Patent ID: 6826355
Filing Date: 2004-11-30
Classification: A63H

Abstract:
A smoke generator comprising:a) a supply tank that holds a liquid, b) a source of variable fluid pressure in sealed fluid communication with the supply tank for increasing and decreasing fluid pressure in the tank to feed the liquid to and from a heating unit; c) a first tube with a first end entering into the supply tank, and a second smoke outlet end; d) a heater positioned at least partially within the first tube for vaporizing the pressurized liquid driven by an increase in the pressure into a narrow annular region between the heating element and the surrounding tube; and e. a spacer that maintains a generally uniform circumferential spacing between said heater and said first tube along the length of said heater, wherein said spacer is disposed in said narrow annular region and is constructed to allow a flow of said liquid and its vapor through said spacer and said narrow annular region and to increase the flow path length of said liquid and its vapor as it is driven from said tube to said narrow annular region.