| 摘要 |
A thermal shield (20) having a first plate (22) and a second plate (24) with an interior chamber (26) positioned in between. The thermal shield includes a seam (40) extending around the periphery thereof which prevents the ingress of fluid into the interior chamber. The seam includes portions (60 and 72) that extend at least partially, and preferably completely, around the outer surface (56) of a shoulder (54) of the seam. In this regard, seam 40 is capable of sealing a pressure differential between the interior chamber and the regions surrounding the thermal shield of up to about 40 psi.
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