| 摘要 |
A fluid power rotary drive device, which possesses two oppositely moving drive pistons and an output drive part in mesh with the same. With the aid of a position presetting means it is possible to preset an intermediate position of the output drive part. For this purpose an abutment unit is provided, which has two abutment parts arranged as an axial extension of the two drive pistons. The abutment unit is able to be moved relatively to the drive piston into a positioning setting, in which the two abutment parts are both in engagement with the respectively associated drive piston, something which corresponds to the desired intermediate position.
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