Nursing bottle

Claim 2

A nursing bottle, comprising: a cylindrical tube having a uniform internal diameter, the opposite ends of said tube having external threads formed thereon; a suction nipple; a first cap receivable over said suction nipple, and engageable with the external threads on one end of said cylindrical tube for securing said nipple to said one end; a piston slidably received within said cylindrical tube, and dividing said tube into a first portion facing toward said one end of said tube and adapted to receive liquid to be dispensed through said suction nipple, and a second portion facing toward the other end of said tube; a thin foil valve element having a diameter greater than the uniform internal diameter of said cylindrical tube, and engageable with the other end of said cylindrical tube; a valve plate positioned on the outside of said thin foil valve element, said valve plate and said thin foil valve element having non-aligned flow opening means therein arranged to be closed when said thin foil valve element is in engagement with said valve plate; and removable means for detachably connecting said valve plate and said thin foil valve element to said other end of said cylindrical tube.

Claim 3

A nursing bottle as recited in claim 1, wherein said removable means and valve plate comprise a second cap having an end wall and an internally threaded cylindrical flange, said flange being threadable on said externally threaded other end of said cylindrical tube, and said end wall forming said valve plate and being integral with said cylindrical flange.

Claim 4

A nursing bottle as recited in claim 2, wherein said second cap end wall forming said valve plate includes an inwardly directed domed portion positioned centrally thereof, and of smaller diameter than the uniform internal diameter of said cylindrical tube, said flow opening in said valve plate being located within said domed portion.

Claim 5

A nursing bottle as recited in claim 3, wherein said flow opening in said thin foil valve element is located in the portion of said valve element engageable with said domed portion of said valve plate.

Claim 6

A nursing bottle, comprising: a cylindrical tube having a uniform internal diameter, one end of said cylindrical tube having a suction nipple secured thereto, and the other end thereof terminating in a flat, annular end face, and having external threads formed thereon; a piston slidably received within said cylindrical tube, and dividing said tube into a first portion facing toward said suction nipple and adapted to receive liquid to be dispensed through said suction nipple, and a second portion facing toward the other end of said tube; a thin foil valve element having a diameter greater than the uniform internal diameter of said cylindrical tube, the outer annular peripheral portion of said valve element being engageable with said flat, annular end face of said cylindrical tube; and a cap member comprising a generally radial end wall formed integrally with an internally threaded cylindrical flange, said flange being threadable on said externally threaded other end of said cylindrical tube, and said end wall including a flat, annular peripheral portion engageable with said outer annular peripheral portion of said valve element to clamp such to said flat, annular end face of said cylindrical tube, and an inwardly directed, central domed portion forming a valve plate engageable by said thin foil valve element, said valve element and said domed portion having non-aligned flow opening means therein arranged to be closed when said thin foil valve element is in engagement with said inwardly directed domed portion.

Claim 7

A nursing bottle, comprising: a cylindrical tube having a uniform internal diameter, one end of said cylindrical tube having a suction nipple secured thereto, and the other end thereof terminating in a flat, annular end face, and having external threads formed thereon; a piston slidably received within said cylindrical tube, and dividing said tube into a first portion facing toward said suction nipple and adapted to receive liquid to be dispensed through said suction nipple, and a second portion facing toward the other end of said tube; a thin foil valve element having a diameter greater than the uniform internal diameter of said cylindrical tube, the outer annular peripheral portion of said valve element being engageable with said flat, annular end face of said cylindrical tube; and a cap member comprising a generally radial end wall formed integrally with an internally threaded cylindrical flange, said flange being threadable on said externally threaded other end of said cylindrical tube, and said end wall including a flat, annular peripheral portion engageable with said outer annular peripheral portion of said valve element to clamp such to said flat, annular end face of said cylindrical tube, and an inwardly directed, central domed portion forming a valve plate engageable by said thin foil valve element, said valve element and said domed portion having non-aligned flow opening means therein arranged to be closed when said thin foil valve element is in engagement with said inwardly directed domed portion.