Abstract: The machine includes at least one set of two cooperating pinions rotating between two mobile bearing flanges which are mobile in translation in cavities provided in a median casing closed on the two opposite sides thereof by anterior and posterior covers. Each of these two bearing flanges is substantially pressure equilibrated by a suitable sealing system arranged between this bearing flange and the adjacent cover. The bearing flanges supporting the pinions are floatingly mounted inside the median casing, and pressure means are provided to press the bearing flanges against the median casing and cause a differential pressure pressing the bearing flanges against side faces of the pinions.

Abstract: An apparatus for an hydrostatic compensation of hydraulic pumps and motors of gear type in which two intermeshing gears are mounted on shafts which are supported by bearings or journal-bearings which can slide within the cavity of a pump or a motor housing closed on both lateral sides by covers. Compensation chambers between the bearings and the covers are delimited by grooves respectively provided in the faces facing bearings and covers. A part of one side of the grooves provided in the bearings is in alignment with one of the grooves provided in the corresponding cover. Deformable tightness seals are arranged in said grooves.

Abstract: An electro-hydraulic unit for control devices, particularly for steering devices, braking devices, suspension devices, and like devices comprises an electric motor directly connected to a gear hydraulic pump, said electric motor and hydraulic gear pump having a common interface providing a lateral cheek for the electric motor, this common interface being formed in one part with body of the hydraulic pump.