A spool-shaped metallic heat barrier is inserted between the motor housing and the pump housing of a motor-pump assembly which conveys fluids at elevated temperatures. The flanges of the heat barrier abut against and are connected to the respective housings by means of bolts, and are rigidly secured...http://www.google.com.au/patents/US4239462?utm_source=gb-gplus-sharePatent US4239462 - Heat barrier for motor-pump aggregates
