Dispensing – Inspection devices – Graduated transparent container or trap
Reexamination Certificate
2000-03-31
2001-09-18
Derakshani, Philippe (Department: 3754)
Dispensing
Inspection devices
Graduated transparent container or trap
C222S205000
Reexamination Certificate
active
06290102
ABSTRACT:
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
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Jennings David Allen
Jennings Robert Michael
Bui Thach H
Derakshani Philippe
Ladas & Parry
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