Pressure stopper for bottles and the like

Abstract

Destined to bottles whose neck ( 1 ) is of the revolution type and has a smooth internal surface, being constituted as from a cylindrical bushing ( 2 ) of a soft material, like, for example, rubber, with an outside diameter less than the inside diameter of the bottle neck ( 1 ), linked with what should be its external end in a perimetric flange ( 3 ) for leaning over the mouth ( 4 ) of said bottle. Inside this bushing ( 1 ), there are two rigid parts, an external part ( 5 ) likewise finishing externally in a discoidal head ( 6 ) and an inside part ( 9 ), in turn finishing internally in a trunco-conical head ( 10 ), these parts provided with a threaded neck ( 8 ) and a threaded and complementary pin ( 12 ), which permits the axial level of both parts as a whole to vary, by means of rotation in one or other direction of the discoidal head and externally ( 6 ), such that in the axial contraction of said rigid parts, the trunco-conical head ( 10 ) radially deforms the lower end of the bushing ( 2 ) against the inside surface of the bottle neck ( 1 ) causing an airtight and stable closure.

1 .- A pressure stopper for bottles and similar containers, provided with a revolution neck of internal and smooth surface, characterised by being constituted by means of the functional combination of three parts, one part ( 2 ) of soft material, configuring a cylindrical bushing with an external diameter according to the internal diameter of the bottle neck ( 1 ), a bushing which finishes in what should be the external or upper end of a flange ( 3 ), radially emerging outwards and destined to lean over the bottle mouth ( 4 ), collaborating with this soft part ( 2 ), a pair of parts ( 5 ) and ( 9 ) of rigid material, like, for example, plastic, coaxially intercoupled and with relative adjustable positioning, the external part ( 5 ) finishing at its end, also external, in a discoidal head ( 6 ), for leaning over the flange ( 3 ) of the soft part ( 2 ), while the inside part ( 9 ) of rigid material in turn finishes in a trunco-conical head ( 10 ), diverging towards its free end and with a maximum diameter suitable to permit its passage through the bottle neck ( 1 ), having foreseen that in the situation of maximum extension for the assembly consisting of the two rigid parts ( 5 ) and ( 6 ), the trunco-conical head ( 10 ) does not affect the cylindrical bushing ( 2 ) of the soft material part, while the axial contraction of the assembly consisting of said rigid parts provokes a radial deformation of the lower area of said bushing ( 2 ) against the internal wall of the bottle neck ( 1 ) and an axial deformation of the flange ( 3 ) against the front ( 4 ) of said bottle mouth:  
     
     
         2 .- A pressure stopper for bottles and similar containers according to  claim 1 , characterised in that the two rigid parts ( 4 ) and ( 5 ) are telescopically related to each other, with the possibility of varying the axial level of both parts as a whole by means a thread coupling ( 7 - 11 ), ( 8 - 12 ).  
     
     
         3 .- A pressure stopper for bottles and similar containers according to the previous claims, characterised in that the rigid external part ( 5 ) is provided with a threaded pin ( 7 ) whilst the rigid internal part ( 9 ) is provided with an internally threaded neck ( 11 ) receiving said pin ( 7 ).  
     
     
         4 .- A pressure stopper for bottles and similar containers, according to claims  1  and  2 , characterised in that the rigid external part ( 5 ) is provided with an internally threaded neck ( 8 ) whilst the rigid internal part ( 9 ) is provided with a threaded pin ( 12 ) corresponding with said neck ( 8 ).