Manifold for a hydraulic vibration generating device or hydraulic motor

A method of operation of a hydraulic motor, the method comprising:

• providing a manifold comprising a fluid inlet orifice, a fluid outlet orifice, an inner volume defined by a cylindrical surface with a diameter, and a pressure chamber within the inner volume, the pressure chamber comprising:
• a protrusion extending from the cylindrical surface with the fluid inlet orifice extends through the protrusion into the inner volume;
• a pressure channel formed in the protrusion, the pressure channel overlapping the fluid inlet orifice and extends along a length of the protrusion below the fluid inlet orifice;
• and
• a seal portion formed above the fluid inlet orifice and on either side of the pressure channel, wherein the inner volume receives the power generating member within the inner volume locating the grooved drive adjacent the pressure channel such that flow of hydraulic oil is inhibited between the power generating member and the seal portion and directed through the pressure channel while engaging the grooved drive;
• providing a power generating member within the inner volume of the manifold, the power generating member is a shaft having a diameter that is smaller than the diameter of the cylindrical surface of the manifold forming a gap between the cylindrical surface and the power generating member, wherein the power generating member further comprises:
• a grooved drive comprising a plurality of recessed grooves formed in an outer surface of the power generating member, wherein the recessed grooves of the plurality of recessed grooves are evenly spaced around the circumference of the power generating member;
• flowing hydraulic oil into the manifold through the fluid inlet orifice and into the pressure chamber;
• directing the hydraulic oil through the pressure chamber to engage the power generating member to rotate the power generating member to generate power;
• and
• flowing hydraulic oil from the pressure chamber and out of the manifold through the fluid outlet orifice.