A temperature controlled insulated jacket construction 10 for encircling the top, bottom, and side of a refrigerant drum 100. The jacket construction 10 includes an inner panel member 40 that encircles the drum 100 in the horizontal orientation, an outer panel member 20 that encircles both the inner...http://www.google.es/patents/US5974820?utm_source=gb-gplus-sharePatente US5974820 - Refrigerant cylinder jacket construction