| 摘要 |
<p>The invention aims at providing a pump for dispensing a liquid spray, ensuring high and long-lasting tightness. Therefor, the invention is based on optimization of the link between the single-piece seal (13) of the liquid container, the piston (4) and the central chamber. The inventive pump is characterized in that it comprises: a push button (3) mounted on a valve (2) co-operating with a central chamber (1) containing a piston (4) for access to the spraying unit separating the body into two cavities (5a, 5b), a single-piece seal (13) fixed on the central chamber and designed for mounting a container containing the liquid to be sprayed, and a liquid input ball-valve (10) in the central body. A sealed double contact is formed by the external tubular structure (22) of the piston (4). An end portion (22) of said structure is urged to be received in the single-piece seal (13). A portion at its other end (L1) is urged into sealed contact against the inner wall (1a) of the chamber (1).</p> |
