AXIAL-PISTON HYDRAULIC MACHINE Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: axis of the cylindrical pivot is perpendicular to the plane of inclination of the bearing disk. Two inclined ring grooves are made in sides of the piston in planes parallel to the bearing plane of the inclined disk. The fist groove is hydraulically connected with the under-piston space. The second groove is positioned in front of the first one from the side of the disk and is hydraulically connected with the housing. The point of intersection of the piston axis with the inclined axis is positioned at the middle of the space between the grooves along the axis of the piston. Both grooves are received in the cylindrical recess at any position of the piston with respect to the cylindrical block. The passage made in piston is shifted with respect to the piston axis in the direction of movement of the pivot. EFFECT: enhanced efficiency. 2 cl, 3 dwg