F - Mech Eng,Light,Heat,Weapons – 24 – H
Patent
F - Mech Eng,Light,Heat,Weapons
24
H
F24H 9/12 (2006.01) B29C 44/12 (2006.01) F24H 1/18 (2006.01)
Patent
CA 2100810
The storage tank portion of a water heater has an outwardly projecting threaded pipe coupling fitting and is disposed within a jacket structure that forms an enclosed insulation space around the storage tank, the outer end of the pipe coupling fitting being spaced inwardly apart from a pipe connection opening in the jacket structure. A generally tubular foam stop member having a convexly curved side portion is positioned within the insulation space before the space is filled by an injection process with a liquid foam insulation material. The foam stop member receives the pipe coupling, is axially pressed between the storage tank and the jacket structure, and forms a seal around the pipe coupling fitting and around the jacket structure pipe connection opening. During injection of the liquid foam insulation material into the enclosed insulation space, the foam stop member serves as a relatively small barrier that essentially precludes the liquid foam from escaping outwardly through the jacket structure pipe connection opening or entering the pipe coupling.
Le réservoir de stockage d'un chauffe-eau comprend un raccord de tuyau fileté se prolongeant vers l'extérieur; il est placé à l'intérieur d'une enveloppe qui forme un espace fermé créé pour recevoir le matériau isolant autour du réservoir. L'extrémité extérieure du raccord de tuyau se trouve espacé de l'ouverture du raccord de tuyau à l'intérieur de l'enveloppe. Un élément de retenue de la mousse isolante, de forme généralement tubulaire, est placé dans l'espace réservé pour le matériau isolant avant que cet espace ne soit rempli par injection d'un matériau d'isolation constitué de mousse liquide. L'élément de retenue, qui reçoit le raccord de tuyau, se trouve pressé axialement entre le réservoir de stockage et l'enveloppe et forme un joint d'étanchéité autour du raccord de tuyau et autour de l'ouverture du raccord de tuyau à l'intérieur de l'enveloppe. Au cours de l'injection de la mousse isolante liquide dans l'espace fermé, l'élément de retenue de la mousse fait office de barrière relativement petite qui empêche essentiellement la mousse liquide de déborder vers l'extérieur par l'ouverture du raccord de tuyau se trouvant dans l'enveloppe ou qui empêche la mousse de pénétrer dans le raccord.
Hanning David M.
Stretch Gordon W.
Blake Cassels & Graydon Llp
Rheem Manufacturing Company
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