Patent ID: 7050709

Claim:
A smoke producing system, comprising; a smoke producing device defining a heating chamber, the smoke producing device comprising: an outer wall extending about the heating chamber, the outer wall having a first end and a second end; an inner wall positioned in the heating chamber defined by the outer wall; a first end wall mounted on the first end of the outer wall for mounting on an engine adjacent to an exhaust of the engine and a second end wall, the first end wall extending from the inner wall outwardly to the outer wall; a second end wall mounted on the second end of the outer wall, the second end wall extending across the second end of the outer wall; the inner wall extending from the first end wall toward the second end wall, the inner wall being spaced from the second end wall, the inner wall defining an inner heating chamber portion within the inner wall and an outer heating chamber portion between the inner wall and the outer wall; a medial wall extending from the second end wall toward the first end wall, the medial wall being positioned between the inner wall and the outer wall to define inner and outer portions of the outer heating chamber portion, the medial wall being spaced from the first end wall; a tube for introducing a smoke producing fluid into the heating chamber, the tube having a first portion extending through the outer heating chamber portion, the tube having a second portion coiled about the inner wall along at least a portion of a length of the inner wall, the tube having a distal portion extending into the an inner heating chamber portion, the distal portion of the tube having an open end positioned adjacent to the first end wall; wherein the outer wall having an outlet opening therein for permitting smoke produced in the heating chamber to exit the heating chamber.