Pump having a passage extending between a cam plate oil reservoir and a bearing oil reservoir

An axial cam piston pump comprising:

• a cam plate;
• an input shaft for rotationally driving the cam plate;
• a pump housing at least partially surrounding the cam plate and defining a cam plate oil reservoir around at least a portion of the cam plate;
• a bearing support at least partially disposed within the cam plate oil reservoir, the bearing support defining a bearing oil reservoir at least partially surrounding a portion of the input shaft;
• and
• at least one passage extending between the bearing oil reservoir and the cam plate oil reservoir, the extent of the passage being at a non-radial angle relative to a longitudinal axis of the input shaft, the non-radial angle being swept in a direction of rotation of the input shaft, the at least one passage configured such that a dynamic motion imparted on oil within the cam plate oil reservoir facilitates migration of oil from the cam plate oil reservoir through a bearing at least partially supported by the bearing support into the bearing oil reservoir and through the at least one passage into the cam plate oil reservoir, wherein the dynamic motion imparted on the oil includes a rotational motion of the oil within the cam plate oil reservoir that creates a region of reduced pressure adjacent an opening of the at least one passage.