Apparatus for reinforcing a duct
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United States of America Patent
Stats
-
Dec 9, 1980
Grant Date -
N/A
app pub date -
Jan 5, 1979
filing date -
Jan 5, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A duct reinforcement and a method for building the reinforcement including a special tool for use in a preferred method are disclosed. The duct reinforcement includes a support washer on each of two opposing sides of the duct to be supported and a stiff wire extending through the sides of the ducts and both washers. The portion of the wire protruding beyond each support washer on the outside of the duct forms a hook with a tip of the wire substantially opposed to the outer face of the respective support washer. A preferred form of the support washer forms a volcano-shaped contour surrounding the washer hole on the outer face so that the tip of the wire makes contact with the washer inside the crest of the volcano-shaped contour. A preferred arrangement includes a rubbery seal between each support washer and the respective side of the duct to prevent leakage from the duct.
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