Patent ID: 6386863
Filing Date: 2002-05-14
Classification: F23C,F23D

Abstract:
A compound spin vane assembly for imparting a spin to air flowing through an annular air flow passage having a longitudinal axis of symmetry, the passage being partially defined between an inner wall and an outer wall, comprising:an annular flow passage having an inner wall and an outer wall; a first vane portion having a leading edge exposed to the oncoming flow of air, a trailing edge located downstream thereof with respect to the flow of air as it passes by the first vane portion, the first vane portion also having an inner edge, an outer edge located proximate to the outer wall of the annular air passage, and opposite, lateral sides; a second vane portion having a leading edge exposed to the oncoming flow of air, a trailing edge downstream thereof with respect to the flow of air as it passes by the second vane portion, the second vane portion also having an inner edge located proximate to the inner wall of the annular air passage, an outer edge, and opposite, lateral sides; a third vane portion substantially identical in configuration to the second vane portion; and means for rigidly connecting at least one side of the first vane portion to both the opposite lateral side of the second vane portion and the opposite lateral side of the third vane portion, wherein the means for rigidly connecting is situated in spaced lateral relationship with respect to the first vane portion so that the first, second, and third vane portions move together as a unit with respect to the annular flow passage and wherein the means for rigidly connecting is positioned in the annular air flow passage.