Patent ID: 8087523

Claim:
A closure assembly for a baby's bottle having an open outlet mouth, said closure assembly comprising: a regulator cap adapted to be engaged with the mouth of said bottle to secure said cap to said bottle and substantially close said mouth, said regulator cap having one or more apertures therein for flow of fluid from said bottle and air into said bottle, a teat collar positioned over the regulator cap, said teat collar having a side wall or skirt, said side wall having a thread on its inside surface for cooperation with an external thread on the bottle adjacent the mouth of the bottle, said collar further including a top wall having a central opening, and stop means for limiting rotation of said teat collar relative to said bottle, said stop means comprising an inwardly directed stop member or members on the inside of the side wall or skirt of the teat collar and an outwardly directed stop member on said bottle, respective stop members on said collar and said bottle being adapted to abut each other when the teat collar has been rotated a predetermined distance relative to said bottle to define open and/or closed positions respectively of the closure assembly, and a teat projecting through said central opening in said top wall of the teat collar and having an outlet for passage of fluid, said teat having a flexible base flange, and wherein in said first position of said teat collar, fluid can pass through one or more said apertures in the regulator cap and through said teat outlet with air flowing from externally of the bottle and past said base flange into said bottle through one or more said apertures in the regulator cap when a suction pressure is applied to said teat, and wherein when said teat collar is in said second position, said base flange is compressed against said regulator cap to prevent air from passing into said bottle and fluid is substantially prevented from passing from the bottle through said one or more apertures in the regulator cap into the teat.