| 摘要 |
<p>The invention realizes a cap with spray pump (1) of a container (C) holding a liquid to be sprayed under the form of foam and comprising: at least one hollow body (3), enclosing an air-liquid mixing chamber (4); a first piston (8) sliding in said at least one hollow body (3); a second piston (12) sliding in said first piston (8), its inside having at least one tubular chamber (13) that connects with at least one spraying duct (14) for said foam towards the outside and at least one connecting duct (15) to said mixing chamber (4); elastic devices (16) inserted between at least one of said pistons (8, 12) and said at least one hollow body (3); first valve devices (17) fitted downstream to said first air suction duct (5) and said suction duct (7) for said liquid; means of filtering (18) mounted upstream and/or downstream of said tubular chamber to favour the formation of said foam during spraying. Said valve devices (17) comprise a first cut-off system (19) suited to close said suction inlet (6) when said first piston (8) is aligned with said suction inlet (6).</p> |
