Vacuum bottle having a tilt responsive closure

Claim 1

A vacuum bottle manually operated safety pump comprising: a cover portion, said cover portion including a top portion, said top portion including a centrally positioned horizontally extending aperture; an outer push element, said outer push element including a radially outwardly extending flange, said radially outwardly extending flange being adapted to abut an inner face of said top portion adjacent the horizontally extending aperture; an inner push element, said inner push element being positioned partially within said outer push element, said inner push element being operatively connected with said outer push element; a pressure means, said pressure means comprising a bellows having a horizontal top wall, a horizontal bottom wall and a flexible side wall interconnecting said top and bottom walls, said top wall being operatively connected to said inner push element, said bottom wall including a centrally positioned opening communicating with the interior of said bellows: a plug element, said plug element comprising a horizontally extending top plug wall having a centrally positioned aperture, a plug bottom wall spaced from said plug top wall, said plug bottom wall including a plurality of ports, said ports providing fluid communication between interior of said bellows and the interior of said vacuum bottle and a chamber formed between said upper and lower plug walls; valve means, said valve means being positioned between said centrally positioned opening in said bellows bottom wall and said centrally positioned aperture in said top plug wall for providing an air-tight connection between said bellows interior and said plug element chamber; a vertically extending cylindrical member within said plug element separated from said chamber; a receiving portion formed in a lower portion of said cylindrical portion; a liquid draw-up tube positioned within said vacuum bottle, said draw-up tube having an upper end in fluid-tight communication with said receiving portion of said cylindrical member; a liquid discharge outlet, an interior end of said discharge outlet being in fluid-tight connection with an upper portion of said cylindrical member and an exterior end of said discharge outlet communicating to the exterior of said vacuum bottle; closure means positioned between said cylindrical member lower portion and said draw-up tube upper end, said closure means comprising a vertically positioned inverted truncated cone element having a cylindrical neck portion formed as a continuous extension of the lower end thereof for mounting said draw-up tube upper end, and a radially inwardly extending horizontal upper wall having a central aperture formed therein, said cylindrical neck and said truncated cone upper wall aperture being axially aligned with said vertically extending cylindrical member, and a cooperating inverted cone-shaped closure element movable relative to said inverted truncated cone element, said closure element having a horizontally extending upper face, wherein when said vacuum bottle is in an upright position fluid is permitted to flow up said draw-up tube and through said closure means and vertically extending cylindrical member and out said liquid discharge outlet upon manual depression of said outer push element and when said vacuum bottle is in an inverted position said closure element horizontally extending upper face seats against said truncated cone upper face thereby fluidly sealing said truncated cone upper face aperture and preventing the flow of fluid to said vertically extending cylindrical member.