A system and method are provided for selectively containing and dispensing a predetermined liquid material in and from a source container in failsafe manner, wherein a housing is disposed to receive a pressurized fluid stream, and a selectively operable valve assembly is disposed in a flow path defined...http://www.google.sh/patents/US7566013?utm_source=gb-gplus-sharePatent US7566013 - System for failsafe controlled dispensing of liquid material
