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US 5,666,942 AGranted
Flue insert to control exhaust gases
OwnerGaius D. Kazeninventor
Life of this patent
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Abstract
A flue insert which includes a helical vane having an open center axial area and means for mounting the helical vane within a furnace flue stack. The helical vane rotates counterclockwise, i.e. it rotates in a counterclockwise direction from the furnace/boiler end to the atmospheric end of the flue. The helical vane rotates for approximately 540.degree., and has a width which is equal to approximately one-third of the diameter of the flue.
Claims6
Apparatus for control of the flow of exhaust gases through a furnace flue system, comprising:
- a helical vane having a substantial open center axial area, the helical vane extending for at least 360.degree., wherein the width of the vane is approximately one-third the diameter of the flue, and wherein the vane rotates counterclockwise from a furnace end of an exhaust flue towards an atmospheric end thereof;
- and
- means mounting the helical vane within the flue, wherein the counterclockwise rotation of the vane opposes the natural helical flow of the exhaust gases, resulting in a reduced air flow through the flue.
Dependencies are inferred from the claim text.