Patent ID: 7614527

Claim:
Valve suitable for filling, with a polymerizable material, a cavity ( 10 ) for molding an optical lens, especially an ophthalmic lens, which valve ( 2 ) includes a material inlet orifice ( 7 ), a material outlet orifice ( 8 ), an orifice ( 9 ) for ejecting material into said cavity ( 10 ), and a distributor ( 16 ) for putting into communication with each other or isolating from each other the material inlet orifice ( 7 ), the material outlet orifice ( 8 ) and the ejection orifice ( 9 ), which valve is characterized in that: it includes a dosing chamber ( 20 ) connected to said distributor ( 16 ), a mobile piston ( 18 ) whose position fixes the volume of said dosing chamber ( 20 ), means ( 19 ) for controlling the position of said mobile piston ( 18 ), and means ( 24 ) for controlling the position of said distributor ( 16 ); the inlet orifice ( 7 ) and the outlet orifice ( 8 ) are in permanent communication; and said distributor ( 16 ) has a first position ( 21 ) in which said material inlet orifice ( 7 ) and said material outlet orifice ( 8 ) are in communication with said dosing chamber ( 20 ) and in which said ejection orifice ( 9 ) is isolated from said material inlet orifice ( 7 ), from said material outlet orifice ( 8 ) and from the dosing chamber ( 20 ), and has a second position ( 23 ) in which said material inlet orifice ( 7 ) and said material outlet orifice ( 8 ) are isolated both from the dosing chamber ( 20 ) and from the ejection orifice ( 9 ) and in which the dosing chamber ( 20 ) and the ejection orifice ( 9 ) are in communication with each other.