| 摘要 |
<p>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).</p> |
