Patent ID: 8656853

Claim:
A dome assembly comprising: an upper hemispherical window having a first end surface, an upper ring assembly being sealingly connected to the upper hemispherical window at or near the first end surface; a lower hemispherical window having an outer surface, and a second end surface, a lower ring assembly being sealingly connected to the lower hemispherical window at or near the second end surface; one or more spider retainer assemblies comprising: a spider ring assembly including a thrust ring positioned adjacent the outer surface of the lower hemisphere window at an end opposite the seconde end surface; one or more saddle arms having a first end and a second end, each saddle arm being fixedly attached to the spider ring assembly at its first end and fixedly attached to the lower ring assembly at its second end, the one or more saddle arms retaining the spider ring assembly and the lower ring assembly in substantially fixed relation to one another.