| 摘要 |
<p>The invention concerns a fluid product dispensing pump comprising a pump body (10) including a pump chamber (11) delimited between a high piston (20) and a low piston (30), said pistons 820, 30) sealingly sliding in said pump body (10), said pump chamber (11) including an inlet valve (40) and an outlet valve (50), said low piston (30) co-operating, when the dose is filled up, with the outlet valve (50) to cause it to open and allow the product contained in the pump chamber (11) to be expelled. The invention is characterised in that the low piston (30) is separated from the inlet valve seat (42) and is mounted floating in the pump chamber (11) said low piston (30) being returned to its neutral position by said inlet valve seat (42).</p> |
