Multi-layer exhaust insulation systems and methods
AssigneeLincoln Industries, Inc.
InventorsJohn Michael Jarecki, Adam James Matzner
Life of this patent
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Abstract
Exhaust insulation systems and methods are described that include multiple layers. In one example, a system includes a base insulation layer covering a portion of an exhaust pipe and a hard outer cover formed from a spirally wrapped knit tape and having a length coextensive with the length of the underlying base insulation layer. The wrapped knit tape outer cover can include successive turns of tape overlapping by 25% to 75%. The knit tape can be impregnated with a thermosetting phenolic resin prior to being wrapped about the pipe.
Claims24
An exhaust insulation system for an exhaust pipe, comprising:
- a base insulation layer of an insulation disposed about a section of the exhaust pipe;
- an outer cover of knit tape spirally wrapped about the base insulation layer and the section of the exhaust pipe, wherein the knit tape outer cover is impregnated with a resin and wherein the knit tape outer cover has opposing ends longitudinally along a length of the section of exhaust pipe and the base insulation layer extends between the ends of the knit tape outer cover.
A method of insulating an exhaust pipe, comprising:
- covering a portion of the exhaust pipe with an insulation blanket to form an insulation layer having ends and defining a length between the ends;
- spirally wrapping a knit tape about the portion of the exhaust pipe and the length of the insulation layer, the knit tape impregnated with a thermoset resin and being in a semi-cured state while being wrapped;
- and
- heating the knit tape to cure the thermoset resin and form a hardened outer cover.
An exhaust insulation system for an exhaust pipe, comprising:
- a base insulation layer of an insulation blanket disposed about a section of the exhaust pipe;
- a hard outer cover of knit tape wrapped spirally about the base insulation layer and the section of the exhaust pipe, wherein the knit tape has a width of 2 to 4 inches and a thickness of 0.020 to 0.025 inches, wherein the hard outer cover includes:
- a cured phenolic thermoset resin;
- opposing ends and length between the ends coextensive with a length of the base insulation layer;
- and
- successive turns of the knit tape including a second turn which overlaps a first, adjacent turn by an overlap amount ranging from 25% to 75% of a width of the knit tape.
The exhaust insulation system of 22, wherein the knit tape compresses the base insulation layer.
Dependencies are inferred from the claim text.