| 摘要 |
<p>The invention relates to different types of hydraulic nuts comprising a pressure system with screws that can move up to an end stop, no additional advancement of the screws being possible once the course of the screws has been completed, in order to prevent leakage of the hydraulic fluid. The hydraulic nut of the invention can be used in a preventive manner, in that the nut can indicate a decrease or increase in the pre-defined tension at which it is to function, or can indicate that it has reached the tension at which it is to be mounted. For example, the nut can comprise a visual or acoustic warning device or can emit a warning signal by means of phototransistors or radiofrequency.</p> |
