Water pump device

Abstract

A water pump device includes a water pump shell, a bearing shaft, an impeller, a belt pulley, a water seal. The water pump shell has an overflow hole and a flow-retarding channel that is fluidly connected to a downstream end of the overflow hole and that reduces flow rate of water flowing out of the overflow hole. The bearing shaft is rotatably mounted on and extending through the water pump shell. The impeller is mounted to an end portion of the bearing shaft. The belt pulley is mounted on another end portion of the bearing shaft that is opposite to the impeller. The water seal is mounted on the bearing shaft and located between the overflow hole and the impeller.

Dependencies are inferred from the claim text.