US 12,281,650 B2
Oil pump not requiring changing positions of suction port and discharge port according to forward rotation and reverse rotation
Do Jae Joo, Pohang-si (KR); Seong Wook Cha, Gyeongju-si (KR); Gahyeon Yi, Daegu (KR); and Hui Do Ryu, Gyeongju-si (KR)
Assigned to YOUNGSHIN PRECISION CO., LTD, Gyeongju-si (KR)
Appl. No. 18/682,833
Filed by YOUNGSHIN PRECISION CO., LTD, Gyeongju-si (KR)
PCT Filed Aug. 5, 2022, PCT No. PCT/KR2022/011704
§ 371(c)(1), (2) Date Feb. 9, 2024,
PCT Pub. No. WO2023/018124, PCT Pub. Date Feb. 16, 2023.
Claims priority of application No. 10-2021-0105108 (KR), filed on Aug. 10, 2021.
Prior Publication US 2024/0352933 A1, Oct. 24, 2024
Int. Cl. F04C 2/10 (2006.01); F04C 15/00 (2006.01)
CPC F04C 15/0065 (2013.01) [F04C 2/10 (2013.01); F04C 2210/206 (2013.01); F04C 2240/30 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An oil pump comprising:
a pump module provided with a rotary shaft, an inner rotor coupling with the rotary shaft, an outer rotor rotated engaging with the inner rotor, an inlet for sucking fluid, and an outlet for pressing and discharging the sucked fluid;
housings supporting the pump module; and
a direction switching unit coupled between the housings and the outer rotor to keep an eccentric distance between the rotary shaft or a central axis line of the inner rotor and a central axis line of the outer rotor, wherein
the pump module comprises a suction area where oil is sucked, and a discharge area where the oil sucked in the suction area is pressurized and discharged,
the oil pump further comprises a power transmission unit comprising a gear to rotate the rotary shaft,
the discharge area comprises a mist hole branched from and passing through the discharge area to spray high-pressure oil to an area where the power transmission unit is engaged.