Internal gear pump comprising: • a pinion capable of rotating about a first axis of rotation, • a ring arranged around the pinion, presenting a cylindrical perimeter and capable of rotating about a second axis of rotation different from the first axis of rotation and parallel to the latter, the pinion and the ring being arranged so as to delimit a workspace comprising a high-pressure space and a low-pressure space, • a first support element arranged on a first side of the ring to limit its movement in a first way according to a first direction essentially parallel to the first and second axes of rotation, • a second support element arranged on a second side of the ring to limit its movement in a second way opposite the first way and according to the first direction, • a cylindrical wall arranged around the ring to limit its movement in a plane, essentially perpendicular to the second axis of rotation, • a first, circular arched high-pressure recess and in fluidic contact with a first portion of the cylindrical perimeter of the ring, • a first, circular arched low-pressure recess and in fluidic contact with a second portion of the cylindrical perimeter of the ring, the first high-pressure recess and the first low-pressure recess being disjointed, • a first high-pressure conveyance means forming a fluidic connection between the high-pressure space and the first high-pressure recess, and • a first low-pressure conveyance means forming a fluidic connection between the low-pressure space and the first low-pressure recess, characterised in that • the first high-pressure recess is symmetrical with respect to a second plane passing via the second axis of rotation and perpendicular to a first plane passing via the first and second axes of rotation, and in that • the first low-pressure recess is symmetrical with respect to said second plane. • a pinion capable of rotating about a first axis of rotation, • a ring arranged around the pinion, presenting a cylindrical perimeter and capable of rotating about a second axis of rotation different from the first axis of rotation and parallel to the latter, the pinion and the ring being arranged so as to delimit a workspace comprising a high-pressure space and a low-pressure space, • a first support element arranged on a first side of the ring to limit its movement in a first way according to a first direction essentially parallel to the first and second axes of rotation, • a second support element arranged on a second side of the ring to limit its movement in a second way opposite the first way and according to the first direction, • a cylindrical wall arranged around the ring to limit its movement in a plane, essentially perpendicular to the second axis of rotation, • a first, circular arched high-pressure recess and in fluidic contact with a first portion of the cylindrical perimeter of the ring, • a first, circular arched low-pressure recess and in fluidic contact with a second portion of the cylindrical perimeter of the ring, the first high-pressure recess and the first low-pressure recess being disjointed, • a first high-pressure conveyance means forming a fluidic connection between the high-pressure space and the first high-pressure recess, and • a first low-pressure conveyance means forming a fluidic connection between the low-pressure space and the first low-pressure recess, • the first high-pressure recess is symmetrical with respect to a second plane passing via the second axis of rotation and perpendicular to a first plane passing via the first and second axes of rotation, and in that • the first low-pressure recess is symmetrical with respect to said second plane.