| 摘要 |
<p>A clamping element comprises a single-acting cylinder and a piston with strong spring return which can be cancelled out by introduction of a pressure medium into the pressure chamber of the cylinder. The spring return is brought about, at least mainly, by means of a sleeve (6a, 6b) of rubber or rubber-like material which occupies a gap (5, 5b) between the piston (3, 3a, 3b) and the cylinder wall (7, 7a, 7b) or a lining (40) arranged in the cylinder. The rubber sleeve is firmly vulcanised, firmly glued or surface-fixed in some other manner against the cylindrical exterior of the piston and against the wall of the cylinder or the said lining along an axial length which considerably exceeds the thickness of the gap (5, 5b).</p> |
