Patent ID: 8910505

Claim:
A blast tube comprising: a first portion having a first inlet valve, a first outlet valve, a first length and a first cross section; a second portion, adjacent to the first portion and having a second inlet valve, a second outlet valve, a second length and a second cross section; a third portion, adjacent to the second portion and having a third inlet valve, a third outlet valve, a third length and a third cross section; a first diaphragm operable to switch from a closed state to an open state at a first time, said first diaphragm being disposed between said second portion and said third portion; a second diaphragm operable to switch from a closed state to an open state at a second time after the first time; and a third diaphragm operable to switch from a closed state to an open state at a third time after the second time, said third diaphragm being disposed between said first portion and said second portion, wherein said third portion is disposed between said first diaphragm and said second diaphragm.