US 12,264,672 B2
Motor vehicle oil pump
Giuseppe Lo Biundo, Partinico (IT); and Carlo Pachetti, Cascina (IT)
Assigned to O.M.P. OFFICINE MAZZOCCO PAGNONI S.R.L., Funo di Argelato (IT)
Appl. No. 18/259,195
Filed by O.M.P. OFFICINE MAZZOCCO PAGNONI S.R.L., Funo di Argelato (IT)
PCT Filed Dec. 27, 2021, PCT No. PCT/IB2021/062324
§ 371(c)(1), (2) Date Jun. 23, 2023,
PCT Pub. No. WO2022/144745, PCT Pub. Date Jul. 7, 2022.
Claims priority of application No. 102020000032470 (IT), filed on Dec. 28, 2020.
Prior Publication US 2024/0052829 A1, Feb. 15, 2024
Int. Cl. F04C 2/08 (2006.01); F04C 2/10 (2006.01); F04C 15/00 (2006.01)
CPC F04C 2/103 (2013.01) [F04C 2/084 (2013.01); F04C 15/00 (2013.01); F04C 15/008 (2013.01); F04C 2240/51 (2013.01); F04C 2240/52 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A motor vehicle oil pump, comprising:
a pump body;
an external rotor having a radially internal surface forming a first plurality of lobes;
an internal rotor having a radially external surface forming a second plurality of lobes configured to engage the first plurality of lobes of the external rotor, wherein a number of lobes of the first plurality of lobes is equal to a number of lobes of the second plurality plus one;
a driving body rotatable with respect to the pump body about a first axis of rotation, wherein the external rotor is constrained to the driving body; and
an idle shaft rotatably connected to the pump body about a second axis of rotation parallel and eccentric to the first axis of rotation, wherein:
the external rotor is rotatable about said first axis of rotation and is configured to be rotated by the driving body;
the driving body is configured to be rotated by a motor;
said internal rotor is fitted onto said idle shaft for rotating about said second axis of rotation;
said internal rotor is configured to be rotated by the external rotor; and
said driving body comprises a base wall and a side wall extending axially away from the base wall for defining an internal cavity of the driving body, said external rotor being inserted into said internal cavity and being constrained to said side wall.