B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
B22D 41/18 (2006.01)
Patent
CA 2604791
A stopper rod comprises a body (11) having a central passageway (12) with part of a carrier rod (13) fixed in the passageway and a further part outside of the passageway for attachment to a lifting device. An enlarged part of the passageway defines a sealing surface (14) and an insert (16) around the carrier rod is partly received in the enlarged part. Retention means (17, 18) are carried on the carrier rod and expandable means are disposed around the carrier rod between the insert (16) and the retention means (17, 18). The expandable means include an expandable graphitic composition formed by removing a proportion of interstitial water from an expandable graphite formulation. The insert has a co-efficient of thermal expansion no greater than that of the carrier rod, whilst expansion of the expandable means is greater than that of the carrier rod.
L'invention concerne une quenouille comprenant un corps (11) doté d'un passage central (12) dans lequel une partie de tige de support (13) est fixée, une partie extérieure du passage étant destinée à être fixée à un dispositif de levage. Une partie élargie du passage définit une surface d'étanchéité (14) et reçoit partiellement un insert (16) placé autour de la tige de support. Un organe de retenue (17, 18) est supporté par la tige de support et un organe extensible est disposé autour de ladite tige de support entre l'insert (16) et l'organe de retenue (17, 18). L'organe extensible comprend une composition graphitique extensible formée par élimination d'une quantité d'eau interstitielle de la formulation de graphite extensible. L'insert possède un coefficient d'expansion thermique égal ou inférieur à celui de la tige de support, l'expansion de l'organe extensible étant supérieure à celle de la tige de support.
Foseco International Limited
Gowling Lafleur Henderson Llp
Refractory Intellectual Property Gmbh & Co. Kg
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