Abstract: This invention relates to an assembly of a hydraulic motor and a combined device for immobilization, comprising: a reaction cam; a cylinder-block mounted to rotate with respect to the reaction cam; a first immobilization member fast with the cylinder-block; a second immobilization member fast with the reaction cam and capable of being disposed in a first position, in which the first and second immobilization means are fast with one another, and a second position, in which these first and second immobilization members do not cooperate for their mutual immobilization. The device for adjusting the relative position of the first and second immobilization members comprising a jack comprising a chamber.

Abstract: The present invention relates to an assembly of a pressurized fluid mechanism and a brake coupled thereto. The assembly comprises an internal fluid distributor value having a communication face defining, within the housing of the assembly, two enclosures separated by the communication face and a brake comprising a brake-release chamber. The brake-release chamber is in permanent communication with at least one of the two enclosures resulting in a high yield motor of moderate cost.

Abstract: The invention relates to a pressure fluid mechanism comprising: a reaction cam; a cylinder block mounted to rotate relative to the cam and including a central void and an axial extension enabling it to be fixed to a support; and an internal fluid distributor valve constrained to rotate with the cam by a link mechanism which extends inside the central void, the cylinder block and its extension constituting an assembly which is interposed between the cam and the internal fluid distributor valve. According to the invention: a) a braking device is disposed at the end of the mechanism towards which the link device extends, the braking device being disposed between the cylinder block and the cam and including a chamber containing brake disks, which chamber is delimited by a cover; b) the link mechanism is constrained to rotate together with the cover of the chamber containing the disks; and c) the cover of the chamber is constrained to rotate with the cam.

Abstract: This invention relates to a hydraulic mechanism having a cylinder block comprising cylinders, pistons mounted in these cylinders, and supporting rollers for abutment on a cam with respect to which the cylinder block is mounted to rotate. The mechanism for holding each roller in position with respect to a corresponding piston comprises two distinct supports which each abut on the inner surface of the cylinder, are maintained in position along the axis of the piston, have their angular orientation with respect to this axis constant and possess a face for abutment against an end face of the roller. One application of the invention is the manufacture of a compact engine.

Abstract: The invention relates to a fluid engine constituted by cylinders divided into two groups, by a valve bank which comprises two enclosures connected selectively to a source of fluid and to a reservoir, and connecting each cylinder of a first group, with the said enclosures, successively, and by means for selecting the speed of the engine, which means comprise a movable member adapted to occupy two positions which, in a first position, creates a communication between the cylinder of the second group and the enclosures, successively, and in a second position, isolate said cylinders from one of the enclosures.Said engine comprises a shuttle valve which, when the movable member is in its second position, connects the cylinders of the second group to that of the two enclosures which contains the fluid under the lowest pressure.The invention finds an application in the production of a mechanically reliable reversible engine.

Abstract: The invention relates to a fluid engine constituted by cylinders divided into two groups, by a valve bank which comprises two enclosures connected selectively to a source of fluid and to a reservoir, and connecting each cylinder of a first group, with the said enclosures, successively, and by means for selecting the speed of the engine, which means comprise a movable member adapted to occupy two positions which, in a first position, creates a communication between the cylinder of the second group and the enclosures, successively, and in a second position, isolate said cylinders from one of the enclosures.Said engine comprises a shuttle valve which, when the movable member is in its second position, connects the cylinders of the second group to that of the two enclosures which contains the fluid under the lowest pressure.The invention finds an application in the production of a mechanically reliable reversible engine.