Patent ID: 8875735

Claim:
A coolant reservoir assembly comprising: a coolant reservoir for storing a cooling fluid and including a gas region therein, said coolant reservoir including a fill port in fluid communication with the inside of the coolant reservoir; and a multi-functional unit mounted to the coolant reservoir and covering the fill port, said unit including a vent line and a fill line, said unit further including a first vent valve in fluid communication with the fill port and the vent line, said first vent valve automatically venting the gas region if the pressure of the gas region exceeds a first predetermined pressure, said unit further including a second vent valve in fluid communication with the vent line and the fill port, said second vent valve automatically venting the gas region if the pressure in the gas region exceeds a second predetermined pressure, said unit further including a check valve in fluid communication with the vent line and the fill port, said check valve allowing air to enter the coolant reservoir if the pressure within the gas region is below ambient pressure, said unit further including a fill valve, said fill valve selectively connecting the fill line to the fill port after the gas region is vented, said unit further including an integrated body containing the vent line, the fill line, the first vent valve, the second vent valve, the check valve, the fill valve, and a plurality of fluid passageways.