A flow control device has an inlet, an outlet and a conduit connecting the inlet to the outlet enabling fluid flow from the inlet to the outlet. A movable head with a slot therethrough seals the inlet. The head is connected to elongated legs which are flexed when the head is moved out of the inlet, opening...http://www.google.fr/patents/US6068011?utm_source=gb-gplus-shareBrevet US6068011 - Control of fluid flow
