Patent ID: 7043968

Claim:
An article of manufacture comprising a directly refrigerated component or system in which a refrigerating pathway is provided with passive cooling moderation in a block made of a thermally conducting material, wherein the directly refrigerated component or system has the refrigerating pathway such that a refrigerant can course and cool primarily by evaporation from a liquid to a gaseous state within the passageway, and thermal conduction to include through a solid wall; and said article is a test device for rotational viscometric testing of an oleaginous fluid, with a passive cooling moderator having a moderating live space and at least two cascade points, which includes in said block: a plurality of vertically oriented wells into each of which can be placed a sample sleeve: a plurality of sample sleeves, each of which is placed into one of said wells, and each of which can receive the oleaginous fluid and a rotor; a heater; a temperature-sensing probe; and a refrigerant pathway, in which is positioned the passive cooling moderator; wherein said block has a shape of a rectangularly shaped box; the heater embraces a plurality of heaters inserted into said block horizontally; the temperature-sensing probe embraces at least one such probe that is inserted into said block vertically; and the refrigerant pathway embraces a plurality of refrigerant pathways, in each of which is positioned the passive cooling moderator.