position.
FIG. 17 is an elevational view, with parts broken away and shown in
section, of a further embodiment of a safety container and cap in
accordance with the present invention, wherein the core portion is
hinged to the base portion, and showing the core in its unlocked
position.
FIG. 18 is a sectional elevational side view of the cap and a
portion of the container of FIG. 17, showing the cap's core in its
lock position.
FIG. 19 is a plan view of the cap shown in FIG. 17.
FIG. 20 is a sectional end view of the cap and container taken
along the lines 20--20 of FIG. 19.
FIG. 21 is a side elevational view, with parts broken away and
shown in section, of a further embodiment of a safety closure in
accordance with the principles of the present invention, wherein
the core is hinged to the base and wherein the core is provided
with an annular rim to provide a snap fit of the core within the
base, showing the core in its unlock position.
FIG. 22 is a side elevational view, with parts broken away and
shown in section, of a further embodiment of a safety closure in
accordance with the principles of the present invention, wherein
the core is provided with a slot for insertion of a tool to
facilitate removal of the core from the base, and showing the core
in lock position.
DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to the drawings in greater detail:
The first embodiment of the present invention is a safety cap 1 and
container 2 for use with such cap 1 as shown in FIGS. 1-6 wherein
the container 2 has an opening 3 in its upper end and a neck
portion 4 in which the container opening 3 is formed. The neck 4 is
provided with an annular lip portion 5 extending radially
outwardly. The cap 1 is adapted for mounting on the neck 4 in a
manner closing the container opening 3 and is comprised of a
unitary deformable base 6 having a core receiving chamber 7 in its
upper end and a core 8 movable between a lock position (e.g. as
illustrated in FIG. 3) in the core receiving chamber 7 and an
unlock position (e.g. as illustrated in FIG. 4).
The unitary deformable base 6 is comprised of a lower skirt portion
9 and an upper wall portion 10. The lower skirt portion 9 of the
unitary deformable base 6 extends downwardly to form a downwardly
opening chamber 11 to receive the container neck 4. The upper wall
portion 10 extends upwardly to form the upwardly opening chamber
which is the core receiving chamber 7.
The lower skirt portion 9 is formed to substantially encircle the
container neck 4 and has a portion 14 adapted to engage the
container neck 4 to prevent removal of the base 6 from the
container neck 4 when the core 8 is in lock position in the core
receiving chamber 7. In the instant embodiment, where the container
2 has an outwardly projecting lip portion 5, the neck engaging
portion 14 of the base's lower skirt 9 is comprised of an inwardly
projecting rib 14 adapted to extend beneath the container's
aforesaid outwardly projecting lip portion 5. The upper wall
portion 10 of the base 6 has a surface region 13 adapted for manual
engagement, hereinafter referred to as the "finger engaging surface
13", located directly above the neck engaging portion 14 of the
lower skirt portion 9. The base 6 is deformable in a manner such
that when sufficient finger pressure is applied to the finger
engaging surface 13, the base 6 deforms to assume a release
configuration characterized by substantial inward deformation of
the upper wall portion 10 at the finger engaging surface 13 into
the center of the core receiving chamber 7, thereby causing the
neck engaging portion 14 of the skirt portion to be retracted away
from the center of the neck receiving chamber 11 and permitting the
base 6 to be disengaged from the container neck 4 and removed from
the container 2.
The base 6 has a central flexible transverse web portion 15
extending from its interior surface at the intersection of the
upper wall portion 10 and the lower skirt portion 9 to separate the
core receiving chamber 7 from the neck receiving chamber 11. The
core receiving chamber 7 is essentially cylindrical in form and the
core member 8 has an outer diameter generally corresponding to the
inner diameter of the core receiving chamber 7.
The core 8 is disposed in the core receiving chamber 7 and
rotatable relative to the base 6 between a locked position (see
FIG. 3) and an unlocked position (see FIG. 4). The core 8 has
opposed off-set portions 16 in its side surfaces.
When the core 8 is in lock position, the off-set portions 16 are
disposed generally 90.degree. away from the finger engaging
portions 13 so that finger pressure on the finger engaging surface
13 tending to deform the upper wall portion 10 toward the center of
the core receiving chamber 7 will not so deform base 6 due to
obstruction provided by the core 8.
When the core 8 has been rotated from the lock position into the
unlock position, the unlock position is characterized by alignment
of the off-set core portion 16 with the finger engaging surface 13
of the base 6. When the core 8 is in unlock position, finger
pressure applied to the finger engaging surface 13 of the base 6
deforms the base 6 inwardly at that point without interference or
obstruction of the core 8. Thus, when the core 8 is in unlock
position, the base 6 may be deformed to assume the aforesaid
release configuration (characterized by substantial inward
deformation of the upper closure member wall 10 at the finger
engaging surface 13 so that the base wall 10 deforms into the core
receiving chamber 7; and further characterized by the outward
deformation of the neck engaging portion 14 of the base skirt 9
away from the container neck 4 to permit disengagement of the base
6 from the container neck 4 and allow removal of the base 6
therefrom).
The base 6 is of unitary construction and may be constructed of a
variety of materials including polyethylene. The base 6 is
constructed so that the portions comprising the finger engaging
surface 13 and the neck engaging portion 14 are fairly rigid, and
perhaps more rigid than other portions of the base 6, so that when
pressure is exerted inwardly on the finger engaging surface 13 in
the aforesaid manner, the base 6 will deform at the sides and at
the web 15 before it deforms rather than at the finger engaging
surface 13.
The core 8 may be constructed of any suitable material including
polyethylene, however, it should have a relatively rigid
construction.
Proper deformation of the base 6 into the release configuration is
facilitated by providing a cut-away portion 17 to relieve the sides
of the lower skirt 9 during deformation as shown in FIG. 5.
The core 8 has a connector 18 extending from the center of the
core's lower surface and provided with an enlarged end portion 20.
The connector 18 extends through an aperture 19 formed in the base
web 15 and is anchored there by the enlarged connector end 20.
Referring now to the second embodiment of the present invention,
illustrated in FIGS. 7-9, there is shown a container 21 having a
neck portion 22 with the container opening 23 in the neck portion
22 and with lip portions 24 extending in an annular fashion
radially outwardly from the neck portion 22. The safety cap 25 is
adapted to fit securely upon the neck of the container 21 to close
the container opening 23. The safety cap 25 is comprised of a
unitary deformable base member 26 having a core receiving chamber
27 in its upper end and a core 28 received in the core receiving
chamber 27 and movable between a lock position and an unlock
position. The unitary deformable base 26 comprises a lower skirt
portion 29 and an upper wall portion 30. The lower skirt portion 29
encircles the neck 22 of the container 21 and forms a downwardly
opening neck receiving chamber 31. The base skirt 29 has neck
engaging portions 32 which are comprised of opposed inwardly
projecting rib portions 24 of the container neck 22. The upper wall
portion 30 of the base 26 opens upwardly and forms the core
receiving chamber 27. The upper wall portion 30 is provided with a
finger engaging surface 33 located directly above the neck engaging
portion 32 of the skirt 29. The base 26 is deformable to assume a
release configuration in response to finger pressure applied to the
finger engaging surface 33 where such pressure is sufficient to
deform the upper wall portion 30 so that the finger engaging
surface 33 moves substantially towards the center of the core
receiving chamber 27, thereby deforming the neck engaging portion
32 of the skirt 29 away from the center of the neck 22. When the
neck 22 is received in the neck receiving chamber 31, deformation
of the base 26 into the release configuration disengages the neck
engaging portion 32 from the container neck 22 and permits removal
of the base 26 therefrom.
The base 26 is further comprised of a central transverse web
portion 34 extending from its interior surface at the intersection
of the upper wall 30 and lower skirt portion 29 of the base 26 to
separate the core receiving chamber 27 from the neck receiving
chamber 31. The web 34 is provided with a central aperture 35 for
receiving the core connector 36.
The core 28 of the embodiment shown in FIGS. 7-9 has a generally
cylindrical body portion 37 with threaded sides 38 corresponding to
the inner side 39 of the base's upper side wall 30 which is also
threaded. The core 28 has cut-away grip portions 40 to permit
manual rotation of the core 28 within the core receiving chamber
27. When rotated, the core 28 moves screw-like between a lock
position (shown in FIG. 7) and an unlock position (shown in FIG. 8)
where the core 28 is withdrawn from the base 26. The core 28 is
further provided with an elongated connector 36 having an enlarged
anchor portion 41 on its opposed end. The core connector 36 is
received in the web's central aperture 35 and extends down into the
neck receiving chamber 31 beneath. The enlarged end portion 41
anchors the core 28 in the aperture 35 so that when the core 28 is
unscrewed from the core chamber 27, as shown in FIG. 8, the core 28
remains attached to the base 26. In addition, the enlarged end 41
of the core 28 fits tightly into the container opening 23 at a
reduced portion 42 of the container neck 22. While this added
sealing feature is optional, it causes the cap 25 to draw up tight
on the container neck 22, providing a positive seal which may be
desired for bottles intended to contain liquids and otherwise
provides a snug fit.
FIG. 10-12 are illustrative of a third embodiment of the present
invention wherein a safety cap 50, suited for use with a container
(not shown) similar to that previously illustrated and discussed,
is comprised of a unitary deformable base 51 having a core
receiving chamber 52 formed in its upper region and a core member
53 received therein and movable relative thereto between a locked
position and an unlocked position. The deformable base 51 is
comprised of a lower skirt portion 54 forming a chamber 55 to
receive a container neck and an upper wall portion 56 forming the
core receiving chamber 52. The deformable base 51 is further
comprised of a central transverse web portion 57 spanning the base
interior to generally separate the core receiving chamber 52 from
the neck receiving chamber 55. The lower skirt portion 54 is
adapted to encircle a container neck and has a neck engaging
portion 58 comprised of an inwardly projecting ribs 58 adapted to
extend beneath the container lip. The base's upper wall portion 56
has a finger engaging surface 59 located above the neck engaging
portion 58 of the skirt 54. The base 51 is deformable to assume a
release configuration in response to finger pressure applied to the
finger engaging surface 59 where the pressure is sufficient to
deform the upper wall portion 56 to move the finger engaging
surface 59 substantially inward toward the core receiving chamber
52 and to deform the neck engaging portion 58 of the skirt portion
54 away from the center of the neck receivin chamber 56 so that it
will disengage a container neck and permit its removal
therefrom.
The upper wall portions 56 of the base 51 are provided with two
opposed inwardly extending flanges 60 which extend only part of the
distance around the interior of the upper wall portion 56.
The core 53 is generally cylindrical and has cylindrical side walls
61 as shown in FIG. 12 with two opposed radially outwardly
extending flange portions 62 which extend about only a portion of
the core's side surface. When the core 53 is in lock position, the
core flanges 62 are located beneath the base flanges 60, so that
the core 53 may not be withdrawn from the core chamber 52 without
first rotating it to an intermediate position where the core
flanges 62 are no longer beneath the base's inwardly extending
flanges 60. The core 53 may be withdrawn from the core chamber 52
after having been rotated to such intermediate position. The core
53 is provided with an elongated core connector 63 extending from
its lower surface. The core connector 63 is received in an aperture
65 in the base's web 57 and has an enlarged end portion 64 to
anchor it there. Thus, when the core 53 is withdrawn from the core
chamber 52 (unlock position) as shown in FIG. 11, the core 53 is
retained from becoming entirely disengaged from the base 51.
When the core 53 is in lock position, as shown in FIG. 10, the
finger engaging surface 59 of the upper closure wall 56 may not be
deformed inwardly to any substantial degree and, consequently, the
neck engaging portion 58 of the skirt 54 disposed beneath the
finger engaging surface 59 may not be retracted away from the neck
receiving chamber 55 or away from the container neck and cannot
assume the release configuration necessary for removal of the cap
50 from its container.
FIGS. 13 and 14 are illustrative of a fourth embodiment of the
present invention wherein a safety cap 70, suited for use with a
container (not shown) similar to that previously illustrated and
discussed, is comprised of a unitary deformable base 71 having a
core receiving chamber 72 in its upper region and a core 73 movable
relative to said core receiving chamber 72 between a lock position
and an unlock position. The base 71 is comprised of an upper wall
portion 74 forming the core receiving chamber 72 and a lower skirt
portion 75 forming a container neck receiving chamber 76 and
adapted to encircle a container neck of the type described. The
base's skirt portion 75 has neck engaging portions 77 on opposed
sides and these comprise inwardly projecting ribs 77 adapted to
extend beneath the outwardly projecting lip portions of the
container neck to prevent removal of the base 71 therefrom. The
upper wall protion 74 has finger engaging portions 78 located
directly above the neck engaging portions 77 of the skirt 75. The
base 71 is deformable to assume a release configuration in response
to finger pressure applied to the finger engaging surface 78 to
deform the upper wall to move the finger engaging surface 78 and
thereby deform the neck engaging portions 77 of the skirt 75 to
retract the rib portions 77 from the container neck to permit
removal of the base 71 from the container. A central transverse web
portion 79 spans the interior of the base 71 and separates the core
receiving chamber 72 from the neck receiving chamber 76. The inner
surface of the base's upper wall 74 is provided with an annular
indentation 80 and the core 73 is provided with a corresponding
annular rib 81 on its side wall so that when the core 73 is
received in the core receiving chamber 72, the core rib 81 is
received in the indentation 80. The core 73 may thus be snap-fitted
in the lock position. Suitable grip indentations 82 may be provided
in the upper surface of the core so that the core may be removed by
hand or, for example, as shown in FIG. 14, by using an instrument
or lever-like object 83.
FIGS. 15 and 16 are illustrative of a fifth embodiment of the
present invention wherein a safety cap 90, suited for use with a
container (not shown) similar to that previously illustrated and
discussed, is comprised of a unitary deformable base 91 having a
core receiving chamber 92 in its upper region and a core 93 movable
relative to said core receiving chamber 92 between a lock position
and an unlock position. The base 91 is comprised of an upper wall
portion 94 forming the core receiving chamber 92 and a lower skirt
portion 59 forming a container neck receiving chamber 96 adapted to
enclose the container neck. The base skirt portion 95 has neck
engaging portions 97 on opposed sides and these comprise inwardly
projecting ribs 97 adapted to extend beneath the outwardly
projecting lip portions of the container neck. The upper wall
portion 94 has finger engaging portions 98 located directly above
the neck engaging portions 97 of the skirt 95. The base 91 is
deformable to assume a release configuration in response to finger
pressure applied to the finger engaging portion 98. A central web
portion 99 spans the interior of the base 91 and separates the core
receiving chamber 92 from the neck receiving chamber 96. An annular
rim 100 projects a short distance inwardly from the upper edge of
the upper wall portion 94. This rim 100 serves to hold the core 93
in the core receiving chamber 92, yet permits core rotation. The
core 93 itself is generally disc-like with opposed off-set portions
101 in its side surfaces and the side surfaces are angled slightly
inwardly so that the core is slightly wider at the top than at the
bottom to facilitate insertion of the core 93 in the core chamber
92 during assembly.
FIG. 17 through 20 inclusive are illustrative of a sixth embodiment
of the present invention comprising a safety closure consisting of
a one-piece safety cap 110 and container 111. The container 111 is
provided with a radial recession 112 on its inner surface at the
container mouth. The main elements of the one-piece cap are a base
113, a core 114 and a flexible tab 115 connecting one side of the
core 114 to one side of the base 113.
The base 113 has a downwardly opening annular shaped first chamber
116 to enclose the container mouth, and an upwardly opening second
chamber 117 having a lower generally cylindrical portion 118
locating in the center of the annular first chamber 116 and an
enlarged upper portion 119. The first and second chambers 116 and
117 are separated by a transverse web portion 120 integrally formed
in said base 113. The transverse web 120 extends inwardly from the
center of the generally cylindrical side wall 121 of the base 113
which consists of an upper wall portion 122 defining the vertical
sides of the upwardly opening second chamber 117 and a lower skirt
portion 123 defining the vertical sides of the downwardly opening
first chamber 116. The transverse web 120 has a radial-horizontal
portion 124 joining the sides of the base 113, a vertical portion
125 extending downwardly from the radially inner end of the
radial-horizontal portion 124, and a disc-like central portion 126
extending from and joining the lower ends of the vertical web
portion 125.
The radially outer surface of the vertical portion 125 of the web
120 has a pair of radially outwardly projecting portions 127, the
uppermost of which locates in the radial recession 112 inside the
container mouth.
When the core 114 is inserted in the upwardly opening second base
chamber 117, the radial projections 127 on the base 113 prevent
removal of the cap 110 from the container 111.
When the core 114 is removed from the second base chamber 117, the
base 113 may be deformed by radially inwardly directed pressure
applied to the outer surface of the upper wall portion 122 of the
base 113 above the container 111. When deformed in this manner, the
base 113 assumes its release configuration characterized in that
the radial base projections 127 are retracted inwardly out of the
radial container recessions 112, whereupon the base 113 may be
removed from the container 111.
The core 114 is designed to be removably pop-fitted in the second
chamber 117. When so fitted the core 114 obstructs radially inward
deformation of the base 113 so that it is prevented from assuming
the release configuration. The core 114 has a generally cylindrical
lower portion 128 which removably locates in the generally
cylindrical lower portion of the second base chamber 117, and a
generally disc-like upper portion 129 which locates in the enlarged
upper portion of the second base chamber 117.
The disc-like upper core portion 129 has relatively narrow vertical
side walls 130 adjacent the tab 115 and extending roughly
120.degree. past the tab 115 on either side whereupon the side
walls of the disc portion begin to slant inwardly forming a
downwardly facing inclined surface 131 for about 120.degree. about
the side of the core disc portion 129 opposite the flexible tab
115. In addition, a narrow offset ledge of seat 132 is formed in
the core disc portion above the aforesaid inclined side surface
131. The enlarged upper portion 119 of the base's core receiving
chamber 117 is correspondingly formed to closely fit the core disc
portion 129, such upper chamber portion 119 having vertical side
edges 133 for roughly 120.degree. on either side of the flexible
tab 115 and then an upwardly facing inclined surface 134 for about
120.degree. about the chamber wall portion opposite the tab 115. In
addition, a narrow radially projecting lip portion 135 extends
inwardly above such inclined chamber surface 134. When the core 114
is in place in the upper base chamber 119, the inclined core
surface 131 rests against and in generally parallel relation to the
inclined chamber wall surface 134 and the narrow base lip 135 seats
in the offset core seat 132. The lip 135 primarily serves two
functions, the first being that it provides a pop-fit tending to
hold the core 114 in the chamber 117, and the second being to
overlay the undercut core edge surface 131 so that the core 114
cannot be pried out.
In the operation of the safety closure, the cap 110 is removed in
two steps. In the first step, finger pressure is is applied
radially inwardly at the side of the base 113 above the container
111 on the outer surface of the upper side wall portion 122
adjacent the inclined surface 134 (opposite the flexible tab 115).
Inward pressure at that point, transmitted to the core at the
inclined core and base surfaces 131 and 134, causes a resultant
upward force component tending to force the core 114 upwardly out
of the core chamber 117.
Once the core 114 is removed, the second step in removing the cap
110 consists of applying finger pressure radially inwardly at one
or more sides of the base 113 above the container 111 on the upper
side wall portion 122. Such pressure deforms the cap 110 (to assume
release configuration) and retracts at least a portion of the
radial core projection 127 out of the radial container recession
112 thereby permitting the cap 110 to be pulled off the container
111. This may not be done while the core 114 is in the core chamber
117 since the core 114 obstructs inward deformation of the base
113.
It will be appreciated that the safety cap 110 shown in FIG. 17-20
is constructed in one piece which facilitates production and
assembly, tending to lower production costs, and also prevents loss
of the core.
A seventh embodiment of the present invention is illustrated in
FIG. 21 which is a safety closure consisting of a container 140 and
safety cap 141 essentially identical to the closure illustrated and
described with regard to FIGS. 17-21, except that the lower
cylindrical portion of the core 142 is provided with a radially
outward projection 143 about its circumference, and the vertical
side walls 144 of the lower generally cylindrical portion of the
base's core chamber 147 are provided with a corresponding radial
recession 145. When assembled, the aforesaid radial projection 143
locates in the radial recession 145 in pop-fitted relation tending
to prevent removal of the core 146. The primary function of this
added feature is to make removal of the core 146 more difficult so
that greater finger pressure must be applied at the side in order
to pop the core 146 out of the base core chamber 147. In all other
aspects, the construction and operation of this embodiment and that
shown in FIGS. 17 to 20 are essentially the same.
An eighth embodiment of the present invention, shown in FIG. 22, is
a safety closure essentially identical in form and operation to the
closure illustrated in FIG. 21, except that the inclined surfaces
of the core and base, the offset core seat and the inwardly
projecting base lip are eliminated so that the side 150 of the
upper-disc like portion 151 of the core 152 is generally vertical
about its entirety (except at the flexible tab 153), are as is the
corresponding inner side wall 154 of the upper enlarged portion of
the core chamber. A narrow upwardly opening aperture 155 is
provided in the upper surface of the core so that a prying tool may
be employed to withdraw the core from the core chamber (rather than
the finger pressure technique described in connection with the two
previous embodiments).
Each of the sixth, seventh and eighth embodiments shown are
constructed of a suitable flexible plastic material, such as
polyethylene.
The foregoing is considered as illustrative only of the principles
of the present invention, and since numerous modifications and
changes will readily occur to those skilled in the art, the
invention is not limited to the exact construction and operation
shown and described, and accordingly all suitable modifications and
equivalents may be resorted to, falling within the scope of the
appended claims.
* * * * *