Stator of a gerotor device and a method for manufacturing roller pockets in a stator of a gerotor device

A stator for gerotor device comprising:

• a plurality of rollers;
• a stator body having a forward face, a rear face, a cavity including a generally cylindrical section defining a central axis and a plurality of roller pockets angularly spaced around a periphery of the cylindrical section,
• wherein each roller pocket receives a respective roller, which acts as an internal tooth of the stator,
• wherein each roller pocket includes a generally cylindrical roller pocket bearing surface, against which the respective roller received in the roller pocket bears,
• wherein each bearing surface extends along an arc that partially surrounds the respective roller received in the roller pocket,
• wherein the arc is greater than 185 degrees,
• wherein each bearing surface includes a first section following a first curve and a second section following a second curve, wherein each curve is substantially circular, wherein the first curve is a substantial mirror image of the second curve with respect to a center line through the respective roller pocket and the respective bearing surface deviates from each curve at or adjacent an area of the respective bearing surface intersected by the center line,
• wherein the first curve follows a first radius and the second curve follows a second radius, which is equal in magnitude to the first radius,
• wherein the first radius emanates from a first point located on the same side of the center line of the roller pocket and closer to the first section of the bearing surface as compared to a rotational axis of the roller when the gerotor device is in an unpressurized state.