Patent ID: 8137084
Filing Date: 2012-03-20
Classification: F04C,F05C

Abstract:
1. A hydraulic machine comprising a body, flange, gears, sealing means acting as a body seal and a lobe seal adapted to effectively seal pressurized oil pockets within said hydraulic machine with a back-up ring that prevents squeezing of said lobe seal and to retain said lobe seal in an original position, and appropriately dimensioned bush bearings adapted to act as load bearing journals, a plurality of bean-shaped dowels located at both inlet and outlet sides acting as an interlocking device holding the body and flange together with minimum relative displacement to ensure high volumetric efficiency of said hydraulic machine even at a high operating pressures of 275 bar or higher, said bean-shaped dowels have a curvature with a curvilinear major axis of each of the bean-shaped dowels being aligned at a right angle with respect to a resultant force direction and a minor axis at an axis of symmetricity being aligned with the resultant force direction, the resultant force direction extending through a center of one of the gears.