Patent ID: 8382456

Claim:
A computer cooling system comprising: a heat exchanger and a pump circuit configured to provide a liquid coolant to the heat exchanger, the pump circuit including: a pump including a housing defining therein an inner chamber having a fixed volume, the inner chamber including at least an impeller chamber and a reservoir, the impeller chamber and the reservoir being positioned directly adjacent to each other in the pump housing, separated from each other by a wall and in fluid communication with each other through a port in the wall; an inlet through the housing opening to the reservoir, apart from the port; an outlet through the housing opening from the impeller chamber, apart from the port; a pumping mechanism in the impeller chamber; a resiliently compressible member in the reservoir accommodating a portion of the fixed volume of the inner chamber, wherein the resiliently compressible member is compressible in response to expansion of the liquid coolant; a retainer positioned in the inner chamber and configured to hold the resiliently compressible member in a position away from moving out of the inner chamber or into a position blocking fluid flow through the pump, wherein the retainer and the wall separating the impeller chamber and the reservoir are integrally formed to define a unitary construction; a separable cap, apart from the resiliently compressible member, defining a recessed inner wall in fluid communication with the reservoir; a pump discharge tubing extending between the pump outlet and the heat exchanger; and a pump return tubing extending between the heat exchanger and the pump inlet, the pump circuit providing the liquid coolant to the heat exchanger in a closed loop driven by the pumping mechanism including a flow path through the pump inlet into the reservoir, past the resiliently compressible member and out the port into the impeller chamber.