Insulated heating and/or sanitation pipe

Details Insulated heating and/or sanitation pipe Insulated heating and/or sanitation pipe

2006-02-28

2006-02-28

Hook, James (Department: 3754)

Pipes and tubular conduits

Distinct layers

With intermediate insulation layer

C138S121000, C138S138000

Reexamination Certificate

active

07004203

ABSTRACT:
The heating and/or sanitation pipe comprises an inner pipe (12) made of a plastic material and a metal corrugated pipe (14) surrounding the inner pipe (12) at a radial distance {circle around (R)}). Further, the heating and/or sanitation pipe is provided with a compressible and/or expanded material (16) between the inner pipe (12) and the corrugated pipe (14) for fixing the inner pipe (12) inside the corrugated pipe (14). The compressible and/or expanded material (16) is adapted to be detached from the inner pipe for the purpose of exposing a connecting end of the inner pipe (12). Further, the heating and/or sanitation pipe comprises an insulation layer (18) surrounding the metal corrugated pipe (14) and an outer covering (20) around the insulation layer (18).

REFERENCES:
patent: 2330966 (1943-10-01), Mcleish et al.
patent: 3473575 (1969-10-01), Vogelsang et al.
patent: 3540448 (1970-11-01), Voorhees
patent: 3698440 (1972-10-01), Matthieu et al.
patent: 3717718 (1973-02-01), Schmidtchen
patent: 3812886 (1974-05-01), Hallwood
patent: 3814659 (1974-06-01), Nadeau
patent: 3867244 (1975-02-01), Adams
patent: 3952777 (1976-04-01), Uhlig
patent: 4303105 (1981-12-01), Rohner
patent: 4445543 (1984-05-01), Mead
patent: 4688603 (1987-08-01), Donnerhack et al.

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