Bottles and jars – Nursing bottles and nipples
Patent
1983-05-19
1985-10-08
Price, William
Bottles and jars
Nursing bottles and nipples
215 11D, 215 11B, A61J 904
Patent
active
045454914
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a feeding bottle.
It is a well known problem that ordinary feeding bottles give rise to the babies getting colic to a more or less pronounced degree, and at least care should be taken to make the babies burp from time to time during their sucking. The reason is that they tend to continue their sucking until a relatively high vacuum is produced in the bottle, whereby they cannot avoid sucking in false air from outside the bottle teat. Breast-fed babies are less liable to get colic, because the sucking does not create any increasing counter vacuum, and normally the necessary natural suction vacuum in the mouth of the baby does not cause any considerable intake of false air.
Principially it should seem easy to overcome the vacuum problem in connection with feeding bottles, since all what is necessary is to arrange for an air intake valve which is adjusted so as to admit air into the bottle whenever a moderate vacuum has been built up therein, whereby the baby may empty the bottle without at any time creating such a high vacuum as giving rise to the said false air intake. Correspondingly, several proposals for such a simple vacuum control function have already been made, but practice shows that they have obviously been inadequate, since they are practically unknown, despite the almost basal need for such a device.
The known proposals may be divided into two groups, one using manually operated air inlet valves and the other using automatic valves. The first group is generally uninteresting, because a manual valve will require the same high degree of attendance as otherwise required for causing a break in the sucking, by pulling out the teat from the baby's mouth every now and again for enabling the vacuum in the bottle to be steadily kept at a low level. It is of course the automatic valves which are of primary interest, and again it is worth noting that such valves have not found their way to practical use, even though automatic air intake valves are known in many varieties from various fields of the technique, generally.
However, as far as feeding bottles are concerned, it will be a major requirement that the details of the air intake valve should be cheap simple and robust and well suited to be separated for general cleaning and reassemblable by absolutely non-skilled persons, and at the same time the valve system shall be fully tight against leakage of milk and yet highly sensitive so as to react to the building up of a moderate vacuum in the feeding bottle with a reasonably high degree of accuracy.
A basic possibility of an intake valve design is to use a valve member of a rubber sheet material placed against an apertured rigid wall portion of the bottle, e.g. against the inside of a separate bottom closure cap, see the Danish Patent Specification No. 143,484 and the French Patent Specification No. 1,058,610. For tightly closing the valve against outflow of milk the rubber sheet shall have to be stretched so as to be tensioned against the wall, and when the rubber sheet, as desirable, is a robust and reasonably thick element it will be very difficult to provide for such fine tolerances that the tensioned sheet will open for air intake with the required accuracy as to the vacuum response.
More specifically the invention relates to a feeding bottle having a suction outlet and an air intake valve, which is located spaced from the suction outlet and comprises an interior resilient valve sheet member cooperating with an apertured rigid wall portion of the bottle so as to constitute a check valve operable to open for admission of air into the bottle in response to a predetermined vacuum occurring therein, and it is the purpose of the invention to provide such a bottle, which may show an accurate vacuum response and yet be of a robust design.
In accordance with the present invention, a feeding bottle is provided wherein the resilient valve sheet member is mounted or mountable so as to be generally stretched over a convex surface of the rigid wall portion in which an air inlet hole
REFERENCES:
patent: 1441406 (1923-01-01), Dales
patent: 1938052 (1933-12-01), Speir
patent: 2043186 (1936-06-01), O'Dette
patent: 2321236 (1943-06-01), Parkin
patent: 2379562 (1945-07-01), Boxley
patent: 2394722 (1946-02-01), Sloane
patent: 2456337 (1948-12-01), Soper
Bisgaard Hans F.
Jensen Jorgen D.
Jensen Jens C.
Price William
Weaver Sue A.
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