Patent ID: 7793807

Claim:
A metering valve for dispensing fluid, the metering valve comprising a valve body ( 10 ), a metering chamber ( 20 ), and a valve member ( 30 ) that is slidable in said valve body ( 10 ) so as to dispense the fluid contained in the metering chamber ( 20 ), said metering chamber ( 20 ) comprising a top orifice ( 25 ), and a bottom orifice ( 26 ), said valve member ( 30 ) passing through said top and bottom orifices ( 25 , 26 ), a circularly-cylindrical wall ( 27 ) defining said metering chamber ( 20 ) by interconnecting said top and bottom orifices ( 25 , 26 ), said metering chamber comprising two curved portions that are curved or rounded radially inwardly, at least in part, in an axial section so as to be concave with respect to the inside of the metering chamber and so that said curved portions do not form any angles; one of the curved portions located axially between the top orifice and the circularly-cylindrical wall and the other curved portion located axially between the bottom orifice and the circularly-cylindrical wall.