U.S. patent number 3,722,727 [Application Number 05/157,850] was granted by the patent office on 1973-03-27 for safety closure for a medicine bottle.
This patent grant is currently assigned to Sunbeam Plastics Corporation. Invention is credited to Peter P. Gach.
United States Patent |
3,722,727 |
Gach |
March 27, 1973 |
SAFETY CLOSURE FOR A MEDICINE BOTTLE
Abstract
A child-proof closure for a medicine bottle or the like. The
closure consists of a threaded cap and relatively flexible over-cap
or driver. The cap and driver have cooperating ratchet drive means
for screwing the cap onto the bottle by rotating the driver. The
driver normally is rotatable in the opposite direction relative to
the cap. The cap has a recess in its outer wall and a portion of
the wall of the driver is radially inwardly displaceable for
engagement in the recess for delivering unscrewing torque from the
driver to the cap.
Inventors: |
Gach; Peter P. (Evansville,
IN) |
Assignee: |
Sunbeam Plastics Corporation
(Evansville, IN)
|
Family
ID: |
26832594 |
Appl.
No.: |
05/157,850 |
Filed: |
June 29, 1971 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
|
134702 |
Apr 16, 1971 |
3679085 |
Jul 25, 1972 |
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Current U.S.
Class: |
215/220 |
Current CPC
Class: |
B65D
50/041 (20130101) |
Current International
Class: |
B65D
50/00 (20060101); B65D 50/04 (20060101); B65d
055/02 () |
Field of
Search: |
;215/9,43A |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Hall; George T.
Parent Case Text
This application is a continuation-in-part of my application, Ser.
No. 134,702 filed Apr. 16, 1971, now U.S. Pat. No. 3,679,085 of
July 25, 1972.
Claims
What I claim is:
1. A substantially child-proof closure for a medicine bottle or the
like having a threaded neck, said closure consisting of:
1. an inner cup-shaped cap having
a. an annular skirt and
b. a closed top,
c. the inner surface of said skirt being threaded to mate with the
threaded neck of the bottle, and
2. an outer cup-shaped driver having
a. an annular skirt and
b. a closed top at least generally complementary to the closed top
of said cap,
c. the length and interior diameter of the skirt of said driver
being greater than the length and exterior diameter of the skirt of
said cap,
3. co-operating one-way drive means on adjacent parts of said cap
and said driver, said drive means being operable for screwing said
cap onto said bottle neck by rotating said driver
4. and co-operating engageable drive means for unscrewing said cap
by rotating said driver, said engageable drive means comprising
a. at least one axially extending abutment on the outer surface of
the skirt of said cap and
b. at least one radially inwardly displaceable portion in the skirt
of said driver which is adapted to engage said abutment when
squeezed radially inwardly for transferring unscrewing torque from
said driver to said cap for removing the same.
2. A child-proof cap for medicine bottles and the like, having
threaded necks, said cap consisting of
a. an inner, inverted, cup-shaped closure having,
1. a tubular side wall,
2. a disc-shaped top,
the interior of said side wall having threads adapted to be screwed
on to and off of such bottle neck,
b. an outer, inverted driver having,
1. a tubular side wall of axial length greater than the side wall
of said closure,
2. an inwardly directed lip at the lower end of said side wall
adapted to snap beneath the lower edge of the side wall of said
closure for retaining said driver on said closure,
c. first co-operating one-way driving means on said closure and
said driver,
1. said first driving means being engaged by moving said driver
downwardly onto said closure and effective for rotating said
closure onto the bottle, and
d. second, co-operating driving means,
1. a first element thereof comprising an axially extending abutment
on the exterior of the side wall of said closure near the top
thereof, and
2. a second element thereof being a radially inwardly displaceable
segment at the top of the side wall of said driver.
3. A closure according to claim 2 and an inwardly directed lip on
the lower margin of the skirt of said driver for retaining said cap
and said driver in telescoped relationship, said lip being axially
spaced from the top of said driver a distance greater than the
axial length of said cap whereby said cap and driver are movable
axially relative to each other as required during reverse relative
rotation of the parts of the one-way drive means.
4. A closure according to claim 2 in which the recess in the skirt
of the cap extends axially thereof and is defined by substantially
parallel side walls lying in radial planes and the displaceable
portion in the skirt of said driver is a hingedly movable segment
of said skirt.
5. A closure for the threaded neck of a bottle, said closure
comprising an internally threaded cap, an overcap adapted to fit
over said cap and normally freely rotatable relative to said cap in
cap unscrewing direction and torque transfer means comprising a
recess in the outer wall of said cap and a radially inwardly
displaceable portion in the wall of said overcap engageable in said
recess for delivering torque from said overcap to said cap for
unscrewing said cap off of said bottle.
Description
BACKGROUND OF THE INVENTION
Many so-called child-proof bottle caps have been suggested in the
past the purpose of which is to make it difficult for a small
child, say less than 6 years old, to open the bottle and thus
obtain access to medicine, poisons, or other dangerous or harmful
substances.
Many of these prior art closures are extremely complicated
comprising combination locks, requiring multiple operations to put
the caps on the bottles as well as to remove them from the bottles,
or involving expensive shapes, and thus most of them have not been
successful in the market place.
Many other so-called child-proof bottlecaps have been designed
which were effective to contain tablets or pills in the bottle but
which did not make a tight enough seal with the neck of the bottle
in order to package liquid materials.
In some prior art safety closures the above objectives have been
achieved but the closures are not adapted to be put on the bottles
by conventional automatic bottling machinery which usually has a
collect-type chuck or a series thereof, each chuck picking up one
of the caps, coming down and spinning it on to the bottle neck. If
a particular manipulation or series of manipulations is required to
put the bottle cap onto the neck, a conventional capping machine
cannot be used.
It is therefore the principal object of the instant invention to
provide a simple closure for a bottle having a threaded neck which
is significantly difficult of removal by a small child but which
can readily be put onto the bottle neck both by automatic machinery
and by a person desiring to close the bottle and can rather readily
be removed from the bottle by an older child or an adult.
It is yet another object of the instant invention to provide a
closure for a medicine bottle or the like which has only two
pieces, one being the actual cap for the bottle and the second
being an over-cap or a driver which covers the inner cap and which
is rotatable relative to the cap when the driver is turned in the
direction which would normally be expected to unscrew the cap from
the bottle, unless certain manipulations are performed to engage
the driver with the cap.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a bottom view in perspective with parts broken away of an
overcap or driver designed according to a first embodiment of the
instant invention;
FIG. 2 is a top view in perspective of an inner cap designed to
cooperate with the overcap shown in FIG. 1 to constitute a closure
embodying the invention;
FIG. 3 is a vertical, sectional view, with a bottle shown
fragmentarily, of the driver and cap of the instant embodiment of
the invention in "closed" position;
FIG. 4 is a fragmentary view similar to FIG. 3 but illustrating the
driver and cap of this embodiment of the invention in their
position for unscrewing the bottle cap;
FIG. 4 is a fragmentary, horizontal sectional view taken along the
line 5--5 of FIG. 4;
FIG. 6 is a top plan view of a closure embodying a second
modification of the instant invention;
FIG. 7 is a side view in elevation, with parts broken away and
parts shown in phantom, of the closure illustrated in FIG. 6;
FIG. 8 is a fragmentary, vertical sectional view taken along the
line 8--8 of FIG. 7 and shown on an enlarged scale;
FIG. 9 is a top plan view of the inner bottle cap of this
embodiment of the invention;
FIG. 10 is a bottom plan view of the overcap or driver of this
embodiment of the invention; and
FIG. 11 is a fragmentary, horizontal sectional view taken
substantially along the line 11--11 of FIG. 8 but illustrating the
cooperating parts of the closure by which torque applied to the
overcap or driver is delivered to the inner bottle cap in order to
remove the closure from the bottle.
DESCRIPTION OF PREFERRED EMBODIMENTS
The embodiment of the invention illustrated in FIGS. 1-5 consists
of an overcap or driver 20 and an inner or bottle cap 21. The
driver 20 has a generally annular skirt 22 and a closed top 23. The
inner cap 21 has an annular skirt 24 and a closed top 25.
The outside diameter of the inner cap 21 and the axial length of
its skirt 24 are less than the inside diameter and axial length of
the skirt 22 of the driver 20. The two elements, viz the driver 20
and the cap 21 are thus designed and adapted to be telescoped and a
lip 26 at the lower margin of the driver skirt 22 has an inside
diameter which is less than the outside diameter of an outwardly
directed rim 27 at the lower margin of the cap skirt 24. Engagement
of the rim 27 with the lip 26 retains the driver 20 and cap 21 in
telescoped position as shown in FIGS. 3 and 4.
A closure according to this embodiment of the invention has
cooperating one-way drive means consisting of ratchet dogs 28
formed on the cap 21 and cooperating, oppositely directed ratchet
dogs 29 formed on the driver 20. While the dogs 28 and 29 are
illustrated in this embodiment of the invention as being located on
the top of the cap 21 and the underside of the top of the driver
20, it will be appreciated that they may also be located at the
shoulders of the cap and driver 20 and 21 or even on their
peripheral surfaces. The only requirement is that the dogs or teeth
28 and 29 shall be engageable for transmitting torque only when the
driver 20 is rotated in a direction to screw the cap 21 onto the
threaded neck of a bottle 30, fragmentarily illustrated in FIGS. 3
and 4.
In this embodiment of the invention, as can best be seen by
comparing FIGS. 3 and 4, the underside of the top 23 of the driver
20 has a central fulcrum 31 which is aligned with and engages a
central pad 32 erected at the center of the top 25 of the cap
21.
The cap 21 is fabricated by molding, for example, from a relatively
stiff resinous material such as medium impact polystyrene and the
overcap or driver 20 is fabricated as by molding from a
comparatively resilient material such as polypropylene. The
relative stiffness of the screw cap 21 is necessary in order that
it may be threaded down onto the neck of the bottle 30 sufficiently
tightly to compress the marginal edges of a disc-like liner 33 in
order to seal the bottle against leakage, particularly when the
contained material is liquid or is harmed by exposure to
atmosphere.
When it is desired to close the bottle, either during the filling
process or after it has been opened to dispense a part of the
contents thereof, the rim of the top 23 of the driver 20 is pushed
downwardly, for example by the fingers of a person or by the
capping chuck, flexing the top 23 (see FIG. 4) around the fulcrum
31 to engage the one-way drive dogs 28 and 29. Torque can then be
directly delivered from the driver 20 to the cap 21 by the
engagement of the two sets of dogs 28 and 29.
If a person endeavors to open the bottle either by merely rotating
the driver 20 in a counterclockwise direction (conventional
threading) or even by depressing the rim of its top 23 as
illustrated in FIG. 4, the overcap 20 will either freely rotate
relative to the cap 21 or it will ratchet backwardly and no driving
torque can successfully be transferred to the threaded cap 21.
A closure embodying this modification of the invention also
comprises an engageable drive means so designed as to enable the
transfer of torque from the driver 20 to the threaded cap 21. This
engageable drive means comprises cooperating elements illustrated
as recesses 34 molded in the outer surface of the cap skirt 24 and
at least one radially displaceable segment 35 formed in the skirt
22 of the driver 20. In this embodiment of the invention there are
shown four recesses in the cap 21 and four segments 35 in the skirt
22. The segments 35 are illustrated as being defined by inverted
horseshoe-shaped slots 36 enabling the segments 35 to be flexed
inwardly at their upper edges in order to engage them in the
recesses 34 when the driver 20 and cap 21 are angularly
aligned.
It will also be observed by comparing FIGS. 3 and 4 that during the
"normal" positions of the driver 20 and the cap 21, the upper ends
of the segments 35 are held at a level above the upper ends of the
recesses 34 by the engagement of the fulcrum 31 with the pad 32. It
is thus necessary to depress the shoulders of the driver 20 not
only to turn the cap 21 on to the bottle 30 but also to permit the
segments 35 to be squeezed radially inwardly into the recesses 34
in order to transfer torque from the driver 20 to the cap 21 so
that the cap 21 can be unscrewed from the bottle 30. By requiring
both that the top 23 be flexed as shown in FIG. 4 and that the
segments 35 be flexed radially inwardly in order to deliver torque
to the cap 21, the necessary actions are well beyond the
capabilities of small children in the age bracket of say, three to
six, or, possibly, even slightly older.
FIGS. 6-11
A second embodiment of a closure according to the invention is
illustrated in FIGS. 6-11. As in the first embodiment of FIGS. 1-5
inclusive, this second embodiment consists of a driver or overcap
40 and a threaded inner cap 41. The driver 40 has an annular skirt
42 and a flat top 43. The cap 41 has an annular skirt 44 and a
generally flat top 45. The inside diameter and the axial length of
the driver skirt 42 are both greater than the outside diameter and
axial length of the cap skirt 44. An inwardly directed lip 46 on
the driver skirt 42 has a slightly smaller diameter than an
outwardly directed rim 47 on the cap skirt 44 to retain the driver
40 and cap 41 in telescoping position after they have been
initially assembled.
This second embodiment of a closure according to the invention also
has a one-way ratchet drive means consisting, in this instance, of
notches 48 formed at the top of the cap 41 and drive dogs 49 formed
on the bottom surface of the driver top 43.
In contrast, however, to the first embodiment of the invention
illustrated in FIGS. 1-5, inclusive, it is not necessary to flex
the driver top 43 in order to engage the drive dogs 49 in the
notches 48. Gravity pulls the driver 40 downwardly so that these
elements engage immediately as soon as torque is applied to the
driver 40. Thus, immediately upon insertion of the threaded neck of
a bottle 50 into the open bottom ends of the cap 41 and driver 40,
the driver 40 can be rotated by either a capping chuck or by the
fingers of a person seeking to re-close the bottle.
The notches 48 are cut or molded into an annular upstanding rim 51
at the margin of the cap top 45 and the dogs 49 are located
radially at the same distance from the axis of the driver 40 and
the cap 41. A downwardly extending ring 51 of a diameter less than
the inside diameter of the rim 50 is formed on the under surface of
the driver top 43 to mate with the larger rim 50 in order to
maintain the driver 40 and the cap 41 in co-axial relationship
relative to each other when the two are telescoped together.
It will also be observed, particularly in FIG. 8, that the axial
depth of the notches 48 is greater than the axial depth of the dogs
49. The previously mentioned difference in length of the driver
skirt 42 and the cap skirt 44 is enough so that when the driver 40
is rotated in a counterclockwise direction relative to the cap 41,
and the ratchet action of the dogs 49 and notches 48 causes the
driver 40 to be lifted, the difference in length of their
respective skirts provides for this lifting, ratcheting action.
As in the embodiment illustrated in FIGS. 1-5, inclusive, however,
torque applied to the driver 40 by either the capping chuck or the
fingers of the user is transferred directly to the inner cap 41 by
the engagement of the one-way ratchet means 48-49 so that the inner
cap 41 can be tightly threaded downwardly onto the neck of the
bottle 50 to compress a disc-like liner 53 in order to seal the
bottle 50.
Also in common with the embodiment of the invention illustrated in
FIGS. 1-5, inclusive, this second embodiment of the invention as
illustrated in FIGS. 6-11, includes an engageable drive means which
must be specially actuated in order to deliver torque from the
driver 40 to the cap 41 in order to screw the cap 41 off of the
bottle 50. This engageable drive means is illustrated as consisting
of an axially extending recess 54 molded in the outer side of the
cap skirt 44 and a segment 55 formed in the driver skirt 42. In
this embodiment, however, the segment 55 is defined by a short
arcuate slot 56 in the driver top 43 which provides space inwardly
of the segment 55 so that the segment 55 may be flexed radially
inwardly to engage it in the recess 54. Although only one recess 54
and one segment 55 are shown in FIGS. 6-11, inclusive, if found
desirable, additional cooperating engageable drive means of the
same nature may also be provided at the side of the driver 40 and
the cap 41 opposite to that at which the illustrated recess 54 and
segment 55 are shown.
In addition, and as illustrated in FIGS. 7 and 8, the outer side of
the driver skirt 42 may be provided with ribs 57 in order to
facilitate grasping the driver 40 in the fingers of a person
desiring to rotate the driver 40 either for sealing the bottle 50
tightly or for delivering torque to the cap 41 in order to open the
bottle 50.
* * * * *