F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
189/49
F16L 7/00 (2006.01) F16L 59/04 (2006.01) F16L 59/16 (2006.01)
Patent
CA 1283869
ABSTRACT OF THE DISCLOSURE A unitary removable and reuseable jacket for the thermal insulation of pipe accouterments is disclosed. The fully-formed generally-rectangular jacket is composed of three layers: a heat and water resistant outer fabric layer, a hardened rigid-cell polyurethane middle layer, and a thin flexible heat-shrinkable plastic inner layer. The inner and outer layers are joined together by perimeter seams and a transverse center seam which form two pockets adapted to contain the polyurethane foam middle layer. Said inner and outer layers are formed at time of manufacture while the middle layer is formed during the application process. During the application process, an exothermic chemical reaction is generated by the combination of the chemicals polyol and isocyanate which are inserted between the inner and outer layers through holes contained in the outer layer, to form a rapidly expanding and hardening rigid cell polyurethane foam middle layer. During the application of the jacket around the accouterment, in response to the exothermic chemical reaction, the inner layer shrinks to fit the exact shape of the underlying pipe, as does the rigid-cell middle layer which is being formed. When installation is complete, the jacket may be removed and reused by using pressure to "crack" the transverse seam dividing the middle layer into two pockets which are positioned on opposite sides of the accouterment.
545449
Field Foam Incorporated
Ridout & Maybee Llp
LandOfFree
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