Insulated exhaust pipe and manufacture thereof

Details Insulated exhaust pipe and manufacture thereof Insulated exhaust pipe and manufacture thereof

1989-07-31

1991-04-02

Cuchlinski, Jr., William A.

Pipes and tubular conduits

Distinct layers

With intermediate insulation layer

138147, 138122, 60322, 60282, F16L 914, F01N 300

Patent

active

050040189

ABSTRACT:
An insulated exhaust pipe comprising inner and outer spaced corrugated metallic tubes separated by refractory fiber isulation. Strips of higher density refractory fiber insulation hold the low density insulation in place during operation and prevent degradation of the fiber by vibration. The pipe is made by rolling the inner tube over a layer of insulation, including strips, to which adhesive has been applied. The insulated tube is then inserted into the outer tube, rotating the insulated tube so that the corrugations of the outer tube do not damage the insulation. Specific structure for carrying out these method steps is disclosed.

REFERENCES:
patent: 1513723 (1924-10-01), Bohlander
patent: 1710577 (1929-04-01), Hahn
patent: 1969374 (1934-08-01), Kleffel
patent: 3864909 (1975-02-01), Kern
patent: 3937590 (1976-02-01), Mani
patent: 4251590 (1981-02-01), Rubright et al.
patent: 4307756 (1981-12-01), Voigt et al.
patent: 4345430 (1982-08-01), Pallo et al.
patent: 4351365 (1982-09-01), Bauermeister et al.
patent: 4867269 (1989-09-01), Lalikos

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