Nursing bottle

Bottles and jars – Nursing bottles and nipples

Patent

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Details

215 11D, 215 11E, A61J 904

Patent

active

043390463

ABSTRACT:
A nursing bottle unit includes an open-ended elongated tubular nursing holder having a neck portion at one open end thereof, a disposable and collapsible liquid-retaining bag open at one end thereof, received within the tubular nursing holder, a plug member at least partially received within the neck portion adapted to clamp a portion of the bag against the internal surface of the neck portion, and a nipple mounted on the neck portion. The plug member has an axial bore formed therethrough and a one-way check valve associated therewith for allowing liquid to be withdrawn from the bag while serving to prevent the entry of air thereinto. In addition, a piston or valve member is provided which, upon withdrawal of the liquid from the bag and as a result of the vacuum generated in the bag and the prevailing ambient atmospheric pressure, causes the bag to collapse so that the effective inner volume of the bag always substantially equals the volume of the liquid remaining therein.

REFERENCES:
patent: 951419 (1910-03-01), Eberley
patent: 2979078 (1961-04-01), Witz
patent: 3931886 (1976-01-01), Yamauchi
patent: 4010861 (1977-03-01), Welten

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