Patent ID: 8167002

Claim:
A flow restrictor ( 1 ) for limiting a volume flow through a liquid line ( 2 ), comprising: a carrier ( 10 ) with a passage and a bent flat form spring ( 11 ) which is attached to the carrier ( 10 ) and which is designed to be flattened increasingly with a rising differential pressure (Δp), wherein, the flat form spring ( 11 ) has at least one spring tongue ( 12 , 17 , 19 ), wherein, the passage comprises at least two orifices ( 13 , 18 ) lying next to one another, the spring tongue ( 12 , 17 , 19 ) and the orifices ( 13 , 18 ) having an essentially identical extent in each case in a longitudinal direction, wherein, the carrier ( 10 ) comprises at least one web ( 14 ) which in each case separates two orifices ( 13 , 18 ) lying next to one another from one another, and wherein, each spring tongue ( 12 , 19 ) is configured and arranged above the orifices ( 13 , 18 ) so that, with a rising differential pressure (Δp), said spring tongue increasingly lies upon the web ( 14 ) and continuously reduces the orifices ( 13 , 18 ), in order to reduce the passage continuously within a defined pressure range, the orifices ( 18 ) remaining open in defined remaining regions.