| 摘要 |
<p>The disclosure relates to an apparatus with two limit positions generating a reciprocating motion, the apparatus comprising a first moving part (4a, 4b) and a second moving part (16a, 16b) between which parts (4a, 4b; 16a, 16b) a pressurized drive medium (38), appropriately compressed air, is disposed simultaneously to displace the moving parts (4a, 4b; 16a, 16b) in mutually opposite directions. At least the first moving part (4a, 4b) is actuated, by a constantly present force, for example in that the pressure of the driving media (38) is applied on at least one surface of the first moving part (4a, 4b), in the forward direction under tensioning of an associated force accumulator (20a), for example a spring. The above-mentioned pressurized drive medium (38) is moreover applied between the first and second moving parts (4a, 4b; 16a, 16b) such that the second moving part (16a, 16b) is disposed, in the forward direction, to tension an associated force accumulator (19a, 19b) under simultaneous cancelling of the load on the force accumulator (20a) associated with the first moving part (4a, 4b).</p> |
