Coated fibrous pipe insulation system

Details Coated fibrous pipe insulation system Coated fibrous pipe insulation system

2005-11-15

2005-11-15

Hook, James (Department: 3754)

Pipes and tubular conduits

Distinct layers

With intermediate insulation layer

C138S158000, C138S169000, C138S170000

Reexamination Certificate

active

06964282

ABSTRACT:
A pipe insulation system includes a tubular core of fibrous insulation and a flexible closed cell foam layer overlaying the core and forming an outer surface of the system. The tubular core has a first longitudinal slit extending completely through the wall of the core and a second longitudinal slit in the inner surface of the tubular core, opposite the first slit, that forms a hinge permitting the tubular core to be opened and closed to place the system about a pipe. Preferably, the foam layer has a water vapor permeance rating of 0.02 perms or less and the pipe insulation system includes a seal for sealing the first slit so that an outer surface layer of the sealed system formed by the foam layer and seal has a water vapor permeance rating of 0.02 perms or less.

REFERENCES:
patent: 1439653 (1922-12-01), Waldo
patent: 2872947 (1959-02-01), Isenberg
patent: 3475920 (1969-11-01), Jacobs
patent: 4205105 (1980-05-01), Blundell
patent: 4259981 (1981-04-01), Busse
patent: 4874648 (1989-10-01), Hill et al.
patent: 5762109 (1998-06-01), Matthews et al.
patent: 6016846 (2000-01-01), Knittel et al.
patent: 6403180 (2002-06-01), Barrall
patent: 6782922 (2004-08-01), Migliorini et al.

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