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AssigneePoclain Hydraulics Industrie
InventorsStephane Vidal, Herve Desumeur, Jean Heren, Clement Recoura, Gilles Lemaire
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The invention relates to a hydraulic apparatus (1) including: a casing (6) defining a first assembly; a shaft (2) defining a second assembly; said first and second assemblies being freely rotatable relative to one another; a multi-lobe cam (3) rotatably connected to one of said first or second assembly; a dispenser (51) and a dispenser cover (52); a cylinder block (4) mounted such as to be freely rotatable relative to said first and second assemblies and including a means for rotatably engaging relative to the other of said assemblies, characterized in that the hydraulic apparatus (1) includes a return means for moving the cylinder block (4) in order to rotatably disengage same from said first or second assembly, and in that the dispenser (5) is configured, when applying pressure, to rotatably engage the cylinder block (4) relative to the other of said first or second assembly.
A hydraulic apparatus with radial pistons, comprising:
A method for displacement of a hydraulic apparatus comprising a casing defining a first assembly, a shaft defining a second assembly, said first and second assemblies being free in rotation one relative to the other, a multilobe cam connected in rotation to one of said first and second assemblies, a cylinder block mounted free in rotation relative to said first and second assemblies, and comprising a plurality of cylinders in which pistons are arranged guided to slide radially in respective cylinders of the cylinder block, supported on the lobes of the cam and being held supported against the cam, support springs arranged in said cylinders so as to keep the pistons supported against the cam, engagement means in rotation adapted, during the application of a command, to immobilise the cylinder block relative to the other of said first and second assemblies and, upon release of the command, to disengage the cylinder block relative to the other of said first and second assemblies, said method being characterized in that immobilisation of the cylinder block by said engagement means relative to the other of said first and second assemblies is controlled so as to execute displacement of the hydraulic apparatus.
Dependencies are inferred from the claim text.