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A hermetic pump includes a housing having a bore, an inlet, and an outlet for channeling a fluid therethrough. A shaft is disposed coaxially in the bore, and includes a journal and an impeller spaced apart therefrom. The shaft is hermetically rotated to pump the fluid through the bore from the impel

A hermetic pump includes a housing having a bore, an inlet, and an outlet for channeling a fluid therethrough. A shaft is disposed coaxially in the bore, and includes a journal and an impeller spaced apart therefrom. The shaft is hermetically rotated to pump the fluid through the bore from the impeller and around the journal for developing a hydrodynamic journal bearing. In one embodiment, the pump may be used in a closed loop cooling circuit.

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[Accordingly, what is desired to be secured by Letters Patent of the United States is the invention as defined and differentiated in the following claims in which we claim:] [1.]a housing having a bore, an inlet joined to said bore for receiving a liquid fluid, and an outlet joined to said bore for

[Accordingly, what is desired to be secured by Letters Patent of the United States is the invention as defined and differentiated in the following claims in which we claim:] [1.]a housing having a bore, an inlet joined to said bore for receiving a liquid fluid, and an outlet joined to said bore for discharging said fluid;a shaft disposed coaxially in said bore and spaced therein to define a gap therearound, and said shaft has integral portions including a journal, an impeller, and a rotor spaced coaxially apart from each other and hermetically sealed in said housing; andmeans for rotating said rotor to drive said shaft and impeller to pump said fluid through said gap from said inlet to said outlet, and around said journal thereby developing a hydrodynamic journal bearing in said gap around said journal, and said journal bearing being disposed in parallel flow with said housing outlet for receiving a minor portion of said pressurized fluid from said impeller, with a majority portion of said pressurized fluid from said impeller being discharged from said housing outlet.