Flue restrictor

Details Flue restrictor Flue restrictor

1986-04-09

1989-02-14

Joyce, Harold

Furnaces

Draft regulators

Damper

126285A, 126292, 13762531, 138 45, 138 46, F23L 1304

Patent

active

048039314

ABSTRACT:
A flue restrictor to control air flow in a combustion apparatus having an exhaust system that includes a flue. The restrictor has a housing to be attached in the flue. There is a first valve member located in the housing and a second valve member located in the housing. Each valve member is composed of open and closed areas, and cooperates with the other valve member to act as a valve. Movement of one valve member relative to the other controls air flow in the restrictor, and thus in the combustion apparatus. The restrictor provides sensitive control and ease of adjustment in position.

REFERENCES:
patent: 292349 (1884-01-01), Payne
patent: 607669 (1898-07-01), Underwood
patent: 3580238 (1971-05-01), Diehl

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