Duct reinforcement

Details Duct reinforcement Duct reinforcement

1992-01-10

1993-10-19

Nicholson, Eric K.

Pipe joints or couplings

Materials

Sheet

411918, 411437, 285405, 138172, 138DIG4, F16L 904

Patent

active

052539016

ABSTRACT:
A reinforced duct includes a duct section having a peripheral skin of sheet metal, a plurality of lengths of metal straps, each strap being configured to have a cross section including a V-shape portion and inwardly turned edges spaced from the apex of the V to form a gap between the edges. The straps circumscribe the duct with the apices of the V-shapes away from the peripheral skin. A plurality of screws driven outwardly through the peripheral skin into the gaps in the circumscribing straps and engage the inwardly turned edges to bind the skin to the straps so that the straps reinforce the skin to prevent excessive flexure of the skin.

REFERENCES:
patent: 1779346 (1930-10-01), Trachte
patent: 1793127 (1931-02-01), Osius
patent: 1826133 (1931-10-01), Hatch
patent: 2334046 (1943-11-01), Tinnerman
patent: 3202184 (1965-08-01), Godshalk
patent: 3387809 (1968-06-01), Zwerling
patent: 3630549 (1971-12-01), Grimm
patent: 4461499 (1984-07-01), Hunter
patent: 4621661 (1986-11-01), Greiner
patent: 5103872 (1992-04-01), Jyh-Long

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