Patent ID: 7223920
Filing Date: 2007-05-29
Classification: F16B,H02K

Abstract:
1. An insulating boot for ends of through-bolts in electric generators comprising: a shaped insulating boot with an inner surface and an outer surface and an opening; wherein said boot is formed from a cloth impregnated with a rubberized material and wherein an additional layer of insulation is added to at least some portion of the inner surface; wherein said cloth is comprised of long molecular poly-paraphenylene terephthalamide chains and wherein said rubberized material is a silicone rubber; wherein the inner surface of said shaped boot is within 0.01 to 0.5 inches (0.025–1.3 cm) larger than the shape of the end, of a through-bolt to which said shaped boot will be applied, and wherein said inner surface is substantially free of protrusions; wherein said shaped insulating boot has a breakdown voltage of at least 10 kV; wherein said shaped boot may be compressed and wherein said boot maintains an original memory shape after being compressed; wherein an O-shaped ring is located around the opening of said boot, and loops are integrally formed in the outer surface; wherein said shaped boot is placed over the end of a through-bolt of an electric generator.