Abstract:
A liquid dispensing container including a reservoir chamber and a measuring chamber separated therefrom but in liquid communication therewith. A liquid transfer tube interconnects the reservoir chamber and the measuring chamber and, in a preferred embodiment is partly incorporated in wall structure separating the two chambers. A closable opening leads directly into the reservoir for filing the reservoir and a further closable opening leads from the measuring chamber for dispensing a measured volume of liquid. The walls of the reservoir chamber are flexible and may be pressed to force liquid from the reservoir through the tube and into the measuring chamber.

Description:
BACKGROUND OF THE INVENTION 
     The invention relates to containers for storing and dispensing measured volumes of liquid. 
     U.S. Pat. Nos. 4,646,948 and 4,893,732 disclose containers having at least two chambers or compartments. One chamber acts as a reservoir for storing liquid and the other chamber is a measuring and dispensing chamber arranged to receive a predetermined volume of liquid from the reservoir chamber and then dispense or discharge that measured volume. 
     In both these prior patents liquid is transferred from the reservoir chamber to the measuring chamber by tilting the container from an upright position to pour liquid from the reservoir through a channel or over a ledge into the measuring and dispensing chamber. When the container is then returned to its original upright position, the predetermined volume of measured liquid remains in the measuring or dispensing chamber and can subsequently be dispensed therefrom. In the case of U.S. Pat. No. 4,464,948 a graduated scale is provided on a wall portion of the measuring chamber and, with said wall portion being transparent or translucent, the amount of liquid poured into the measuring chamber can be controlled by visually monitoring the poured volume on the graduated scale which requires delicate control of the manual tilting of the container. In the case of U.S. Pat. No. 4,464,948 the container can be tilted to overfill the measuring and dispensing chamber whereupon the container is returned to its initial upright position and excess liquid is returned through a small bore or bleed hole provided in the web or wall portion separating the measuring and dispensing chambers to provide an exact dosage of liquid in the measuring chamber for subsequent dispensing. 
     U.S. Pat. Nos. 2,599,446, 2,743,849, 3,141,574 and 3,347,420 are all concerned with containers for measuring discrete quantities of a liquid by transferring liquid from a storage chamber to a separate chamber by squeezing the storage chamber to force liquid through a transfer conduit to the separate chamber. However, in all embodiments disclosed in these four patents it is necessary to disassemble the container in order to fill the storage chamber. Disassembly is effected either by separating the chambers or by removing the transfer conduit. 
     SUMMARY OF THE INVENTION 
     The container of the present invention has the advantage of facilitating accurate measurement of a predetermined volume of liquid without such liquid being exposed to ambient air. Moreover, the container is susceptible to refilling of the reservoir without the inconvenience of having to dismantle or rearrange components of the container. 
     According to the present invention there is provided a liquid dispensing container including a flexible walled reservoir chamber, a measuring chamber, a first pour spout opening into said reservoir chamber and a second pour spout leading from said measuring chamber, first and second sealing means respectively operatively associated with said first and second pour spouts, a partition isolating said measuring chamber from said reservoir chamber and an elongated conduit leading from said reservoir chamber and passing through said partition to provide access to said measuring chamber. 
     The liquid dispensing container includes a reservoir chamber, a measuring chamber in liquid communication with said reservoir chamber, means for transferring a measured amount of liquid from said reservoir chamber to said measuring chamber and a closable outlet for discharging said measured amount from said measuring chamber, wherein the container has resilient walls, wherein a closable inlet opens into said reservoir chamber for filling said reservoir chamber with liquid to be dispensed and a closable outlet leads from said measuring chamber for dispensing said measured amount therefrom and wherein the means for transferring the measured amount of liquid from the reservoir chamber to the measuring chamber includes a tube having one end located in the reservoir chamber to lie within liquid contained therein and an opposite end exiting into the measuring chamber whereby, with the measuring chamber vented, pressure applied to the resilient walls of the container will cause liquid to flow from the reservoir chamber through the tube and into the measuring chamber to accumulate a measured amount therein. 
     In order that the present invention may be more clearly understood and readily carried into effect, various embodiments of the invention will now be described with reference to the accompanying drawings, in which 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view of one embodiment of a measuring and dispensing container according to the invention, 
     FIG. 2 is a side elevation of the embodiment shown in FIG. 1 with one of the sealing caps removed, 
     FIG. 3 is a sectioned elevation through the embodiment of FIG. 1 with liquid contained in the reservoir chamber, 
     FIG. 4 is view similar to FIG. 3 but shows liquid passing from the reservoir to the measuring and dispensing chamber, 
     FIG. 5 is a view of the embodiment of FIGS. 1 to  4  shown with the sealing cap of the measuring and dispensing chamber removed and the container tilted to dispense a measured amount of liquid, 
     FIG. 6 is a sectioned elevation similar to FIG. 3 but showing a second embodiment of the invention, and 
     FIG. 7 is a side elevation of a third embodiment of the invention. 
    
    
     DESCRIPTION OF PREFERRED EMBODIMENTS 
     FIG. 1 shows a perspective view of a measuring and dispensing container  1  of the invention. The container includes a reservoir chamber  2  and a measuring and dispensing camber  3  isolated from the reservoir chamber in a manner to be described hereinafter. The reservoir chamber  2  is defined by side walls  4 , a bottom  5 , a front wall  6 , and a rear wall  7 . The reservoir chamber is stepped in its upper region to define a half-wall  8  and an upright wall portion  9  which, together with the side and rear walls  4 , 7 , defines an entrance region  10  for filing purposes. It will be appreciated that, although only one side wall  4  is shown, the opposite side wall of the container is a mirror image hereof. 
     The measuring and dispensing chamber  3  is located within the stepped region of the container and is secured to, but separated from, the reservoir chamber by webs or fillets  11 ,  12  created during molding of the container. 
     The measuring and dispensing chamber  3  has a bottom portion abutting the web  11  in the stepped area, front and side walls  13 ,  14  and a rear wall  15  abutting the web  12  which bridges the space between said rear wall  15  and the upright wall portion  9  of the container entrance region  10 . Upper walls  16 ,  17  of the entrance region  10  and measuring and dispensing chamber  3  respectively can lie substantially in the same plane or may have an angled upper wall portion  218 A,  218 B as shown in the embodiment of FIG.  7 . 
     Each of the upper walls  16 ,  17  terminates in an upwardly directed neck portion. FIG. 2 shows only the neck portion  19  disposed on the upper wall  17  of the measuring and dispensing chamber. Although not shown, a similar neck portion projects upwardly from the upper wall  16  and is closable by a cap  20 . Similarly a cap  21  is provided releasably to close the neck portion  19  which serves as a dispensing aperture. As shown in FIG. 2, the neck  19  is screw threaded  22  to mate with internal threads on the cap  21 . 
     As most clearly shown in FIGS. 3 and 4 of the drawings, the web  12  has a longitudinal bore  23  dimensioned to received a tube  24 , the purpose of which will become apparent from the following description. 
     It is particularly advantageous that the bore  23  be angled downwardly and rearwardly in the direction away from the measuring and dispensing chamber  3  so as to locate an open entrance end  25  of the tube  24  in a region proximate the bottom rear edge of the reservoir. Again as most clearly shown in FIGS. 3 and 4 of the drawings, the rear wall  15  of the measuring and dispensing chamber  3  has an opening extending into the bore  23  and in this manner a measuring ledge  26  is provided by the portion of the rear wall  15  which borders said opening. With the open end of the tube  24  disposed below this ledge  26 . The ledge becomes a weir over which liquid passing from the reservoir into the measuring and dispensing chamber will flow. Finally, a plug  27  seals the upper region of the bore  23 . 
     Although it would be possible to make the tube  24  an integral molding with the container, the provision of a removable plug  27  enables the tube  24  to be inserted into the bore  23  of a molded container whereupon replacement of the plug  27  will seal the interior chambers from atmosphere. 
     The use and operation of the container will now be described. With the container assembled as aforesaid and empty, the container reservoir  2  is then filled with liquid through the open neck on the upper wall  16  and passes through the entrance region  10  to adopt a level approximately as shown in FIG. 3 of the drawings. Thereupon the cap  20  is applied and both caps  20  and  21  are tightened to seal the filled container which may then be transported and stored. 
     To first measure, and then subsequently dispense, a predetermined volume of liquid, the container is held or stood in the upright position shown in FIGS. 1 through 4 of the drawings. Cap  21  is loosened to permit passage of air and the sides  4  of the container are squeezed which has the effect of forcing liquid from the reservoir chamber  2  up through the tube  24  and over the weir formed by the ledge  26 . FIG. 4 of the drawings shows this passage of liquid from the reservoir chamber to the measuring chamber. 
     The ledge  26  determines the volume of liquid with which the measuring and dispensing chamber is charged and when the liquid level in said measuring chamber  3  reaches or exceeds the level defined by the ledge  26 , the squeezing action on the side walls  4  of the container  1  is ceased and, with cap  21  still loosened, any liquid remaining above the level of the ledge  26  will flow back over that ledge and through the tube  23  in the reverse direction of that shown by the arrows in FIG.  4 . The loosened cap has the effect of venting the two chambers and ensuring that the liquid therein is at rest under atmospheric pressure. 
     Having measured the desired predetermined volume of liquid, the cap  21  is then removed to reveal the pouring neck  19  whereupon the container is tilted in an anticlockwise direction (with respect to FIGS. 1 to  4 ) to adopt a position similar to that shown in FIG. 5 of the drawings and the measured amount of liquid residing in the measuring and dispensing chamber will flow out through the neck  19  to a desired receptacle. 
     FIG. 5 further shows how during tilting the liquid remaining in the reservoir cannot penetrate the measuring and dispensing chamber  3  since the bore  23  is firmly sealed by the tube  24  and the remote, or entrance, end of that tube projects well above the surface of the liquid in the tilted reservoir thereby preventing any liquid passing through said tube and running into the measuring and dispensing chamber  3 . 
     FIGS. 6 and 7 show two alternative embodiments of a container of the invention. 
     The embodiment illustrated in FIG. 6 differs from that shown and described in FIGS. 1 to  5  in the construction of the barrier between the measuring and dispensing chamber  103  and the entrance region  110  to the reservoir chamber  102 . In this embodiment, the opening from the measuring and dispensing chamber  103  to the tube accommodating bore  123  is very much larger than the orifice shown in the embodiment of FIGS. 1 to  4  and does not present a weir which serves to control the level of liquid in the measuring and dispensing chamber  103 . Instead, the transfer tube  124  extends upwardly through the bore and the uppermost end is located above the uppermost extremity of the opening into the chamber  103 . In order for liquid to be able to pass from the tube  124  into the measuring and dispensing chamber  103 , an opening  130  is provided in the wall of the tube  124  and is oriented to provide passage from the tube into the chamber  103 . 
     The advantage of this arrangement is that by controlling the extent by which the tube  124  depends through the bore  123 , the position adopted by the lowermost extremity of the opening  130  will govern the depth of liquid to be accommodated in measuring and dispensing chamber. In other words, the volume of liquid to be measured in the measuring and dispensing chamber  103  can be controlled by axial movement of the tube  124  in the bore  103 . 
     It is, of course, important that the upper extremity of the tube  124  does not move to a position below the uppermost extremity of the substantial opening from the bore  123  into the chamber  103 . 
     Again, the bore  123  is angled downwardly and rearwardly with respect to the measuring and dispensing chamber  103  in order to ensure that the remote or entrance end  125  of the tube  124  is located in such a position that it will be clear of liquid within the reservoir upon tilting of the container to adopt the pouring position. This position is most clearly shown in the above-discussed FIG. 5 of the drawings. 
     The embodiment shown in FIG. 7 of the drawings similarly relies upon the application of pressure to the side walls of a flexible reservoir chamber  202  to transfer liquid from within that chamber through a tube  224  to pass into a measuring and dispensing chamber  203 . However, the predetermined volume of liquid to be measured in the measuring chamber is not governed by a weir or ledge over which liquid passes into the measuring and dispensing chamber and over which surplus liquid may exit to ensure a predetermined depth. Instead, the side walls  214  of the chamber  203  are transparent or translucent and a graduated scale  240  is scribed or otherwise marked on the chamber walls. 
     Again, an opening, in the form of a notch  230  is provided in the wall of the tube  224  at a location within the measuring and dispensing chamber  203 . Although the opening is in the form of a notch, it would, of course, be possible to have the liquid transferring from the reservoir chamber  202  through the tube  224  to exit that tube through the end located within the measuring and dispensing chamber  203 . 
     In use, with the reservoir chamber  202  filled, the cap  221  is loosened whereupon, with the container in the upright position shown in FIG. 7, the flexible walls of the reservoir chamber  202  are squeezed to force liquid to pass from the reservoir through the tube  224  and through the opening  230  into the chamber  203 . Squeezing is gently continued until the level of liquid in the measuring and dispensing chamber rises to the desired level indicated on the scale  240  whereupon the squeezing action is discontinued. In the embodiment shown in FIG. 7, the tube  224  would have to be moved upwardly if a greater depth indicated by the scale  204  were desired since the opening  230  must obviously be above the desired graduation. 
     Once the desired level is obtained in the measuring and dispensing chamber  203 , the cap  221  is removed whereupon the container is tilted in an anticlockwise direction, in a manner similar to that shown in FIG. 5, to pour the measured amount of liquid from the measuring and dispensing chamber  203 .