초록 ▼

The shroud is formed from sheet material and is cylindrical in shape. A plurality of spacers are associated with the sheet material. These spacers are designed to engage the outer surface of a duct to hold the cylindrical sheet material in radially outwardly spaced relationship to the duct, defining

The shroud is formed from sheet material and is cylindrical in shape. A plurality of spacers are associated with the sheet material. These spacers are designed to engage the outer surface of a duct to hold the cylindrical sheet material in radially outwardly spaced relationship to the duct, defining thereby an insulating air gap between the outer surface of the duct and the shroud. The angular space between the spacers serves as gas channels to permit gas to flow between the shroud and the outer surface of the duct, along the length of the duct. The shroud has a straight axially extending slot along its entire length for easy removal from a duct. An axially extending edge receiving pocket is formed on the shroud adjacent the slot for receiving the adjacent longitudinally extending edge of the slot to hold the shroud in a cylindrical shape and to provide a gas-tight closure for the slot.

대표청구항 ▼

An apparatus comprising a duct for use in aircraft, a shroud mounted on said duct, said shroud comprising an axially extending tube, the surface of said tube having at least one clamping band receiving groove formed therein, said groove having a radially inwardly spaced base, said base having a plur

An apparatus comprising a duct for use in aircraft, a shroud mounted on said duct, said shroud comprising an axially extending tube, the surface of said tube having at least one clamping band receiving groove formed therein, said groove having a radially inwardly spaced base, said base having a plurality of radially inwardly projecting angularly spaced arcuate projections defining spacers, a band formed from a heat resistant rubber-like material secured to the outer surface of the duct beneath said clamping band receiving groove, said spacers engaging the outer surface of said band for holding said shroud in a radially outwardly spaced relationship to said duct, defining thereby an insulating air gap between the duct and the shroud and isolating said shroud from aircraft vibration and heat in the duct, the portions of the base of the groove between said arcuate projections defining channels beneath said clamping band receiving groove for the passage of gases in the air gap between the outer surface of the duct and the inner surface of the shroud.