A safety radiator cap for radiator providing a safety plate or wire made of shape memory alloy. The safety plate or wire bends downward under ambient temperature. High temperature water in the radiator causes the safety plate to extend out due to the memory characteristic of the alloy, and the safety...http://www.google.es/patents/US5042677?utm_source=gb-gplus-sharePatente US5042677 - Safety radiator cap
