Flue control device

Details Flue control device Flue control device

1989-07-18

1990-09-04

Kamen, Noah P.

Stoves and furnaces

Stovepipes

126297, 1221552, 138 46, F23J 1100

Patent

active

049535358

ABSTRACT:
A device for adjustably restricting the flow of exhaust gases in a furnace flue to conserve fuel is disclosed. It comprises two interlocking pipe sections and a helical element having one end fixed to the inner surface of each pipe section. The helical element has a circular opening along its central axis. The degree of restriction provided by the device is adjusted by twisting or separating the two pipe sections.

REFERENCES:
patent: 293893 (1884-02-01), Lindley et al.
patent: 2020194 (1935-11-01), Kuhlmann
patent: 3052230 (1962-09-01), Conrad

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