Heat-activated flue damper actuator

Details Heat-activated flue damper actuator Heat-activated flue damper actuator

1994-09-14

1995-09-05

Dority, Carroll B.

Liquid heaters and vaporizers

Stand boiler

Fluid fuel burner

431 20, 122 131, 126361, F22B 500

Patent

active

054471257

ABSTRACT:
A heat activated flue damper actuator employing an assembly of shape memory alloy springs with linkages to a conventionally designed contemporary flue damper. The combination of the spring material, spring configuration and dimensions, linkage/fastening scheme to the flue damper shaft and placement in the water heater's heating chamber are all controlled to optimize the energy efficiency of a conventionally designed, pilot-lit or pilotless ignition, contemporary gas water heater.

REFERENCES:
patent: 2508885 (1950-05-01), Mackay
patent: 4205293 (1980-05-01), Melton et al.
patent: 4896955 (1990-01-01), Zider et al.
patent: 5067957 (1991-11-01), Jervis
patent: 5393221 (1995-02-01), McNally

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