MANUAL DISPENSER DEVICE TO BE APPLIED WITH NO GASKET TO THE MOUTH OF A BOTTLE

Abstract: The present invention relates to a manual dispenser device (1) to be applied with no gasket to the mouth (2) of a bottle (3) containing a more or less dense liquid substance, pump held fast thereto by a ring nut (4) mounted on to the threaded neck (5) of the bottle. The pump (1) comprises a hollow body (6), with check valve (9); a hollow stem (10), movable coaxially to the hollow body (6), bearing an outflow push-button (11); a piston (12) inserted on the stem (10) and movable within the hollow body (6), in which it defines a pressure chamber (14); at least one elastic return means for the stem (10) and the piston (12); an element (15) for closing the hollow body (6). The hollow body (6) presents at its top a folded-back lip (16) shaped into an inverted V cross section and circumscribing the bottle mouth (2).

Description: Manual dispenser device to be applied with no gasket to the mouth of a bottle The present invention relates to a manual dispenser device to be applied with no gasket to the mouth of a bottle containing a more or less dense liquid substance, pump which is held fast thereto by a ring nut mounted on the threaded neck of said bottle. The manual pump of the type mentioned above comprises a hollow body, with check valve; a hollow stem, movable coaxially to said hollow body, bearing an outflow push-button; a piston, inserted on said stem and movable within said hollow body, in which it defines a pressure chamber; separate elastic return means for said stem and said piston; an annular element closing the hollow body. Dispenser devices ofthe prior art present a hollow body whose upper portion is shaped, in the vicinity of the outflow push-button, into an edge with radial development destined to be held against the rim of the mouth of the bottle by a ring nut screwed on to the threaded neck of the bottle. In certain embodiments, this edge of the hollow body is flat and it is destined to rest on an annular gasket placed on the mouth ofthe bottle. In other embodiments, this edge ofthe hollow body has a lip whose free end is set against the rim of the mouth of the bottle. In the embodiments with gasket, the seal preventing leakage ofthe more or less dense liquid substance contained in the bottle is satisfactory, but the inclusion of the gasket increases manufacturing and assembly costs. In particular, the gasket is generally made of an elastic material, which differs from the other plastic materials making up the pump and the bottle, resulting in differentiated recycling problems. In the embodiments with rabbet lip, the seal is generally less satisfactory, especially in that it entails the accurate machining of the surface of the mouth rim, in which the seal is essentially linear. The latter type of embodiment mentioned above, however, presents the problem that the radially developed edge of the hollow body of the pump must be dimensioned to fit the particular bottle mouth. However, commercially available bottles, even of the same type and size, may present dimensional or shape differences also in their mouth profile, and thus different pump hollow bodies, if not indeed different pumps, must be provided for the various commercial bottle mouth sizes. The purpose of the present invention is therefore to eliminate the drawbacks mentioned above. In particular, the purpose of the present invention is to achieve a better seal between hollow body and bottle, without adding different means, such as gaskets and the like, and without entailing an increase in manufacturing costs. Yet another purpose of the present invention is to embody dispenser devices destined to be applied with their hollow bodies on to a wide range of bottle mouth sizes, with the resulting reduction in production costs. The invention, as characterised by the claims which follow, solves the problem of providing a manual dispenser device to be applied with no gasket to the mouth of a bottle containing a more or less dense liquid substance, and held fast thereto by a ring nut mounted on the threaded neck of said bottle, the pump being of the type comprising an essentially cylindrical hollow body, open at its ends, with a check valve being fitted in correspondence with a first end; a hollow stem, movable coaxially to said hollow body, an end of said stem, protruding outside through the second end of said hollow body, bearing an outflow push-button; a piston, inserted on said stem and movable within said hollow body, the internal part of the hollow body between said piston and said check valve defining a pressure chamber; at least one elastic return means for said stem and said piston; an annular element closing said second end of said hollow body, said closing element also serving as a guide for said stem, which in general is characterised in that said hollow pump body presents at its top, in proximity of its said second end, a folded-back lip shaped into an inverted V cross section and circumscribing said bottle neck mouth, by means of one of its portions inclined outward and one of its portions inclined inward, with respect to said body, portions which are respectively in circumference contact, in their internal sides, with an external rim and with an internal rim of said mouth. Additional characteristics and advantages of the present invention shall be made clearer in the detailed description that follows, of a preferred form of embodiment illustrated purely by way of indicative but non limiting example in the accompanying drawings in which: - Figure 1 illustrates, half in central longitudinal section and half in vertical view, a dispenser device according to the present invention; - Figure 2 illustrates in enlarged section a detail A of Figure 1. In accordance with the present invention, the Figures indicate as 1 the whole of a manual dispenser device to be applied with no gasket to a mouth 2 of a bottle 3, held fast thereto by a ring nut 4 mounted on the threaded neck 5 ofthe bottle 3. Traditionally, the pump 1 comprises in general a hollow body 6, which is essentially cylindrical with different diameters, and is open at its ends, which are a first end, referred to hereafter as bottom end 7, and a second end, or top end 8, as a result of the relative position with respect to bottle 3 after mounting on the mouth 2 ofthe bottle. In correspondence with the bottom end 7 is fitted a check valve 9. The pump 1 also comprises a hollow stem 10, movable coaxially s on the hollow body 6. The end of the stem 10, protruding outside through the top end 8 ofthe hollow body 6, bears an outflow push-button 11. On the hollow stem 10 is inserted a piston 12, movable within the hollow body 6. The internal part 13 of the hollow body 6 between the piston 12 and the check valve 9 defines a pressure chamber 14. o As is well known, though they are not represented in the Figures, elastic return means are provided, in the form of helical springs for the stem 10 and die piston 12. Their operation is known, so they are not described further. Lastly, there is an annular element IS for closing the top end 8 of the hollow body 6, which closure element 15 also serves as a guide for the stem 10. 5 According to the present invention, the hollow body 6 ofthe pump 1 presents in proximity of its top end 8 a folded-back lip 16 whose cross section is shaped as an inverted V. This folded-back lip 16 circumscribes the bottle mouth 2, by means of its first portion 16a inclined outward and its second portion 16b inclined inward, with respect to the body 6. When mounted on to the bottle 0 mouth 2, the portions 16a, 16b of the folded-back lip of the hollow body are respectively in contact, in their internal sides, with an external rim 2a and an internal rim 2b of the mouth 2. The folded-back lip 16 preferably has a flat bottom 16c, but this bottom could also be embodied as a sharp edge (not represented). 5 In particular, the portion 16a inclined outward approximately presents, on the external side, an inclination corresponding to that of an internal lateral profile 4a ofthe ring nut 4. The flat bottom 16c ofthe folded-back lip 16 is destined to be set against an internal base profile 4c ofthe ring nut 4. By way of non limiting indication, the inclination of the portion 16a inclined outward is at an angle of about 45°, whereas the inclination of the portion 16b inclined inward is at an angle of about 30°. The invention thus conceived can be subject to numerous modifications and variations without thereby departing from the scope of the inventive concept. Moreover, all components may be replaced with technically equivalent elements. In practice, modifications and/or improvements are clearly possible, without thereby departing from the scope ofthe claims that follow.

Claims: Claims 1. Manual dispenser device to be applied with no gasket to the mouth (2) of a bottle (3) for a more or less dense liquid substance, and held fast thereto by a ring nut (4) mounted on to the threaded neck (5) of said bottle (3), the pump being ofthe type which comprises: - a hollow body (6), essentially cylindrical, open at its ends (7, 8), a check valve (9) being provided in correspondence with a first end (7); - a hollow stem (10), movable coaxially to said hollow body (6), an end of said stem, protruding outside through the second end (8) of said hollow body (6), bearing an outflow push-button (11); - a piston (12), inserted on said stem (10) and movable within said hollow body (6), the internal part (13) of the hollow body (6) between said piston (12) and said check valve (9) defining a pressure chamber (14); - at least an elastic return means for said stem and said piston; - an annular element (15) for closing said second end (8) of said hollow body (6), said closure element (15) serving also as a guide for said stem (10); characterised in that said hollow pump body (6) presents at its top, in proximity of its said second end (8), a folded-back lip (16) shaped into an inverted V cross section and circumscribing said mouth (2) of the bottle neck (5), by means of its portion (16a) inclined outward and its portion (16b) inclined inward, with respect to said hollow body (6), portions (16a, 16b) which are respectively in circumference contact, in their internal sides, with an external rim (2a) and an internal rim (2b) of said mouth (2). 2. Pump according to cla , characterised in that said folded-back lip (16) of the hollow body (6) presents a flat bottom (16c) between its said portion (16a) inclined outward and its said portion (16b) inclined inward. 3. Pump according to claim 1, characterised in that said portion (16a) inclined outward of said hollow body folded-back lip (16) presents, on its outer side, an inclination corresponding to that of an internal lateral profile (4a) of said ring nut (4). 4. Manual dispenser device to be applied with no gasket to the mouth of a bottle according to the previous claims and according to what has been described and illustrated with reference to the Figures of the accompanying drawings and for the purposes mentioned.

Inventors: MASCITELLI FRANCESCO, MASCITELLI, FRANCESCO
Applicants: MASCITELLI FRANCESCO, SAR SPA, MASCITELLI, FRANCESCO, SAR S.P.A.
Application year: 1997
Main classification: B05B11
IPC codes: B05B11, B65D25, B65D83