Patent ID: 6830230
Filing Date: 2004-12-14
Classification: B65D,F16K

Abstract:
Air blast device comprising an air flow control device disposed between an inlet conduit and an outlet conduit, said air flow control device comprises a first main valve (2A), a rear chamber (13) defined by said first valve and an evacuation valve (16) that controls flow of the air contained in the rear chamber (13) to an outlet conduit (5), said air contained in the rear chamber holding the main valve (2A) in a first seat (2B), said main valve being movable away from said first seat in response to actuation of said evacuation valve, a second seat (17) for said evacuation valve (16) located at the level of a front face (2C) of the main valve (2A), and wherein said evacuation valve (16) is adapted to move forward in a direction opposite that of the main valve (2A) as said main valve leaves the first seat (2B) in order to evacuate the air contained in the rear chamber.