Dispensing – With discharge assistant – Movable or conveyer-type trap chamber
Patent
1989-11-17
1991-02-12
Shaver, Kevin P.
Dispensing
With discharge assistant
Movable or conveyer-type trap chamber
G01F 1110
Patent
active
049917480
DESCRIPTION:
BRIEF SUMMARY
The invention is a device for dispensing portions of grainy media, in particular pellects, from the storage space in a housing, having a dispensing opening near the bottom of the housing, which can be closed by means of a hand-operated actuator. The actuator has a dosing chamber, the internal end of which is partitioned off (partition wall) from the storage chamber in the dispensing position. In the dispensing position, the external end of the dosing chamber is aligned with the dispensing opening, whereby the size of the dosing chamber, which has a sloping roof inclined in the dispsnsing direction, is much greater than the diameter of the pellets.
A device of this nature is the subject of the applicant's German patent application No. P35 35 292.2. In the case of smaller pellets, there is a danger that they will become jammed in the area between the storage chamber and the dosing chamber, partly as a result of the amount of clearance and partly because the media being dispensed are not always exactly spherical. In the worst case, this can result not only in the mechanism becoming jammed, but even in one or more of the pellets being crushed.
The purpose of the invention is to develop a device of the type described, without adding any additional components, in such a way that it is simple to construct and so that the smallest quantities can be dispensed, easily, exactly and free from interference.
In accordance with the present invention, a portion of the cover adjacent the storage space defines an auxiliary dosing chamber. The auxiliary dosing chamber has a depth which corresponds approximately to the diameter of a pellet. In addition, the portion of the cover defining the auxiliary dosing chamber has upper flanks which converge toward one another and end in an upwardly directed notch which is narrower that the diameter of a pellet.
As a result of such a design, a device of this type has been created which is simple to use and will ensure that the dosage will be dispensed without interference. It will be separated extremely gently from the remaining quantity. It is impossible for the pellets to become jammed or broken. Construction is simple and practical. This has been achieved as follows: the initial part of the cover nearest to the storage area forms an auxiliary dosing chamber, the depth of which is approximately equal to the diameter of a pellet. Its upper flanks converge with one another, and terminate in a notch which tapers upwards. Beacause of the bulkhead separation, only a few pellets flow into the auxiliary dosing chamber, and any surplus pellets are then expelled in good time, gently and undamaged, before the tapering notch disappears below the crest, i.e. the upper edge of the partition wall. To all intents and purposes, the pellets roll out over the flanks of the tapering notch and to all intents and purposes therefore sit there in the form of a point. They are separated out in a particular direction, i.e. in the opposite direction to that in which the pellets entered. Thereby, it proves advantageous that the width of the tapering notch is smaller than the diameter of the pellets. In order to optimize the gentle separation of the dosage from the remaining quantity, the invention suggests that the upper edge of the partition wall be inclined inwards, i.e. towards the storage chamber. The alignment represents a kind of "counter", which deflects the pellets over the back of the knife edge in the direction of the storage chamber. The pellets drop, to all intents and purposes, over the back of the knife edge. It is also helpful to the solution of the problem that there is a kink in the middle section of the cover. The entrance to the dosing chamber is extremely large but, as a result of the kink, there is, at the same time, a slight enlargement on the exit side, whereby the cover and floor of the dosing chamber converge in the dispensing direction. It is also an advantage if the cover is transversely grooved.
The related curvature results not only in the stabilization of the cover of the dosing cha
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patent: 3201007 (1965-08-01), Transeav
patent: 3353723 (1967-11-01), Wieleba
patent: 4724984 (1988-02-01), Wilken et al.
Hackmann Ludger
Sieverding Werner
Wilken Josef
ByK Gulden Lomberg Chemische Fabrik GmbH
Shaver Kevin P.
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