Patent ID: 6422273
Filing Date: 2002-07-23
Classification: B09B,B65B

Abstract:
An evacuation system comprising:a releasing device for releasing pressurized gaseous materials, said releasing device including a check valve for allowing flow of said pressurized gaseous materials away from said releasing device in a first direction, but not allowing it to return in an opposite direction; a receptacle communicating with the releasing device and receiving the pressurized gaseous materials; a filter assembly comprising a housing for communicating with the receptacle, said housing containing filter material; wherein said filter assembly further includes a valve comprising a movable valve member for moving in an opposite direction to gaseous materials flowing through said filter assembly for stopping flow of said pressurized gaseous materials from said receptacle through said filter assembly and for moving in the direction of gaseous materials flowing through said filter assembly for allowing said flow; whereby said evacuation system is a closed system.