公开(公告)号：EP2024640A2

公开(公告)日：2009-02-18

申请号：EP07735883.6

申请日：2007-05-14

申请人： Nomet Management Services B.V.

发明人： Navarro, Thierry

IPC分类号： F04B7/00 ,  F04B19/02

CPC分类号： F04B7/0007 ,  F04B9/047 ,  F04B19/022

摘要： A volumetric pump comprises at least one piston (1) inside a cylindrical housing (2) and means to cause a relative to-and-fro linear movement between the cylindrical housing (2) and the piston (1) in order to produce a stroke of the volumetric pump. This pump further comprises a bi-directional angular rotatable disc (4) acting as a valve which connects alternately at least one inlet port and at least one outlet port (5, 5') to a least one pump chamber (6, 6') located inside the housing (2), and a driving mechanism arranged to dissociate at least partially the bi-directional angular movement of the rotatable disc (4) with the to-and-fro linear movement of the housing (2). This driving mechanism is arranged such that the rotatable disc (4) reaches an angular position at which it opens and/or closes the inlet and/or outlet ports (5, 5') when there is no relative to-and-fro linear movement between the cylindrical housing (2) and the piston (1).