ADAPTER FOR THE SELECTIVE INVERTED ACTUATION OF PUMP DISPENSERS

摘要

The invention relates to a dispenser (10) comprising a pump housing (14) with an adapter (12) for a container that contains fluid. Said dispenser comprises an adapter housing (24) with a passage (20) and inlets (28) for the fluid, an inlet valve (30) that is located in an annular chamber (51) and a non-return valve (32) that is located in a valve chamber (34). The adapter housing (24) consists of an upper part (44) and a lower part (46), which form the annular chamber (51), the latter being centrally traversed by a connecting pipe (52). A base (50) of the annular chamber (51) contains fluid inlets (28) for the inverted position of the dispenser (10) and comprises a fluid-tight collar (60) that projects radially beyond the inlets (28). The inlet valve (30) is an annular, flexible elastic valve disc (31), which surrounds and seals the annular groove (58) and whose external edge lies on the fluid-tight collar (60), sealing the inlets (28). In the inverted position of the adapter (12) however, the inlet valve is lifted off the fluid-tight collar (60) in order to open the inlets (28). The dispenser (10) permits an operationally reliable actuation in the normal upright position and in the inverted position. It has a simple construction and is thus economical to produce.