Flue restrictor
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United States of America Patent
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-
Apr 28, 1981
Grant Date -
N/A
app pub date -
Sep 1, 1978
filing date -
Sep 1, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A flue restrictor for installation in the flue piping of a heating system to reduce its effective cross sectional area comprises sheet metal inlet and outlet sections having flanges secured together in a joint that has a guideway in it for a sheet metal gate valve that may be transversely positioned to produce the desired cross-sectional area and riveted in place to provide a substantially tamper-proof assembly.
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