Patent ID: 7717688

Claim:
An oil pump for a compressor, comprising: a pump body; a drive shaft rotatably coupled to the pump body, wherein the drive shaft has a passage formed in an inner portion thereof and an inflow hole formed on the drive shaft; a plurality of pumping members provided with the pump body and configured to rotate with the drive shaft, the plurality of pumping members comprising: a first pumping member configured to receive fluid from an upper end of the pump body and to discharge the fluid to the drive shaft; and a second pumping member configured to receive fluid from a lower end of the pump body and to discharge the fluid to the drive shaft, wherein the fluid pumped by the first pumping member is provided to an inner part of the passage formed in the drive shaft, and the fluid pumped by the second pumping member is provided to the inner part of the passage formed in the drive shaft; and an upper cover configured to cover the first pumping member and a lower cover configured to cover the second pumping member, wherein the upper cover has at least one passage formed therein configured to receive fluid from a respective inner part of the compressor and to direct the received fluid to the first pumping member, and the upper cover further has a discharge groove configured to discharge fluid from the first pumping member to the passage formed in the drive shaft, wherein the fluid discharged to the discharge groove of the upper cover flows into the inflow hole of the drive shaft when the inflow hole of the drive shaft is aligned with the discharge groove of the upper cover, and the lower cover has at least one passage formed therein configured to receive fluid from a respective inner part of the compressor and to direct the received fluid to the second pumping member, and the lower cover further has a discharge groove configured to discharge fluid from the second pumping member to the passage formed in the drive shaft.