A thermostatic coolant circulating device includes a supply circuit for circulating a coolant to a load and a cooling circuit for cooling the coolant from a temperature to which the coolant was raised by cooling the load. The supply circuit includes a tank for storing the coolant, a pump for circulating...http://www.google.se/patents/US6397943?utm_source=gb-gplus-sharePatent US6397943 - Thermostatic coolant circulating device
