A security stopper or other closure for a bottle comprises a valve which rests upon its seat except when the contents of a bottle are to be poured out through the stopper which thereby serves as a dispenser. The valve and seat arrangement is located at the lower portion of the plug-like body, the upper portion of which is provided from top to bottom with an upper baffle, an intermediate grill and a lower baffle to prevent access to the valve by a tool inserted through the pouring spout of the dispenser and thereby precluding refilling by dislocation of the valve.

FIELD OF THE INVENTION 
The present invention relates to a security dispenser and, more 
particularly, to a plug or stopper-like dispenser for a bottle or other 
container which permits pouring of the contents but prevents refilling of 
the bottle. 
BACKGROUND OF THE INVENTION 
The large number of cases in which bottles and other containers are 
fraudulently refilled with liquids other than their original contents has 
led to an interest in a dispensing-type closure for such containers which 
will permit the original liquid to be dispensed by tilting the bottle, 
i.e. turning the mouth and the dispenser plug downwardly, while precluding 
refilling of the bottle when the latter is in an upright position. To this 
end, the dispenser closure or plug which can be sealed in the mouth of the 
bottle, can be provided with a valve member which, in the upright position 
of the bottle, rests upon a seat but, when the bottle is tilted 
sufficiently, will be removed from the seat to permit dispensing of the 
liquid. 
When the valve is in its closed state, a liquid poured into the closure 
cannot penetrate beyond the valve member and thus refilling of the bottle 
is precluded. 
To avoid dislocation of the valve member, e.g. by a tool inserted into the 
plug or closure through the pouring spout or opening, it has been proposed 
to provide such dispensing closures with a baffle arrangement in the upper 
portion of the plug. The baffle arrangement is designed to bar penetration 
of a valve-lifting tool into the lower portion of the device and thus 
secure the latter against movement of the valve member when the bottle is 
in an upright position. 
Prior art baffle arrangements are either so efficient in barring insertion 
of the tool that they interfere with proper flow of liquid past the baffle 
and thus from the dispenser. Where proper flow is assured in these earlier 
cases, the baffle is insufficiently effective against penetration by a 
tool. 
OBJECTS OF THE INVENTION 
It is the principal object of the present invention to provide an 
antirefilling dispensing closure for a liquid container whereby the 
disadvantages of the prior art systems are avoided. 
Another object of this invention is to provide an antirefilling plug or 
stopper which effectively blocks refilling and yet permits smooth flow of 
the liquid from the bottle. 
SUMMARY OF THE INVENTION 
These objects and others which will become apparent hereinafter are 
attained, in accordance with the present invention, with a safety plug or 
antirefilling closure for the purposes described which is formed with a 
lower chamber having a valve permitting flow of liquid through the 
dispenser when the bottle is tilted into a pouring position but barring 
the inflow of liquid in all other positions, and an upper chamber 
communicating with the lower chamber and formed from top to bottom with a 
disk-shaped baffle, a convex grill and an offset-passage baffle, the three 
being disposed one below the next in the second chamber. 
According to a feature of the invention, the upper or disk baffle is 
provided with a disk-shaped imperforate cylindrical portion spaced from 
but juxtaposed with a cylindrical pouring spout of the plug and is further 
provided with a plurality of rigid flaps or fins alternately turned 
upwardly and downwardly along the periphery of the imperforate central 
portion. These oppositely turned flaps permit flow of the liquid around 
the disk-shaped central plate. 
According to another feature of the invention, the intermediate member is a 
grill which is upwardly convex and is lodged in a step of a tubular sleeve 
forming the upper chamber of the plug. 
The lower baffle is constituted by two disks injection molded from 
synthetic resin material and formed each on one side with three small 
tubes forming passages traversing the disk and disposed in angularly 
equispaced relationship about the axis of the plug and of the disks, the 
disks being dimensioned so that the tube of one disk can be received 
between two tubes of the other disk with all of the tubes being disposed 
in contiguous relationship about this axis and having their centers lying 
along a circle centered on the axis. The disks are dimensioned so that 
each of the tubes forms a shoulder against which the shoulder of the tubes 
of the other disk can lie, thereby permitting a meandering path for the 
liquid to be formed. 
Advantageously, the upper disk also is provided with a central tube whose 
function is to improve the uniformity of flow of the liquid through the 
device. 
All of the elements of the device, except the upper baffle and grill, may 
be composed of synthetic resin material.

SPECIFIC DESCRIPTION 
The plug shown in FIG. 1 comprises two bodies 1 and 2, respectively 
constituting the lower or plug portion and an upper dispenser portion of 
the device. 
The lower portion 1 has a generally cylindrical configuration and a 
frustoconically convergent tip 1a enabling the device to be tightly 
inserted into the mouth and neck of a bottle B containing a liquid to be 
dispensed and enabling the device to be sealed therein. 
This lower portion 1 can contain any suitable valve which permits 
dispensing of the liquid when the body is turned to tilt its neck 
downwardly, but otherwise barring the inflow of a counterfeit liquid into 
the bottle. For example, as shown in FIG. 1A, the bottom portion 1 can be 
provided with a seat 1b surrounding passage 1c communicating with the 
interior of the bottle and overlain by a valve flap 1d which is hinged at 
1e to the lower portion 1. 
This mechanism thus permits the flap 1d to move away from the seat when the 
liquid is poured and thus represents a two-way valve permitting emptying 
of the bottle but precluding refilling thereof. 
The upper portion 2 of the dispenser, which comprises a stepped cylindrical 
sleeve bonded to the lower portion 1, is formed with a cylindrical pouring 
spout 3 and contains a structure preventing insertion of a tool through 
the spout 3 to dislodge the valve member 1d. 
As described above, the invention represents an improvement in the 
structure within the upper portion of the device. 
The upper sleeve 2 forms a chamber receiving three individual elements, 
namely, an upper baffle 4, an intermediate grill 5 and a lower baffle 6. 
The upper baffle 4 is constituted by a metal disk having a circular 
imperforate central portion 7a formed along its periphery with radial 
wings or fins 7 offset alternately upwardly and downwardly and dimensioned 
to lock the upper baffle 4 within the cylindrical upper part 2a of the 
sleeve 2. 
The metallic grill 5 is upwardly convex and is resiliently seated, along 
its periphery, against a shoulder 8 formed between the upper cylindrical 
portion 2a and the lower cylindrical portion 2b of the sleeve 2. 
The lower baffle 6 which likewise is seated against the shoulder 8, e.g. 
the periphery of the upwardly convex grill 5, is constituted by two 
synthetic resin disks 9a and 9b. 
Each of these disks is formed with three small tubes or chimneys 10 
angularly offset from one another at 120.degree. about the axis of the 
disk and thus having centers lying along an imaginary circle centered on 
the disk. 
Each of the tubes 10 is formed at its free end with a shoulder 11 and the 
diameters of the tubular bosses 11a surrounded by the shoulders are such 
that the two disks can be nested as shown in FIG. 1 with their tubes 
angularly offset by 60.degree. from one another. The bosses of one disk 
are received between the bosses of the other disk so that the tubes of the 
two disks are disaligned from one another. 
The two disks 9a and 9b axially delimit a chamber 12 which communicates 
with the passage 1f of the lower part of the plug by the tubes 10 of disk 
9a. The chamber 12 thus serves to permit liquid communication between the 
upper and lower parts of the plug but because of the disalignment of the 
tubes of one disk from the tubes of the other, it is impossible to 
introduce any object through the plug to operate upon the flap 1d. 
To ensure uniformity of flow of the liquid from the dispenser, the upper 
disk 9a of the baffle 6 is provided with a central tube 13 extending 
upwardly (FIG. 1) and practically abutting the center of the upwardly 
convex grill 5. 
Experience has shown that the combination of the upper baffle 4, the 
intermediate grill 5 and the lower baffle 6 makes it impossible to insert 
any device capable of lifting the valve member 1d and thus umblocking the 
mechanism contained in the lower part of the plug. 
Surprisingly, the flow of liquid when the bottle is tilted is uniform and 
smooth, presumably because of the many passages in the two baffles and in 
the grill so that air can pass into the bottle as the liquid flows.