| 摘要 |
A fluid power driving unit for transport and other purposes is made up of an non-magnetic cylinder which may be joined up with a fluid power supply. Within the cylinder there is a glanded free piston having an inner magnetic system for moving an outer runner supported on the outside face of the cylinder, by way of a further magnetic system in the runner. The inner and outer magnetic systems are designed so as to be clear of the inner and outer faces of the cylinder. The cylinder is made up of a number of separate cylinder lengths whose ends are overlapping and furthermore each cylinder length has a stiffening and reinforcing rail, which rails are joined together at their ends and may be undone from each other if desired.
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